Cleanup listing for WikiProject Astronomy as of October 17, 2017.

Of the 46974 articles in this project 3570 or 8% are marked for cleanup, with 5306 issues in total.

Listings: Alphabetic By category CSV History

ArticleImportanceClassCount OldestIssues
(119070) 2001 KP77Low Start1 April 2017Unsourced statements (April 2017)
(119951) 2002 KX14Mid Start2 July 2014Unsourced statements (July 2014), Dead external links (June 2017)
(120348) 2004 TY364Low Stub2 2014Detailed references needed, Potentially dated statements (2014)
(145452) 2005 RN43Low Start1 May 2012Unsourced statements (May 2012)
(148209) 2000 CR105Mid Start2 2015Potentially dated statements (2015, August 2017)
(162058) 1997 AE12Low Start1 July 2017Failed verification (July 2017)
(179806) 2002 TD66Low Stub1 October 2011Potentially dated statements (October 2011)
(208996) 2003 AZ84Mid C1 2012Potentially dated statements (2012)
(225088) 2007 OR10Mid C2 February 2016Potentially dated statements (2017, February 2016)
(229762) 2007 UK126Low Start1 August 2011Potentially dated statements (August 2011)
(242450) 2004 QY2Low Start1 2013Potentially dated statements (2013)
(278361) 2007 JJ43Low Start1 2014Potentially dated statements (2014)
(316179) 2010 EN65Low Start1 2016Potentially dated statements (2016)
(322756) 2001 CK32Low Stub1 January 2016Unsourced statements (January 2016)
(33340) 1998 VG44Low Stub1 June 2017Dead external links (June 2017)
(336756) 2010 NV1Low Start1 2016Potentially dated statements (2016)
(343158) 2009 HC82Low Start1 2012Potentially dated statements (2012)
(374158) 2004 ULLow Start1 August 2016Unsourced statements (August 2016)
(385185) 1993 ROLow Stub1 October 2013References needed (October 2013)
(385695) 2005 TO74Low Stub2 2016Potentially dated statements (2016), Unsourced statements (August 2017)
(386454) 2008 XMLow Start1 October 2016Unsourced statements (October 2016)
(386723) 2009 YE7Mid Start1 June 2017Dead external links (June 2017)
(394130) 2006 HY51Low Start1 August 2016Unsourced statements (August 2016)
(415029) 2011 UL21Low Start1 June 2017Dead external links (June 2017)
(418993) 2009 MS9Low Stub1 2016Potentially dated statements (2016)
(450894) 2008 BT18Low Start1 June 2017Dead external links (June 2017)
(467336) 2002 LT38Low Stub1 August 2012Notability unclear (August 2012)
(480808) 1994 XL1Low Start1 August 2017Unsourced statements (August 2017)
(4953) 1990 MULow Start1 April 2011Unsourced statements (April 2011)
(52747) 1998 HM151Low Stub1 June 2017Dead external links (June 2017)
(55565) 2002 AW197Low Start1 2013Potentially dated statements (2013)
(6178) 1986 DALow Start1 February 2016Unsourced statements (February 2016)
(66391) 1999 KW4Low Start1 June 2017Failed verification (June 2017)
(75482) 1999 XC173Low Start1 2016Potentially dated statements (2016)
(78799) 2002 XW93Low Start1 February 2016Unsourced statements (February 2016)
1 AquariiLow Stub1 December 2015Unsourced statements (December 2015)
1 ScorpiiLow Stub1 April 2017References needed (April 2017)
10 HygieaLow GA2 July 2016Unsourced statements (July 2016), Expansion needed (April 2017)
10 VulpeculaeLow Stub1 April 2009Sources lacking (April 2009)
101 PisciumLow Stub1 March 2016References needed (March 2016)
101955 BennuMid Start4 2014Expert attention needed (September 2017), Potentially dated statements (2014), Too technical (September 2017)
10199 CharikloUnknown C1 2014Potentially dated statements (2014)
10370 HylonomeLow Start1 Citation with accessdate and no URL
106 DioneLow Stub1 March 2013Unsourced statements (March 2013)
109 VirginisLow Stub1 August 2009References needed (August 2009)
1094 SiberiaLow Start1 September 2017Unsourced statements (September 2017)
11 CamelopardalisLow Stub1 August 2017References needed (August 2017)
11 CancriLow Stub1 November 2013In-text citations lacking (November 2013)
11 Leonis MinorisLow Stub1 December 2015Unsourced statements (December 2015)
11 Ursae MinorisLow Stub1 January 2014Unsourced statements (January 2014)
110 HerculisLow Stub1 May 2017Unsourced statements (May 2017)
110 LydiaLow Start1 Citation with accessdate and no URL
110 VirginisLow Stub1 August 2009Sources lacking (August 2009)
1103 SequoiaLow Stub1 August 2015Unsourced statements (August 2015)
11264 ClaudiomacconeLow Start1 April 2017Unsourced statements (April 2017)
1164 KoboldaLow Start1 September 2017Original research (September 2017)
12 AndromedaeLow Stub1 April 2009In-text citations lacking (April 2009)
12 AquilaeLow Start1 September 2016Unsourced statements (September 2016)
12 AurigaeLow Stub1 January 2017Unsourced statements (January 2017)
12 Canis MajorisLow Stub1 October 2009Sources lacking (October 2009)
12 LyncisLow Stub1 Citation with accessdate and no URL
121 HermioneMid Start1 January 2012Unsourced statements (January 2012)
124 AlkesteLow Stub1 January 2011Unsourced statements (January 2011)
125 LiberatrixLow Stub1 Citation with accessdate and no URL
12696 CamusLow Start1 Citation with accessdate and no URL
13 AndromedaeLow Stub1 July 2012References needed (July 2012)
13 CancriLow Stub1 January 2017References needed (January 2017)
13 Comae BerenicesLow Stub1 August 2017Sources lacking (August 2017)
13 EgeriaLow Stub1 April 2014Unsourced statements (April 2014)
13 ScorpiiLow Start1 Citation with accessdate and no URL
1335 DemoulinaLow Stub1 June 2017Dead external links (June 2017)
1340 YvetteLow Stub1 August 2012Unsourced statements (August 2012)
136 AustriaLow Stub1 Citation with accessdate and no URL
1372 HaremariLow Stub1 CS1 errors: chapter ignored
14 AndromedaeLow Stub1 July 2012Unsourced statements (July 2012)
14 Canis MinorisLow Stub1 May 2017Sources lacking (May 2017)
14 EridaniLow Stub1 March 2007Sources lacking (March 2007)
14 LacertaeLow Stub1 August 2017Sources lacking (August 2017)
144 VibiliaLow Start1 December 2010Unsourced statements (December 2010)
147 ProtogeneiaLow Start1 December 2010Unsourced statements (December 2010)
14827 HypnosLow Start1 September 2017Unsourced statements (September 2017)
1490 Ch'ing-yang eventLow Start1 October 2017Unsourced statements (October 2017)
14P/WolfLow Stub1 February 2016Unsourced statements (February 2016)
15 AndromedaeLow Stub1 July 2012Unsourced statements (July 2012)
15 BoötisLow Stub1 April 2017In-text citations lacking (April 2017)
153 HildaMid Start1 December 2010Unsourced statements (December 2010)
15810 ArawnLow Start1 August 2016Unsourced statements (August 2016)
16 AurigaeLow Stub2 April 2017Unsourced statements (April 2017), References needed (April 2017)
16 CepheiLow Stub1 May 2017References needed (May 2017)
16 PsycheMid C1 October 2013Unsourced statements (October 2013)
162173 RyuguLow Stub1 July 2016Failed verification (July 2016)
1663 van den BosLow Start1 December 2016Unsourced statements (December 2016)
17 VulpeculaeLow Stub1 April 2015References needed (April 2015)
1700 ZvezdaraLow Start1 November 2015Factual verification needed (November 2015)
1724 VladimirLow Start1 September 2017Clarification needed (September 2017)
1751 HergetLow Start1 November 2015Unsourced statements (November 2015)
1769 Transit of Venus observed from TahitiMid C1 April 2016Clarification needed (April 2016)
18 BoötisLow Stub2 May 2012Unsourced statements (May 2012), References needed (April 2017)
1826 MillerLow Start1 December 2016Unsourced statements (December 2016)
1850 KohoutekLow Start1 November 2015Unsourced statements (November 2015)
1858 LobachevskijLow Start1 October 2015Dead external links (October 2015)
18610 ArthurdentLow Start1 April 2016Unsourced statements (April 2016)
1863 AntinousLow Start1 November 2015Unsourced statements (November 2015)
19 AurigaeLow Stub1 April 2017In-text citations lacking (April 2017)
19 Canum VenaticorumLow Stub2 June 2017Unsourced statements (June 2017), References needed (June 2017)
1909 AlekhinLow Start1 November 2010Dead external links (November 2010)
1917 CuyoLow Stub1 Citation with accessdate and no URL
196 PhilomelaLow Stub1 March 2008Unsourced statements (March 2008)
1991 BALow Start1 September 2016Unsourced statements (September 2016)
1998 WW31Unknown Stub1 October 2013References needed (October 2013)
1999 TR11Unknown Stub1 February 2016Orphaned (February 2016)
2 PallasHigh GA2 November 2014Unsourced statements (October 2015, November 2014)
2 ScorpiiLow Stub1 November 2012In-text citations lacking (November 2012)
20 Canum VenaticorumLow Stub1 December 2009Sources lacking (December 2009)
2001 QR322Low Start1 August 2017Unsourced statements (August 2017)
2002 EulerLow Start1 October 2015Unsourced statements (October 2015)
2003 HB57Low Stub1 August 2017Notability unclear (August 2017)
2003 QX113Mid Start2 February 2016Potentially dated statements (February 2016, August 2017)
2003 SM84Low Stub1 January 2016Unsourced statements (January 2016)
2004 FHLow Start1 November 2008Potentially dated statements (November 2008)
2004 FU162Low Start2 2008Potentially dated statements (2008), Unsourced statements (April 2017)
2004 KV18Low Start1 August 2017Unsourced statements (August 2017)
2005 RH52Low Stub1 August 2017Notability unclear (August 2017)
2005 TN53Low Start1 August 2017Unsourced statements (August 2017)
2006 QH181Unknown Start1 August 2017Potentially dated statements (August 2017)
2006 RJ103Low Start2 2016Potentially dated statements (2016), Unsourced statements (August 2017)
2007 VL305Low Start2 2016Potentially dated statements (2016), Unsourced statements (August 2017)
2008 KV42Low Start1 February 2017Unsourced statements (February 2017)
2008 LC18Low Start2 2016Potentially dated statements (2016), Unsourced statements (August 2017)
2008 ST291Unknown Start1 August 2017Potentially dated statements (August 2017)
2008 TC3Low C1 September 2010Dead external links (September 2010)
201 PenelopeLow Stub1 Citation with accessdate and no URL
2010 BK118Low Stub1 2016Potentially dated statements (2016)
2010 GB174Unknown Stub1 August 2017Potentially dated statements (August 2017)
2010 RF43Unknown Stub1 February 2013Unsourced statements (February 2013)
2012 FC71Low Start1 June 2017Dead external links (June 2017)
2012 National Reconnaissance Office space telescope donation to NASAMid Start1 Detailed references needed
2012 TC4Low Start1 October 2017Disputed statements (October 2017)
2012 VP113Low C1 August 2017Potentially dated statements (August 2017)
2012 XE133Low Start1 January 2016Unsourced statements (January 2016)
2012 in astronomyLow List2 June 2012Update needed (June 2012), Orphaned (September 2017)
2013 FS28Low Stub1 August 2017Notability unclear (August 2017)
2013 FY27Low Start1 August 2017Potentially dated statements (August 2017)
2013 MZ5Unknown Stub1 December 2013Notability unclear (December 2013)
2013 ND15Low Start1 September 2016Dead external links (September 2016)
2013 RF98Low Stub1 October 2016Potentially dated statements (October 2016)
2013 TV135Low Start1 February 2014Potentially dated statements (February 2014)
2014 FC69Low Stub2 February 2016Potentially dated statements (February 2016, August 2017)
2014 FE72Low Stub1 February 2017Potentially dated statements (February 2017)
2014 JO25Low Stub1 June 2017References needed (June 2017)
2014 UZ224Unknown Stub1 August 2017Potentially dated statements (August 2017)
2015 Kerala meteoriteUnknown Start1 March 2015Unsourced statements (March 2015)
2015 YU9Low Start2 August 2017Unsourced statements (August 2017), Failed verification (August 2017)
2016 PQLow Start1 August 2017Unsourced statements (August 2017)
2024 McLaughlinLow Start1 September 2016Unsourced statements (September 2016)
20461 DioretsaLow Start2 April 2016Unsourced statements (April 2016, June 2017)
21 AquariiLow Stub1 December 2009References needed (December 2009)
21 Canum VenaticorumLow Stub1 December 2009References needed (December 2009)
21 LutetiaMid B1 January 2010Unsourced statements (January 2010)
21088 ChelyabinskLow Start1 Citation with accessdate and no URL
21785 MéchainLow Stub1 April 2016Notability unclear (April 2016)
22 BoötisLow Stub1 March 2017Sources lacking (March 2017)
22 CamelopardalisLow Stub1 December 2009Sources lacking (December 2009)
22 ScorpiiLow Stub1 January 2017Sources lacking (January 2017)
220 StephaniaLow Stub1 March 2008Unsourced statements (March 2008)
2328 RobesonLow Stub1 October 2015Unsourced statements (October 2015)
2340 HathorLow Start1 January 2017Unsourced statements (January 2017)
235 CarolinaLow Stub1 December 2015In-text citations lacking (December 2015)
24 Canum VenaticorumLow Stub1 December 2009References needed (December 2009)
24 CapricorniLow Stub2 December 2009References needed (December 2009, February 2017)
2486 MetsähoviLow Start1 October 2015Unsourced statements (October 2015)
249 IlseLow Stub1 November 2013In-text citations lacking (November 2013)
25 Canum VenaticorumLow Stub1 December 2009Sources lacking (December 2009)
254 AugustaLow Stub1 October 2015Unsourced statements (October 2015)
258 TycheLow Start1 October 2015Unsourced statements (October 2015)
26 AurigaeLow Stub1 June 2017Unsourced statements (June 2017)
26 CamelopardalisLow Stub1 December 2009Sources lacking (December 2009)
26 Canis MajorisLow Stub1 December 2009Sources lacking (December 2009)
2658 GingerichLow Stub1 June 2017Dead external links (June 2017)
268 AdoreaLow Stub1 August 2011Unsourced statements (August 2011)
26858 MisterrogersLow Stub2 February 2012Unsourced statements (September 2012, February 2012)
27 Canis MajorisLow Stub1 December 2012References needed (December 2012)
27 EuterpeLow Start1 December 2013Clarification needed (December 2013)
27 HydraeLow Stub1 November 2009References needed (November 2009)
2747 Český KrumlovLow Start1 October 2015Unsourced statements (October 2015)
28 AndromedaeLow Stub1 Citation with accessdate and no URL
28 VulpeculaeLow Stub1 August 2017Sources lacking (August 2017)
2903 ZhuhaiLow Stub1 January 2012References needed (January 2012)
2956 YeomansLow Start1 September 2017Unsourced statements (September 2017)
2984 ChaucerLow Stub1 October 2015Unsourced statements (October 2015)
2MASS 0036+1821Low Stub1 October 2010Sources lacking (October 2010)
2MASS 0532+8246Low Stub2 January 2017Unsourced statements (January 2017), References needed (January 2017)
2MASS 1507-1627Low Stub1 January 2017Sources lacking (January 2017)
2MASSI J0937347+293142Low Stub1 January 2017Unsourced statements (January 2017)
3 BoötisLow Stub2 October 2016References needed (October 2016), Unsourced statements (October 2016)
3 CamelopardalisLow Stub1 February 2016Sources lacking (February 2016)
3 VulpeculaeLow Stub1 December 2016Unsourced statements (December 2016)
3.67 m Advanced Electro Optical System TelescopeBottom Stub1 February 2016References needed (February 2016)
30 MonocerotisLow Stub1 April 2017Unsourced statements (April 2017)
306 UnitasLow Stub1 March 2008Unsourced statements (March 2008)
31 BoötisLow Stub1 April 2017In-text citations lacking (April 2017)
3122 FlorenceLow Start1 2017Potentially dated statements (2017)
3131 Mason-DixonLow Stub1 November 2013References needed (November 2013)
3198 WalloniaLow Stub1 May 2015References needed (May 2015)
32 VulpeculaeLow Stub1 February 2016Sources lacking (February 2016)
325 HeidelbergaLow Stub1 Citation with accessdate and no URL
34 BoötisLow Stub2 August 2017References needed (August 2017), Unsourced statements (September 2017)
3412 KafkaLow Start1 December 2016Unsourced statements (December 2016)
35 PisciumLow Stub1 May 2017Unsourced statements (May 2017)
3568 ASCIILow Stub1 December 2009References needed (December 2009)
3581 AlvarezLow Stub1 July 2016Unsourced statements (July 2016)
36 AndromedaeLow Stub2 July 2012Unsourced statements (July 2012), References needed (April 2017)
36 AurigaeLow Stub2 January 2017Unsourced statements (January 2017), Factual verification needed (January 2017)
36 CancriLow Stub1 February 2017References needed (February 2017)
367943 DuendeLow C1 December 2014Unsourced statements (December 2014)
37 GeminorumLow Start1 May 2010Unsourced statements (May 2010)
37 Leonis MinorisLow Stub1 May 2017Unsourced statements (May 2017)
3790 RaywilsonLow Stub1 August 2012Unsourced statements (August 2012)
38 LyncisLow Stub1 August 2017Unsourced statements (August 2017)
381 MyrrhaLow Stub1 CS1 errors: chapter ignored
3854 GeorgeLow Stub1 May 2015Weasel-worded phrases (May 2015)
385446 ManwëLow Start1 May 2016Update needed (May 2016)
385571 OtreraLow Start1 August 2017Unsourced statements (August 2017)
38628 HuyaLow Start1 September 2017Unsourced statements (September 2017)
387 AquitaniaLow Stub1 September 2016Dead external links (September 2016)
389 IndustriaLow Stub1 May 2016References needed (May 2016)
39 AndromedaeLow Stub1 April 2017References needed (April 2017)
390 AlmaLow Stub2 August 2015Original research (August 2015), Unsourced statements (August 2015)
392 WilhelminaLow Stub1 May 2016References needed (May 2016)
394 ArduinaLow Stub1 May 2016References needed (May 2016)
395 DeliaLow Stub1 May 2016References needed (May 2016)
396 AeoliaLow Stub1 May 2016References needed (May 2016)
3C 109Low Stub1 April 2015Orphaned (April 2015)
3C 171Low Stub1 April 2015Orphaned (April 2015)
3C 219Low Stub1 April 2015Orphaned (April 2015)
3C 223Low Stub1 April 2015Orphaned (April 2015)
3C 244.1Low Start1 December 2013Orphaned (December 2013)
3C 249.1Low Stub1 April 2015Orphaned (April 2015)
3C 268.3Low Stub1 September 2017Orphaned (September 2017)
3C 305Low Stub1 April 2015Orphaned (April 2015)
4 AndromedaeLow Stub1 July 2012References needed (July 2012)
4 Canum VenaticorumLow Stub1 September 2017References needed (September 2017)
4 CentauriLow Start1 February 2017Unsourced statements (February 2017)
4 EquuleiLow Stub1 April 2017References needed (April 2017)
4 Ursae MajorisLow Start1 2011Potentially dated statements (2011)
4 VulpeculaeLow Stub1 October 2016References needed (October 2016)
40 EridaniMid C3 May 2011Unsourced statements (May 2011, June 2017), Citation lacking title
4001 PtolemaeusLow Stub1 November 2013References needed (November 2013)
401 OttiliaLow Stub1 March 2015References needed (March 2015)
402 ChloëLow Stub1 May 2016References needed (May 2016)
403 CyaneLow Stub1 May 2016References needed (May 2016)
406 ErnaLow Stub1 May 2016References needed (May 2016)
4065 MeinelLow Start1 November 2016Unsourced statements (November 2016)
407 ArachneLow Stub1 May 2016References needed (May 2016)
41 CapricorniLow Stub1 December 2009References needed (December 2009)
41 G. AraeLow C1 June 2016Unsourced statements (June 2016)
41 Ursae MajorisLow Stub1 September 2015References needed (September 2015)
411 XantheLow Stub1 May 2016References needed (May 2016)
413 EdburgaLow Stub1 May 2016References needed (May 2016)
414 LiriopeLow Stub1 May 2016References needed (May 2016)
417 SueviaLow Stub1 May 2016References needed (May 2016)
4183 CunoLow Start1 February 2016Unsourced statements (February 2016)
4197 MorpheusLow Start1 March 2016Unsourced statements (March 2016)
42 CamelopardalisLow Stub1 May 2017In-text citations lacking (May 2017)
42 CapricorniLow Stub1 December 2009Sources lacking (December 2009)
42 DraconisLow Stub1 December 2015Unsourced statements (December 2015)
420356 PraamziusLow Start1 September 2017Unsourced statements (September 2017)
421 ZähringiaLow Stub1 May 2016References needed (May 2016)
423 DiotimaLow Start1 September 2016Dead external links (September 2016)
42355 TyphonLow Stub1 April 2014Unsourced statements (April 2014)
424 GratiaLow Stub1 May 2016References needed (May 2016)
425 CorneliaLow Stub1 May 2016References needed (May 2016)
426 HippoLow Stub1 January 2014References needed (January 2014)
427 GaleneLow Stub1 May 2016References needed (May 2016)
4276 CliffordLow Start1 June 2017Unsourced statements (June 2017)
429 LotisLow Stub1 December 2009References needed (December 2009)
43 CamelopardalisLow Stub2 December 2010References needed (December 2010), Unsourced statements (December 2015)
431 NepheleLow Stub1 May 2016References needed (May 2016)
436 PatriciaLow Stub1 May 2016References needed (May 2016)
438 ZeuxoLow Stub1 May 2016References needed (May 2016)
440 TheodoraLow Stub1 May 2016References needed (May 2016)
443 PhotographicaLow Stub1 May 2016References needed (May 2016)
447 ValentineLow Stub1 May 2016References needed (May 2016)
448 NatalieLow Stub1 May 2016References needed (May 2016)
45 AndromedaeLow Stub1 April 2017References needed (April 2017)
45 AurigaeLow Stub1 March 2017In-text citations lacking (March 2017)
45 EugeniaHigh C1 August 2010Unsourced statements (August 2010)
45 HerculisLow Stub1 July 2017Unsourced statements (July 2017)
450 BrigittaLow Stub1 December 2009References needed (December 2009)
4581 AsclepiusLow Start2 March 2017Unsourced statements (March 2017, May 2017)
46 CapricorniLow Stub1 May 2014Unsourced statements (May 2014)
46 Leonis MinorisLow Start1 November 2016Unsourced statements (November 2016)
462 EriphylaLow Stub1 May 2015References needed (May 2015)
464 MegairaLow Stub1 December 2009Sources lacking (December 2009)
47 Ursae MajorisMid GA3 2008Potentially dated statements (2008, 2011), Clarification needed (November 2014)
473 NolliLow Stub1 August 2015Dead external links (August 2015)
4786 TatianinaLow Stub1 May 2015References needed (May 2015)
479 CapreraLow Stub1 May 2016References needed (May 2016)
48 CassiopeiaeLow Stub1 January 2017References needed (January 2017)
483 SeppinaLow Stub1 May 2016References needed (May 2016)
486 CremonaLow Stub1 May 2016References needed (May 2016)
4897 TomhamiltonLow Start2 August 2016Unsourced statements (August 2016, September 2017)
49 CamelopardalisLow Stub1 December 2009Sources lacking (December 2009)
492 GismondaLow Stub1 May 2016References needed (May 2016)
4923 ClarkeLow Stub1 April 2016References needed (April 2016)
495 EulaliaLow Stub1 May 2016References needed (May 2016)
497 IvaLow Stub1 May 2016References needed (May 2016)
4A/OPUnknown Start2 April 2009In-text citations lacking (April 2009), Unsourced statements (April 2009)
4C +37.11Low Stub1 March 2015Unsourced statements (March 2015)
4C ArrayLow Stub1 October 2015Sources lacking (October 2015)
4U 0142+61Low Stub1 May 2017In-text citations lacking (May 2017)
4U 0614+091Low Stub1 March 2017In-text citations lacking (March 2017)
5 AquariiLow Stub1 January 2017Unsourced statements (January 2017)
5 Canum VenaticorumLow Stub1 December 2009Sources lacking (December 2009)
5 TauriLow Stub1 October 2016References needed (October 2016)
50 BoötisLow Stub1 April 2017In-text citations lacking (April 2017)
50 CassiopeiaeLow Stub1 December 2009References needed (December 2009)
500 SelinurLow Stub1 January 2016References needed (January 2016)
501 UrhixidurLow Stub1 December 2015References needed (December 2015)
502 SiguneLow Stub1 January 2016References needed (January 2016)
5026 MartesLow Start1 March 2017Unsourced statements (March 2017)
506 MarionLow Stub1 May 2008References needed (May 2008)
507 LaodicaLow Stub1 May 2016References needed (May 2016)
508 PrincetoniaLow Stub1 December 2009References needed (December 2009)
509 IolandaLow Stub1 May 2016References needed (May 2016)
51 Pegasi bMid C1 October 2014References needed (October 2014)
510 MabellaLow Stub1 May 2016References needed (May 2016)
511 DavidaUnknown Start2 2010Potentially dated statements (2010), Dead external links (September 2016)
514 ArmidaLow Stub1 May 2016References needed (May 2016)
516 AmherstiaLow Stub1 March 2015Unsourced statements (March 2015)
518 HalaweLow Stub1 May 2016References needed (May 2016)
51824 MikeandersonLow Stub1 April 2016Unsourced statements (April 2016)
51825 DavidbrownLow Stub1 April 2016Unsourced statements (April 2016)
51826 KalpanachawlaLow Stub1 April 2016Unsourced statements (April 2016)
51827 LaurelclarkLow Stub1 April 2016Unsourced statements (April 2016)
51828 IlanramonLow Stub1 April 2016Unsourced statements (April 2016)
51829 WilliemccoolLow Stub1 April 2016Unsourced statements (April 2016)
519 SylvaniaLow Stub1 May 2016References needed (May 2016)
51P/HarringtonLow Stub1 Citation with accessdate and no URL
522 HelgaLow Stub1 September 2014References needed (September 2014)
524 FidelioLow Stub1 May 2016References needed (May 2016)
526 JenaLow Stub1 May 2016References needed (May 2016)
527 EuryantheLow Stub1 May 2016References needed (May 2016)
52975 CyllarusLow Start1 April 2017Unsourced statements (April 2017)
53 CamelopardalisLow Stub1 December 2009Sources lacking (December 2009)
533 SaraLow Stub1 May 2016References needed (May 2016)
5335 DamoclesLow Start2 February 2017Potentially dated statements (2017), Unsourced statements (February 2017)
534 NassoviaLow Stub1 May 2016References needed (May 2016)
539 PaminaLow Stub1 May 2013References needed (May 2013)
54 AurigaeLow Stub1 March 2017In-text citations lacking (March 2017)
544 JettaLow Stub1 May 2016References needed (May 2016)
54598 BienorLow Stub1 2015Potentially dated statements (2015)
547 PraxedisLow Stub1 December 2015References needed (December 2015)
548 KressidaLow Stub1 May 2016References needed (May 2016)
549 JessondaLow Stub1 May 2016References needed (May 2016)
55 AndromedaeLow Stub1 April 2017References needed (April 2017)
55 CancriMid GA3 April 2014Potentially dated statements (2015), Unsourced statements (April 2014, October 2017)
55 Cancri fLow GA1 May 2012Unsourced statements (May 2012)
55 PandoraLow Stub1 December 2010Unsourced statements (December 2010)
551 OrtrudLow Stub1 May 2016References needed (May 2016)
55576 AmycusLow Start1 October 2010Dead external links (October 2010)
556 PhyllisLow Stub1 December 2015References needed (December 2015)
56 AndromedaeLow Stub1 April 2017References needed (April 2017)
56 CetiLow Stub1 February 2017Unsourced statements (February 2017)
56 MeleteLow Stub1 December 2010Unsourced statements (December 2010)
566 StereoskopiaLow Stub1 December 2015References needed (December 2015)
567 EleutheriaLow Stub1 May 2016References needed (May 2016)
569 MisaLow Stub1 May 2016References needed (May 2016)
57 CancriLow Stub1 December 2009Sources lacking (December 2009)
570 KytheraLow Stub1 May 2016References needed (May 2016)
571 DulcineaLow Stub1 May 2016References needed (May 2016)
572 RebekkaLow Stub1 December 2015References needed (December 2015)
57424 CaelumnoctuLow Stub1 December 2013References needed (December 2013)
576 EmanuelaLow Stub1 May 2016References needed (May 2016)
577 RheaLow Stub1 May 2016References needed (May 2016)
578 HappeliaLow Stub1 May 2016References needed (May 2016)
59 AndromedaeLow Stub1 May 2017References needed (May 2017)
596 ScheilaLow Start1 February 2015Disputed statements (February 2015)
6 Canis MinorisLow Stub1 December 2009References needed (December 2009)
6 Canum VenaticorumLow Stub1 December 2009Sources lacking (December 2009)
60 CancriLow Stub1 December 2009Sources lacking (December 2009)
61 LeonisLow Stub1 February 2017References needed (February 2017)
61 Ursae MajorisLow Start1 December 2010Unsourced statements (December 2010)
62 EratoLow Stub1 August 2012Unsourced statements (August 2012)
63 CygniLow Stub1 March 2017References needed (March 2017)
64 EridaniLow Stub1 December 2013References needed (December 2013)
65 AndromedaeLow Stub1 April 2017References needed (April 2017)
65 AurigaeLow Stub1 March 2017In-text citations lacking (March 2017)
65 CybeleMid Start1 September 2015Clarification needed (September 2015)
656 BeagleLow Stub1 August 2012Unsourced statements (August 2012)
66 AndromedaeLow Stub1 April 2017References needed (April 2017)
66 AurigaeLow Stub1 April 2017Sources lacking (April 2017)
67 CancriLow Stub1 April 2017Unsourced statements (April 2017)
67P/Churyumov–GerasimenkoLow C4 September 2014Potentially dated statements (September 2014, July 2016), Unsourced statements (August 2015), Clarification needed (October 2015)
68 AquilaeLow Stub1 July 2012Unsourced statements (July 2012)
6S (radiative transfer code)Unknown Stub1 December 2008In-text citations lacking (December 2008)
7 AquariiLow Stub1 September 2016References needed (September 2016)
7 CamelopardalisLow Stub1 May 2017Sources lacking (May 2017)
704 InteramniaUnknown Start2 2010Potentially dated statements (2010), Dead external links (September 2016)
7066 NessusUnknown Start1 June 2017Dead external links (June 2017)
71 CancriLow Stub1 October 2017Merge needed (October 2017)
71 TauriLow Stub1 March 2017Unsourced statements (March 2017)
727 NipponiaLow Stub1 December 2011References needed (December 2011)
74 GalateaLow Stub1 March 2016Unsourced statements (March 2016)
742 EdisonaLow Stub1 March 2015Unsourced statements (March 2015)
763 CupidoLow Stub1 May 2016References needed (May 2016)
774–775 carbon-14 spikeLow Start1 February 2016Clarification needed (February 2016)
779 NinaLow Stub1 January 2014References needed (January 2014)
7796 JáracimrmanLow Start1 March 2017Unsourced statements (March 2017)
78 AquariiLow Stub1 December 2009References needed (December 2009)
7835 MyroncopeLow Start1 Citation with accessdate and no URL
785 ZwetanaLow Stub1 March 2013Unsourced statements (March 2013)
789 LenaLow Start1 July 2016Unsourced statements (July 2016)
79 CancriLow Stub1 December 2009References needed (December 2009)
8 AndromedaeLow Stub1 July 2012References needed (July 2012)
8 AquariiLow Stub2 April 2017Unsourced statements (April 2017), References needed (April 2017)
8 CancriLow Stub1 December 2009Sources lacking (December 2009)
8 FloraUnknown C2 November 2008Unsourced statements (November 2008), Dead external links (June 2017)
80 SapphoLow Stub1 August 2017Unsourced statements (August 2017)
804 HispaniaLow Stub1 May 2016Unsourced statements (May 2016)
80P/Peters–HartleyUnknown Stub1 July 2016Sources lacking (July 2016)
812 AdeleLow Stub1 June 2009References needed (June 2009)
823 SisigambisLow Stub2 Citation with bare URL, Citation lacking title
83 BeatrixLow Stub1 February 2017Unsourced statements (February 2017)
8441 LapponicaLow Stub1 June 2016Dead external links (June 2016)
847 AgniaLow Stub2 May 2014Dead external links (May 2014, December 2016)
85 IoLow Stub1 September 2015Dead external links (September 2015)
871 AmnerisLow Stub1 August 2009Unsourced statements (August 2009)
873 MechthildLow Stub1 November 2016Unsourced statements (November 2016)
88 modern constellations in different languagesLow Start1 July 2017References needed (July 2017)
88611 TeharonhiawakoUnknown Stub1 November 2009Unsourced statements (November 2009)
9 BoötisLow Stub1 April 2017In-text citations lacking (April 2017)
9 EquuleiLow Stub1 April 2017References needed (April 2017)
9 MetisLow B1 June 2007Unsourced statements (June 2007)
90 AntiopeMid C1 December 2011Unsourced statements (December 2011)
90377 SednaHigh FA4 2010Potentially dated statements (2010, 2015, 2014, August 2017)
91 AquariiLow C1 January 2012Unsourced statements (January 2012)
92P/SanguinLow Stub1 December 2015Wikilinks needed (December 2015)
93 MinervaLow Start1 October 2015Factual verification needed (October 2015)
94 CetiLow Start1 Citation with accessdate and no URL
944 HidalgoLow Start1 March 2008Unsourced statements (March 2008)
951 GaspraMid B1 February 2015Unsourced statements (February 2015)
96 AquariiLow Stub1 December 2009References needed (December 2009)
99942 ApophisMid C6 April 2008References needed (April 2008, July 2008), Unsourced statements (January 2010), Potentially dated statements (February 2013, September 2017), Update needed (September 2013)
A Message from EarthBottom Start1 June 2017Dead external links (June 2017)
A. M. MathaiLow Start1 September 2009Promotional tone (September 2009)
A.T. Charlie JohnsonUnknown Start2 March 2015Promotional tone (March 2015), Reliable references lacking (March 2015)
A1689-zD1Low Stub1 February 2008Potentially dated statements (February 2008)
A2261-BCGLow Stub1 July 2017References needed (July 2017)
A2744 YD4Low Stub1 April 2017Orphaned (April 2017)
AB AurigaeMid Start1 July 2010In-text citations lacking (July 2010)
ADS 7251Low Stub1 December 2015Sources lacking (December 2015)
AE AquariiMid Start2 October 2016CS1 errors: chapter ignored, Dead external links (October 2016)
AERONETLow Stub1 February 2017In-text citations lacking (February 2017)
AESP-14Unknown Stub2 May 2015Unsourced statements (May 2015), Dead external links (June 2017)
AMBER (Very Large Telescope)Unknown Start2 Citation with bare URL, Citation lacking title
ASASSN-16maLow Stub1 December 2016Unsourced statements (December 2016)
ASCOM (standard)Low Start1 February 2014In-text citations lacking (February 2014)
ASTRONLow C1 March 2015Sources lacking (March 2015)
AXe Spectral ExtractionLow Start1 October 2010Sources lacking (October 2010)
AZ CancriLow Start2 July 2014Unsourced statements (July 2014), Dead external links (October 2016)
Abbe (crater)Low Start1 February 2008In-text citations lacking (February 2008)
Abd al-Rahman al-SufiHigh Start1 Citation with accessdate and no URL
Abdul Majid (physicist)Low Start1 October 2016Dead external links (October 2016)
Abell 12Low Stub2 October 2016Dead external links (October 2016, September 2017)
Abell 13Low Stub1 January 2015Unsourced statements (January 2015)
Abell 2218Mid Stub1 October 2017Unsourced statements (October 2017)
Abell 2261Low Start1 November 2012References needed (November 2012)
Abell 2597Low Stub1 June 2016Expansion needed (June 2016)
Abell 2744 Y1Unknown Stub1 June 2015Orphaned (June 2015)
Abell 31Unknown Stub1 February 2014In-text citations lacking (February 2014)
Abell 7Low Start1 June 2017Dead external links (June 2017)
Abell 70Low Stub2 April 2017In-text citations lacking (April 2017), Unsourced statements (May 2017)
Abell 78Unknown Stub3 August 2016Sources lacking (August 2016), Dead external links (October 2016, September 2017)
Abolfadl HarawiUnknown Stub1 February 2009Sources lacking (February 2009)
Abraham bar HiyyaUnknown Start1 September 2015Links needing disambiguation (September 2015)
Abrams PlanetariumUnknown Start1 November 2011References needed (November 2011)
Absorption spectroscopyTop C1 August 2016Unsourced statements (August 2016)
Abundance of the chemical elementsHigh C1 April 2017Clarification needed (April 2017)
Abū Ishāq Ibrāhīm al-ZarqālīMid Start1 April 2014Unsourced statements (April 2014)
Academia Sinica Institute of Astronomy and AstrophysicsUnknown Start1 Coordinates needed
Accelerating expansion of the universeHigh C1 September 2016Page number citations needed (September 2016)
Accretion (astrophysics)High C1 January 2016Weasel-worded phrases (January 2016)
AchernarTop C2 May 2016Unsourced statements (May 2016, October 2016)
Achromatic telescopeUnknown Start1 December 2009References needed (December 2009)
Active SETILow Start3 January 2008Unsourced statements (January 2008), Style editing needed (October 2011), Merge needed (November 2016)
Active galactic nucleusTop B1 May 2015Weasel-worded phrases (May 2015)
Adam BurrowsLow Stub2 June 2014BLP articles lacking sources (June 2014), Incomplete lists (June 2014)
Adam FrankLow Start1 December 2016Unsourced statements (December 2016)
Adaptive opticsHigh C1 February 2010References needed (February 2010)
Adela RingueletLow Start1 March 2017Unsourced statements (March 2017)
Aditya-L1Low Start2 October 2010Dead external links (October 2010), Unsourced statements (August 2017)
Adler PlanetariumLow C2 April 2016References needed (April 2016), Promotional tone (April 2016)
Adolph Friedrich LindemannUnknown Stub1 August 2009Unsourced statements (August 2009)
Adrian MelottUnknown Start1 April 2010Unsourced statements (April 2010)
Adrien AuzoutMid Start2 June 2008References needed (June 2008), Unsourced statements (June 2013)
Advanced Camera for SurveysLow Start1 November 2016Dead external links (November 2016)
Advanced Composition ExplorerLow Start1 2017Potentially dated statements (2017)
Advanced LIGO Documentary ProjectLow Stub1 June 2016Orphaned (June 2016)
Advanced Technology Large-Aperture Space TelescopeMid C1 June 2014Unsourced statements (June 2014)
Aegir (moon)Low Stub1 June 2017Dead external links (June 2017)
Aeronautical and Space Medicine UnitLow Stub1 July 2009References needed (July 2009)
Age of the EarthHigh B2 October 2012References needed (October 2012), Unsourced statements (March 2015)
Age of the universeTop B2 February 2014Clarification needed (February 2014), Unsourced statements (April 2015)
Air-Breathing Electric PropulsionLow Stub1 October 2014Orphaned (October 2014)
Airborne observatoryMid Start2 December 2010References needed (December 2010), Unsourced statements (July 2012)
Akari (satellite)Low Start1 June 2017Dead external links (June 2017)
Akash Mitra MandalLow Start1 November 2010Orphaned (November 2010)
Al-BiruniLow B4 June 2011Expansion needed (June 2011), Spam cleanup (April 2017), External link cleanup (April 2017), Dead external links (May 2017)
Al-Dhira'Low Stub1 July 2017Unsourced statements (July 2017)
Al-Fadl ibn NaubakhtUnknown Stub1 February 2009Sources lacking (February 2009)
Alan Duffy (astronomer)Low C2 August 2017Citation with accessdate and no URL, Potentially dated statements (August 2017)
Alan GuthHigh B1 July 2014BLP articles lacking sources (July 2014)
Alan HoodMid Stub3 June 2009Notability unclear (June 2009), Reliable references lacking (February 2013), BLP articles lacking sources (February 2013)
Alan Turing BuildingLow Start3 December 2007Unsourced statements (December 2007), Dead external links (October 2010, June 2017)
AlbedoHigh B1 November 2013Unsourced statements (November 2013)
Albert MarthLow Stub1 January 2013References needed (January 2013)
Albertus Antonie NijlandMid Stub1 January 2016References needed (January 2016)
AldebaranHigh C3 March 2017Unsourced statements (March 2017, July 2017, September 2017)
Alden (crater)Low Start1 July 2009In-text citations lacking (July 2009)
Alder (crater)Low Start1 June 2016Unsourced statements (June 2016)
Alexander DalgarnoUnknown Start1 June 2017Dead external links (June 2017)
Alexander DubyagoUnknown Stub1 August 2008References needed (August 2008)
Alexander Nikolaevich DeutschLow Stub1 May 2009References needed (May 2009)
Alexander OllongrenUnknown Start1 February 2014BLP articles lacking sources (February 2014)
Alexander ThomLow C1 April 2011Unsourced statements (April 2011)
Alexander VyssotskyMid Start1 September 2009Sources lacking (September 2009)
Alfred BohrmannLow Stub1 August 2016Unsourced statements (August 2016)
Alfred McEwenUnknown Stub1 February 2016Incomplete lists (February 2016)
Alfred WegenerUnknown C3 January 2015References needed (January 2015), Unsourced statements (June 2015, July 2016)
AlgolTop GA1 July 2011Clarification needed (July 2011)
Algol paradoxLow Stub1 November 2012References needed (November 2012)
Ali QushjiLow Start1 January 2008References needed (January 2008)
Alice EverettUnknown Start1 January 2013In-text citations lacking (January 2013)
Alla MasevichUnknown Stub2 October 2016Notability unclear (October 2016), Unsourced statements (October 2016)
Allan Hills 84001High B3 March 2017CS1 errors: missing author or editor, CS1 errors: external links, Unsourced statements (March 2017)
Allen Telescope ArrayMid C7 October 2007Potentially dated statements (October 2007, June 2017), Dead external links (September 2014, November 2016), Clarification needed (March 2016, February 2016), Unsourced statements (July 2016)
AlmagestHigh B2 June 2009Unsourced statements (June 2009), Disputed statements (March 2011)
AlnilamMid C1 August 2015Unsourced statements (August 2015)
Alpha AraeMid C1 July 2010Unsourced statements (July 2010)
Alpha CassiopeiaeMid C1 December 2016Unsourced statements (December 2016)
Alpha CentauriTop B1 September 2014Unsourced statements (September 2014)
Alpha Centauri BcLow Stub1 July 2017Unsourced statements (July 2017)
Alpha Centauri in fictionLow Start1 CS1 errors: external links
Alpha CentauridsLow Stub1 February 2015References needed (February 2015)
Alpha PhoenicisMid C1 January 2012Unsourced statements (January 2012)
Alpha SagittariiMid Start1 July 2017Unsourced statements (July 2017)
Alpha Trianguli AustralisMid C1 October 2017Unsourced statements (October 2017)
Alpha processHigh Start2 January 2011Weasel-worded phrases (January 2011), References needed (March 2016)
Alphonse BorrellyLow Stub1 July 2015References needed (July 2015)
Alphonsus (crater)Low Start1 October 2012Unsourced statements (October 2012)
Amanda BauerLow B1 February 2015Potentially dated statements (February 2015)
Amateur Astronomers Association of PittsburghLow Stub1 February 2017Notability unclear (February 2017)
Amateur astronomyHigh C6 November 2013Expansion needed (November 2013), Unsourced statements (November 2016, September 2017), References needed (September 2017), Clarification needed (September 2017), Weasel-worded phrases (September 2017)
Amateur telescope makingMid B1 December 2008Unsourced statements (December 2008)
American Astronomical SocietyMid Start1 August 2017Dead external links (August 2017)
American Astronomical Society 215th meetingLow Start1 May 2011Unsourced statements (May 2011)
Amor asteroidLow Start3 May 2011References needed (May 2011), Unsourced statements (June 2013), Clarification needed (July 2017)
AnalemmaUnknown Start1 January 2009References needed (January 2009)
AnaximanderMid B3 March 2012Unsourced statements (March 2012), Disputed statements (October 2012, December 2015)
Ancient Greek astronomyMid C1 October 2011References needed (October 2011)
Anders Jonas ÅngströmMid Start1 June 2017Unsourced statements (June 2017)
Andreas Gerasimos MichalitsianosUnknown Start1 October 2011BLP articles lacking sources (October 2011)
Andrew Claude de la Cherois CrommelinUnknown Start1 December 2009References needed (December 2009)
Andrew LyneUnknown Start2 August 2016Unsourced statements (August 2016), Dead external links (July 2017)
Andromeda GalaxyTop GA5 April 2012Unsourced statements (April 2012, September 2016), Clarification needed (January 2016), Original research (October 2016), Failed verification (June 2017)
Andromeda IILow Start1 January 2008Unsourced statements (January 2008)
Andromeda VIIILow Stub1 December 2015References needed (December 2015)
Andromeda XLow Stub1 December 2015Sources lacking (December 2015)
Andromeda XVIIILow Stub1 September 2017Unsourced statements (September 2017)
Andromeda–Milky Way collisionLow Start1 April 2017References needed (April 2017)
AndromedidsLow Start1 CS1 errors: external links
Anglo-Australian Near-Earth Asteroid SurveyLow Stub1 February 2010Clarification needed (February 2010)
Angular diameterHigh Start2 September 2009References needed (September 2009), Links needing disambiguation (August 2017)
Angular resolutionHigh C1 January 2012References needed (January 2012)
Anlaug Amanda DjupvikLow Start1 June 2016References needed (June 2016)
Anna Estelle GlancyLow Stub1 Citation with accessdate and no URL
Annibale de GasparisLow Start1 June 2016Dead external links (June 2016)
Annie Jump CannonHigh C1 October 2016Unsourced statements (October 2016)
Annie Jump Cannon Award in AstronomyMid List1 January 2017Unsourced statements (January 2017)
Anomalous X-ray pulsarMid Stub1 2017Potentially dated statements (2017)
AntaresTop C1 October 2017Unsourced statements (October 2017)
Ante RadonićMid Start1 July 2017Dead external links (July 2017)
Antennae GalaxiesMid Start2 February 2007Unsourced statements (February 2007, September 2016)
Anthony AveniLow Stub2 2009Potentially dated statements (2009), BLP articles lacking sources (December 2015)
Anthropic principleLow B4 May 2009Reliable references lacking (May 2009), Accuracy disputes (May 2009), Original research (December 2010), Weasel-worded phrases (March 2016)
Anti-de Sitter spaceHigh Start2 June 2016In-text citations lacking (June 2016), Unsourced statements (August 2016)
Anticenter shellLow Start2 April 2008Expert attention needed (April 2008)
Antikythera mechanismLow B2 December 2014Unsourced statements (December 2014), Failed verification (September 2016)
Antimatter cometLow C3 February 2013Original research (February 2013), Conflict of interest (June 2014), Viewpoints needed (June 2014)
Antlia ClusterLow Start1 May 2015Clarification needed (May 2015)
Antoine Émile Henry LabeyrieMid Start4 June 2010Reliable references lacking (June 2010), BLP articles lacking sources (June 2010), Dead external links (October 2016, July 2017)
Antoniadi scaleUnknown Stub1 March 2014In-text citations lacking (March 2014)
Antonie PannekoekUnknown Start3 March 2010References needed (March 2010), Citation with accessdate and no URL, Clarification needed (March 2017)
Antonio AbettiLow Stub1 June 2008References needed (June 2008)
Antonio SantucciUnknown Stub1 February 2017Unsourced statements (February 2017)
Aperture masking interferometryMid C2 June 2015Reference cleanup (June 2015), Clarification needed (June 2015)
Aperture synthesisMid Start1 April 2011Sources lacking (April 2011)
Apocalypse of John – dated astronomicallyLow Start1 October 2016Dead external links (October 2016)
Apollo asteroidLow Start1 November 2016Potentially dated statements (November 2016)
Apparent longitudeLow Stub1 December 2014Orphaned (December 2014)
Apparent retrograde motionHigh Start2 Web citation with no URL, Citation with accessdate and no URL
AppulseUnknown Stub2 April 2017Weasel-worded phrases (April 2017), Unsourced statements (April 2017)
ApsisMid B1 January 2017References needed (January 2017)
Aquarius (constellation)Top C1 2002Potentially dated statements (2002)
Aquila (constellation)Top Start3 November 2009References needed (November 2009), Unsourced statements (March 2011, November 2015)
Aratus (crater)Low Start1 May 2012In-text citations lacking (May 2012)
Araucaria ProjectUnknown Stub1 December 2014Orphaned (December 2014)
ArchaeoastronomyHigh GA2 July 2012Unsourced statements (July 2012, March 2014)
Archimedes (crater)Low Start1 October 2012In-text citations lacking (October 2012)
ArcturusTop C2 September 2014Unsourced statements (September 2014, January 2015)
Arecibo ObservatoryMid B1 October 2016Dead external links (October 2016)
Argo NavisLow Start1 July 2017Unsourced statements (July 2017)
Argunov–Cassegrain telescopeLow Stub1 September 2011Unsourced statements (September 2011)
Armagh ObservatoryMid Start2 April 2017Reliable references lacking (April 2017), References needed (April 2017)
Armillary sphereLow B2 May 2010Unsourced statements (May 2010, May 2015)
Arnold O. BenzUnknown Start1 October 2016Orphaned (October 2016)
Arp 104Low Stub1 July 2017Dead external links (July 2017)
Arp 147Unknown Start1 Citation with format and no URL
Arp 187Low Stub1 October 2016Dead external links (October 2016)
Arp 220Mid Start2 July 2017CS1 errors: external links, Dead external links (July 2017)
Arp 299Low Stub1 April 2012Clarification needed (April 2012)
Array of Low Energy X-ray Imaging SensorsLow Stub1 July 2015Unsourced statements (July 2015)
Arthur AuwersMid Stub2 April 2011In-text citations lacking (April 2011), Expansion needed (March 2017)
Arthur EddingtonHigh B3 October 2010Unsourced statements (October 2010, December 2016), References needed (May 2016)
Arthur Francis O'Donel AlexanderUnknown Stub1 November 2016In-text citations lacking (November 2016)
Arthur Matthew Weld DowningLow Start1 Web citation with no URL
AryabhataHigh B1 March 2017References needed (March 2017)
Asada GoryuLow Stub1 May 2014References needed (May 2014)
Asantha CoorayUnknown Start1 October 2016Dead external links (October 2016)
Asaph HallMid C1 January 2014Unsourced statements (January 2014)
Asemane shabBottom Start1 May 2010Orphaned (May 2010)
Aspects of VenusLow Start2 July 2009Sources lacking (July 2009), Introduction cleanup (March 2017)
Aspera European Astroparticle networkLow Start3 May 2009Cleanup needed (May 2009, May 2009), References needed (September 2014)
Association (astronomy)Low Start1 January 2010Clarification needed (January 2010)
Association in Scotland to Research into AstronauticsBottom Start5 February 2012Unsourced statements (March 2012, February 2012), References needed (February 2012), Clarification needed (March 2012), Vague or ambiguous geographic scope (March 2012)
Asterism (astronomy)Mid B3 February 2010Unsourced statements (February 2010, July 2017), References needed (July 2017)
AsteroidTop B1 June 2016Potentially dated statements (June 2016)
Asteroid Redirect MissionLow C1 January 2016Potentially dated statements (January 2016)
Asteroid Terrestrial-impact Last Alert SystemLow Stub1 February 2016Update needed (February 2016)
Asteroid ZooUnknown Stub2 February 2015In-text citations lacking (February 2015), Notability unclear (February 2015)
Asteroid beltTop FA1 2006Potentially dated statements (2006)
Asteroid captureLow Start1 June 2011References needed (June 2011)
Astro artBottom Start3 September 2011Orphaned (September 2011), Notability unclear (September 2011), NPOV disputes (September 2011)
Astro microbiologyMid C2 May 2016Reliable references lacking (July 2016), References needed (May 2016)
Astro-combLow Stub1 November 2010Update needed (November 2010)
AstrobiologyTop B1 2017Potentially dated statements (2017)
AstroecologyMid Start3 July 2010Unsourced statements (September 2012), Style editing needed (July 2010), Original research (June 2012)
AstrographLow Start3 May 2014References needed (May 2014), Unsourced statements (July 2016), Dead external links (October 2016)
AstrolabeLow C1 October 2016Dead external links (October 2016)
AstrolinguisticsLow Start1 November 2014In-text citations lacking (November 2014)
Astrology and astronomyMid Start2 November 2012Unsourced statements (November 2012), Dead external links (October 2016)
AstrometryTop C1 August 2009Clarification needed (August 2009)
AstronariumLow Start1 October 2016Orphaned (October 2016)
AstronautMid C1 November 2016Potentially dated statements (November 2016)
AstronetLow Start1 October 2016Dead external links (October 2016)
Astronomer RoyalLow Start1 March 2011References needed (March 2011)
Astronomia novaHigh Start2 December 2010Reliable references lacking (December 2010), Unsourced statements (September 2016)
Astronomia.plLow Stub1 September 2016Notability unclear (September 2016)
Astronomical Image Processing SystemUnknown Start1 August 2016References needed (August 2016)
Astronomical LeagueLow Start1 August 2017Unsourced statements (August 2017)
Astronomical Society of GlasgowLow Stub1 June 2013Reliable references lacking (June 2013)
Astronomical Society of New South WalesLow C6 1998Potentially dated statements (1998, January 2009, June 2014), Reliable references lacking (March 2016), Cleanup needed (March 2016, March 2016)
Astronomical Society of the PacificHigh Start2 March 2014Unsourced statements (February 2015), References needed (March 2014)
Astronomical algorithmMid Stub1 April 2010Sources lacking (April 2010)
Astronomical artBottom Start1 April 2013References needed (April 2013)
Astronomical bodies in pseudoscience and the paranormalBottom List5 August 2010References needed (August 2010), Original research (August 2010), Reference cleanup (August 2010), Notability unclear (August 2010), Orphaned (October 2017)
Astronomical catalogMid Start1 September 2010Unsourced statements (September 2010)
Astronomical complexLow C1 Citation with accessdate and no URL
Astronomical constantHigh Start1 February 2013Obsolete information (February 2013)
Astronomical interferometerHigh C3 October 2016Dead external links (October 2016, August 2017, September 2017)
Astronomical optical interferometryUnknown Start3 February 2011Vague or ambiguous time (February 2011), In-text citations lacking (August 2014), Introduction cleanup (December 2016)
Astronomical radio sourceLow Start2 October 2016Unsourced statements (October 2016), Weasel-worded phrases (October 2016)
Astronomical ringsLow Start1 December 2016Clarification needed (December 2016)
Astronomical seeingHigh C4 January 2011Unsourced statements (January 2011, November 2016), Dead external links (August 2016, March 2017)
Astronomical spectroscopyHigh B1 October 2016Dead external links (October 2016)
Astronomical surveyMid B2 July 2011Unsourced statements (July 2011), References needed (July 2011)
Astronomical system of unitsHigh Start3 February 2013Obsolete information (February 2013), Unsourced statements (July 2015), Accuracy disputes (November 2015)
Astronomical unitHigh B5 2012Potentially dated statements (2012, 2014, April 2017, September 2017), DOIs inactive (2017)
AstronomyTop GA1 August 2017Dead external links (August 2017)
Astronomy & GeophysicsLow Start1 November 2016Potentially dated statements (November 2016)
Astronomy (magazine)Low Start2 January 2008References needed (October 2009), Unsourced statements (January 2008)
Astronomy CastBottom Start1 July 2008Reliable references lacking (July 2008)
Astronomy DayLow Start1 December 2014References needed (December 2014)
Astronomy IrelandLow Start3 October 2010Unsourced statements (October 2010, March 2014), Clarification needed (February 2011)
Astronomy NorthLow Stub3 February 2012Reliable references lacking (February 2012), References needed (February 2012), Orphaned (December 2014)
Astronomy NowLow Start5 November 2012References needed (November 2012), Unsourced statements (November 2012), External link cleanup (November 2012), Spam cleanup (November 2012), Conflict of interest (November 2012)
Astronomy in the medieval Islamic worldMid B5 April 2010Reliable references lacking (April 2010), Unsourced statements (April 2016, June 2017), CS1 errors: dates, Weasel-worded phrases (November 2016)
AstrooceanographyUnknown Stub1 March 2015Orphaned (March 2015)
Astroparticle Physics (journal)Unknown Stub1 Citation with accessdate and no URL
Astrophysical jetMid Start2 February 2017Clarification needed (February 2017), Unsourced statements (February 2017)
Astrophysical maserHigh C1 October 2011Unsourced statements (October 2011)
Astrophysical plasmaLow Stub2 December 2015Unsourced statements (December 2015), References needed (February 2017)
AstrophysicsTop C1 September 2017Factual verification needed (September 2017)
Astrophysics Source Code LibraryLow Start1 CS1 errors: external links
AstropyUnknown Start2 July 2017Prose needed (July 2017), Cleanup needed (July 2017)
Atacama Large Millimeter ArrayLow C1 2014Potentially dated statements (2014)
Atira asteroidLow Start1 November 2016Unsourced statements (November 2016)
Atlas 3d surveyLow Stub1 June 2013Sources lacking (June 2013)
Atlas of Peculiar GalaxiesMid List1 March 2007Unsourced statements (March 2007)
Atmosphere of TitanMid B5 January 2014Expert attention needed (January 2014), Unsourced statements (May 2015), Too technical (January 2014), Disputed statements (May 2015)
Atmosphere of VenusMid GA3 October 2012Unsourced statements (October 2012, February 2016, June 2014)
Atmospheric refractionUnknown Start2 May 2016Unsourced statements (May 2016), CS1 errors: chapter ignored
August Nathanael GrischowLow Stub2 March 2013Cleanup needed (March 2013, March 2013)
Auguste CharloisLow Stub1 August 2016Unsourced statements (August 2016)
Aurora MaxBottom Stub1 April 2017Reliable references lacking (April 2017)
Auroral kilometric radiationLow Stub1 December 2009Unsourced statements (December 2009)
Australian Square Kilometre Array PathfinderLow Start1 October 2016Clarification needed (October 2016)
Averted visionLow Start4 October 2010Weasel-worded phrases (October 2010, November 2011, January 2016), Unsourced statements (January 2016)
Avogadro (crater)Low Start1 December 2014In-text citations lacking (December 2014)
Axial precessionHigh B4 January 2015Unsourced statements (January 2015, November 2016, January 2017), References needed (September 2017)
Axis of evil (cosmology)Mid Start2 February 2016Introduction cleanup (February 2016), Context needed (February 2016)
B CentauriLow Stub1 December 2016References needed (December 2016)
B-type asteroidLow Stub1 November 2015References needed (November 2015)
BAT99-98Low Start1 July 2015Unsourced statements (July 2015)
BD CamelopardalisMid Start1 September 2010In-text citations lacking (September 2010)
BDF-3299Unknown Stub1 October 2015Sources lacking (October 2015)
BHR 71Low Stub1 December 2014Orphaned (December 2014)
BI 253Low Start1 May 2017Unsourced statements (May 2017)
BKL singularityHigh C4 April 2016Expert attention needed (April 2016), Citation lacking title, Too technical (April 2016)
BL Lacertae objectMid Start1 February 2010References needed (February 2010)
BOSS Great WallMid Stub1 March 2016References needed (March 2016)
BP BoötisLow Stub1 September 2010References needed (September 2010)
BQ OctantisLow Stub1 March 2016References needed (March 2016)
BRRISONLow Start1 October 2016Dead external links (October 2016)
BT MonocerotisMid Start2 February 2010Unsourced statements (February 2010, April 2017)
BX BoötisLow Stub1 August 2017References needed (August 2017)
Baade's WindowBottom Stub1 October 2016Dead external links (October 2016)
Babylonian astrologyLow Start2 January 2011Unsourced statements (October 2011), In-text citations lacking (January 2011)
Babylonian astronomyMid C2 November 2012References needed (November 2012), Accuracy disputes (June 2013)
Background radiationMid C5 April 2011Unsourced statements (December 2012, November 2013), Accuracy disputes (April 2011), Reliable references lacking (December 2012), Failed verification (April 2011)
Balfour StewartLow Start2 June 2009Style editing needed (April 2011, June 2009)
Balmer (crater)Low Start1 November 2009In-text citations lacking (November 2009)
Bandwidth smearingLow Stub3 July 2012Expert attention needed (July 2012), Too technical (July 2012)
Bareket ObservatoryLow Start4 October 2009Expert attention needed (October 2009), Reliable references lacking (October 2009), Unsourced statements (August 2014)
Barred lenticular galaxyMid Stub1 December 2009Sources lacking (December 2009)
Bartholomäus ScultetusUnknown Stub1 June 2012Expansion needed (June 2012)
Barycentric Julian DateLow Start1 June 2014In-text citations lacking (June 2014)
Baryon acoustic oscillationsMid C4 September 2011Expert attention needed (September 2011), Too technical (September 2011), Clarification needed (August 2015)
Baryonic dark matterLow Start1 February 2010Clarification needed (February 2010)
Bashir SyedLow Start3 November 2009Cleanup needed (November 2009, November 2009), Dead external links (October 2016)
Bastille Day eventLow Stub3 June 2014Expert attention needed (June 2014), Too technical (June 2014)
Bayer designationMid Start2 March 2009References needed (March 2009), Web citation with no URL
Be/X-ray binaryMid Stub1 September 2009References needed (September 2009)
Beatrice M. Tinsley PrizeMid List1 April 2009Sources lacking (April 2009)
Beatrice TinsleyMid C3 October 2016Dead external links (October 2016, July 2017), References needed (August 2017)
Becklin–Neugebauer ObjectMid Start1 July 2013In-text citations lacking (July 2013)
Becquerel (lunar crater)Low Start1 November 2014In-text citations lacking (November 2014)
Beehive ClusterMid Start1 April 2017Unsourced statements (April 2017)
Beijing Ancient ObservatoryUnknown Start1 November 2012Unsourced statements (November 2012)
Beijing Schmidt CCD Asteroid ProgramLow Stub2 October 2016Dead external links (October 2016), Unsourced statements (November 2016)
Belgrade ObservatoryMid Start1 July 2017Merge needed (July 2017)
Belgrade PlanetariumLow Stub1 Coordinates needed
Belt of VenusLow Stub1 September 2015References needed (September 2015)
Bengt StrömgrenUnknown Start1 September 2014References needed (September 2014)
Benjamin BaillaudMid Start1 June 2008References needed (June 2008)
Benjamin BannekerLow B2 Web citation with no URL, Citation with accessdate and no URL
BeppoSAXLow Start1 March 2013In-text citations lacking (March 2013)
Bergelmir (moon)Low Stub1 July 2017Dead external links (July 2017)
Berlin ObservatoryLow Start2 October 2016Dead external links (October 2016, November 2016)
Bestla (moon)Low Stub1 July 2017Dead external links (July 2017)
Beta AraeMid C1 August 2013Reliable references lacking (August 2013)
Beta ArietisMid C1 December 2011Unsourced statements (December 2011)
Beta Canis MajorisMid C1 January 2012Unsourced statements (January 2012)
Beta LupiMid C1 January 2012Unsourced statements (January 2012)
Beta LyraeHigh C1 March 2016Unsourced statements (March 2016)
Beta OphiuchiMid C1 January 2012Unsourced statements (January 2012)
Beta PictorisHigh GA1 July 2017Dead external links (July 2017)
Beta Pictoris bUnknown Start1 2015Potentially dated statements (2015)
Beta Piscis AustriniLow Start2 October 2016Dead external links (October 2016), Reliable references lacking (May 2017)
Beta SagittariiNA Disambig1 October 2016Unsourced statements (October 2016)
Beta ScorpiiMid C1 May 2017Unsourced statements (May 2017)
Beta Ursae MajorisMid C1 September 2017Unsourced statements (September 2017)
BetelgeuseTop FA2 October 2017Dead external links (October 2017), Unsourced statements (October 2017)
Beyond Einstein programMid Stub1 May 2013Update needed (May 2013)
Bhāskara IUnknown Start2 May 2010Disputed statements (May 2010), Unsourced statements (March 2014)
Bibliography of encyclopedias: astronomy and astronomersLow List1 September 2012Incomplete lists (September 2012)
Biela's CometLow C2 December 2016Unsourced statements (December 2016), Clarification needed (December 2016)
Big BangTop FA1 October 2017Weasel-worded phrases (October 2017)
Big Bang nucleosynthesisHigh B7 January 2015Unsourced statements (January 2015, March 2015, March 2017), In-text citations lacking (March 2017), References needed (March 2017), Self-contradictory articles (March 2017), Clarification needed (March 2017)
Big BounceHigh C6 February 2012Unsourced statements (February 2012), Cleanup needed (December 2016), Vague or ambiguous time (December 2016), Prose needed (December 2016), Weasel-worded phrases (December 2016), Clarification needed (December 2016)
Big DipperHigh C3 March 2017Unsourced statements (March 2017, April 2017), Reliable references lacking (April 2017)
Big RipTop C2 November 2015Update needed (November 2015), Clarification needed (December 2016)
Binary black holeLow Start1 2011Potentially dated statements (2011)
Binary starTop B2 July 2012References needed (July 2012), Dead external links (July 2017)
Birkhoff (crater)Low Start1 July 2011In-text citations lacking (July 2011)
Birmingham Astronomical SocietyLow Start2 August 2009Sources lacking (August 2009), Dead external links (November 2016)
Bisei Spaceguard CenterLow Start1 November 2016Unsourced statements (November 2016)
Black holeTop GA4 April 2015Unsourced statements (April 2015, September 2017), Clarification needed (July 2015, February 2016)
Black holes in fictionLow Start2 February 2013Style editing needed (February 2013), References needed (April 2015)
Black star (semiclassical gravity)Low Start1 September 2010In-text citations lacking (September 2010)
BlackGEMLow Start1 November 2013Orphaned (November 2013)
Blandford–Znajek processLow Stub1 September 2016Reliable references lacking (September 2016)
BlazarTop C1 June 2017References needed (June 2017)
Blink comparatorLow Stub1 May 2007References needed (May 2007)
Blue giantHigh C1 April 2016Unsourced statements (April 2016)
Bohdan PaczyńskiMid Start1 November 2016Dead external links (November 2016)
Bok (lunar crater)Low Start1 November 2007Sources lacking (November 2007)
Bok globuleHigh Start1 January 2017Failed verification (January 2017)
Boltzmann (crater)Low Start1 February 2008Unsourced statements (February 2008)
Bond albedoMid Start1 December 2008References needed (December 2008)
Bonnard J. TeegardenMid Start1 January 2016Reliable references lacking (January 2016)
Boris (crater)Low Start1 December 2009References needed (December 2009)
Boswell ObservatoryLow Stub1 December 2009Sources lacking (December 2009)
Boyden ObservatoryLow Start1 January 2012Unsourced statements (January 2012)
BoötesTop B1 URL error
Boötes I (dwarf galaxy)Low Stub1 February 2007Unsourced statements (February 2007)
Bradley SchaeferUnknown Start1 November 2016Dead external links (November 2016)
BrahmaguptaUnknown C7 November 2015Merge needed (November 2015), Reliable references lacking (November 2015), Clarification needed (November 2015, June 2017), Expansion needed (July 2016), Unsourced statements (June 2017), Page number citations needed (June 2017)
Breakthrough StarshotLow C1 August 2017Unsourced statements (August 2017)
BremsstrahlungMid C3 December 2012Unsourced statements (December 2012), Clarification needed (May 2016), Dead external links (July 2017)
Brian Cox (physicist)Low C3 January 2016Unsourced statements (July 2016), Update needed (January 2016), Vague or ambiguous time (February 2017)
Brian J. BoyleUnknown Start1 November 2016Unsourced statements (November 2016)
Brian MayLow C3 September 2010Dead external links (September 2010, June 2015), Unsourced statements (July 2017)
Brian SchmidtHigh Start1 March 2015Unsourced statements (March 2015)
Brightness temperatureMid Start5 October 2008References needed (October 2008), In-text citations lacking (August 2013), Original research (August 2015), Unsourced statements (August 2015), Dead external links (July 2017)
British television Apollo 11 coverageBottom B1 October 2010Dead external links (October 2010)
Brown (crater)Low Start1 October 2017In-text citations lacking (October 2017)
Brown dwarfTop B6 August 2008Incomplete lists (August 2008), Potentially dated statements (2013), Unsourced statements (June 2013, April 2013), Dead external links (November 2016, March 2017)
Brown-dwarf desertMid Start1 January 2012Unsourced statements (January 2012)
Bruce HapkeMid Start1 April 2012Weasel-worded phrases (April 2012)
Bruce MedalHigh List1 December 2015Reliable references lacking (December 2015)
Bruno Rossi PrizeMid List1 June 2014References needed (June 2014)
Bullet GroupUnknown Stub1 January 2015References needed (January 2015)
Butterfly ClusterMid Start1 August 2015Unsourced statements (August 2015)
Buzzard Coulee meteoriteLow C1 October 2010Dead external links (October 2010)
C-type asteroidMid Start2 June 2010References needed (June 2010), Unsourced statements (February 2012)
C/1652 Y1Low Stub1 June 2008Potentially dated statements (June 2008)
C/1760 A1Low Stub2 June 2008Potentially dated statements (June 2008), References needed (August 2010)
C/2002 V1 (NEAT)Low Start1 December 2011Orphaned (December 2011)
C/2006 P1Mid C1 January 2017Unsourced statements (January 2017)
C/2009 R1Low Start1 December 2010Update needed (December 2010)
C/2012 S4Unknown Stub1 February 2017Clarification needed (February 2017)
C/2013 A1Mid B1 September 2015Update needed (September 2015)
C/2013 UQ4 (Catalina)Unknown Stub1 July 2014Orphaned (July 2014)
C/2014 G3Unknown Stub1 December 2014Orphaned (December 2014)
C/2015 ER61 (PANSTARRS)Unknown Start1 March 2017Unsourced statements (March 2017)
C/2015 F5 (SWAN-XingMing)Unknown Stub1 January 2016Wikilinks needed (January 2016)
CK VulpeculaeLow Start2 March 2016References needed (March 2016), Unsourced statements (February 2017)
CMB cold spotMid Start4 January 2013Unsourced statements (January 2013, September 2013, February 2013), Clarification needed (December 2013)
COARTUnknown Stub1 September 2014References needed (September 2014)
COROTMid Start1 May 2016Update needed (May 2016)
COROT-2Low Start1 July 2017Dead external links (July 2017)
COROT-3bMid Start1 July 2017Dead external links (July 2017)
COSMOSOMASLow Stub1 Coordinates needed
CXOU J061705.3+222127Low Stub1 CS1 errors: dates
Caelum SuperclusterLow Stub1 July 2017References needed (July 2017)
Caesar's CometLow Start1 September 2015Unsourced statements (September 2015)
CalSkyLow Stub1 Citation lacking title
Calabash NebulaMid Start1 February 2007Unsourced statements (February 2007)
Calar Alto Legacy Integral Field Area SurveyUnknown Start2 January 2015References needed (January 2015), Wikilinks needed (May 2015)
Caleb ScharfUnknown Stub3 April 2015Incomplete lists (April 2015), Vague or ambiguous time (August 2016), BLP articles lacking sources (February 2017)
Cambridge InterferometerMid Stub1 October 2015Sources lacking (October 2015)
CamelopardalisMid Start1 February 2009Expansion needed (February 2009)
Cameron (crater)Low Start1 June 2017In-text citations lacking (June 2017)
Campanus (crater)Low Start1 April 2009In-text citations lacking (April 2009)
Cancer (constellation)Mid C2 2002Potentially dated statements (2002), Unsourced statements (December 2008)
CanopusTop C2 February 2012Unsourced statements (February 2012), Disputed statements (June 2012)
Canopus Hill ObservatoryLow Stub1 October 2015Sources lacking (October 2015)
Cape York meteoriteUnknown Start1 November 2016Dead external links (November 2016)
CapellaTop FA1 September 2017Dead external links (September 2017)
Carbon planetLow Start1 October 2017Unsourced statements (October 2017)
Carbon starMid C1 August 2016Expansion needed (August 2016)
Carey maskLow Stub1 July 2009Sources lacking (July 2009)
Carina (constellation)Top Start3 December 2011Unsourced statements (July 2012), Clarification needed (December 2011), Page number citations needed (July 2012)
Carina NebulaHigh C1 1998Potentially dated statements (1998)
Carina OB1Low Stub1 December 2016References needed (December 2016)
Carina–Sagittarius ArmHigh Start1 November 2016Dead external links (November 2016)
Carl August von SteinheilLow Start1 December 2012Clarification needed (December 2012)
Carl Friedrich GaussMid B3 July 2007Unsourced statements (July 2007), References needed (July 2012), Dead external links (June 2017)
Carl SaganMid B4 September 2013Unsourced statements (September 2013), Clarification needed (October 2014, March 2016), Factual verification needed (September 2013)
Carlos FrenkMid Stub1 May 2015BLP articles lacking sources (May 2015)
Carlyle Smith BealsUnknown Stub1 November 2016Dead external links (November 2016)
Carole JordanMid Start4 October 2009Unsourced statements (October 2009), In-text citations lacking (October 2009), BLP articles lacking sources (October 2009, November 2012)
Caroline HerschelLow Start1 June 2017Unsourced statements (June 2017)
Carolyn PorcoMid B1 Web citation with no URL
Cartes du CielBottom Stub1 January 2009References needed (January 2009)
Cassiopeia (constellation)Top C1 December 2016Unsourced statements (December 2016)
Catalina StationLow Start1 August 2017Dead external links (August 2017)
Catalogue of rotational velocities of the starsLow Stub1 August 2017Dead external links (August 2017)
Cayrel's StarUnknown Start1 June 2013In-text citations lacking (June 2013)
CelestiaLow C1 April 2011References needed (April 2011)
Celestial Sphere Woodrow Wilson MemorialBottom C1 January 2011In-text citations lacking (January 2011)
Celestial cartographyMid Start3 June 2008Unsourced statements (January 2009), Expansion needed (June 2008), References needed (August 2010)
Celestial eventLow Stub1 September 2014References needed (September 2014)
Celestial mechanicsTop C2 April 2011References needed (April 2011, June 2013)
Celestial navigationMid C3 September 2011References needed (September 2011), Unsourced statements (September 2011, December 2012)
CelestronLow Start2 February 2011Unsourced statements (February 2011), Clarification needed (February 2011)
Centennial PlanetariumLow Start1 November 2016In-text citations lacking (November 2016)
Central Bureau for Astronomical TelegramsMid Start1 January 2016Clarification needed (January 2016)
Central meridian (planets)Unknown Stub1 February 2015References needed (February 2015)
Cernan Earth and Space CenterLow Stub1 August 2017Sources lacking (August 2017)
Cerro Tololo Inter-American ObservatoryMid Start1 August 2017Dead external links (August 2017)
Cha 110913-773444Mid Stub1 January 2017References needed (January 2017)
Chamberlin–Moulton planetesimal hypothesisLow Start1 October 2009References needed (October 2009)
Chandra WickramasingheUnknown Start4 July 2013Unsourced statements (August 2013, February 2016), Conflict of interest (July 2013), Failed verification (August 2013)
Chandra X-ray ObservatoryHigh C1 2017Potentially dated statements (2017)
Chang'e 1Low Start1 Citation with accessdate and no URL
Chang'e 5Low Stub1 October 2014Unsourced statements (October 2014)
Channel 37Bottom Start2 November 2016Dead external links (November 2016, December 2016)
Chaotic rotationUnknown Stub2 September 2016Orphaned (September 2016), Failed verification (May 2017)
Charles A. BeichmanLow Stub2 January 2017Unreviewed new articles (January 2017), BLP articles lacking sources (January 2017)
Charles Dillon PerrineUnknown Stub1 February 2012References needed (February 2012)
Charles Edward BarnsUnknown C2 Web citation with no URL, Citation with accessdate and no URL
Charles ElmerLow Start1 October 2010Dead external links (October 2010)
Charles Fehrenbach (astronomer)Unknown Stub1 December 2009Sources lacking (December 2009)
Charles H. TownesUnknown Start2 March 2016Unsourced statements (March 2016, July 2017)
Charles MalapertMid Stub1 May 2014In-text citations lacking (May 2014)
Charles MeldrumLow Start1 Citation with accessdate and no URL
Charles P. de Saint-AignanLow Stub1 March 2015Dead external links (March 2015)
Charles Piazzi SmythUnknown Start1 October 2011References needed (October 2011)
Charles R. AlcockLow Stub2 April 2011BLP articles lacking sources (April 2011), Dead external links (November 2016)
Charon (moon)Mid B2 June 2017CS1 errors: missing author or editor, References needed (June 2017)
Chassigny (meteorite)Low Stub1 Coordinates needed
Chicago Air Shower ArrayMid Stub1 December 2009Sources lacking (December 2009)
Chinese Future Giant TelescopeUnknown Stub1 December 2014Orphaned (December 2014)
Chinese Giant Solar TelescopeLow Stub2 October 2015References needed (October 2015), Dead external links (August 2017)
Chinese constellationsLow Start2 April 2015Unsourced statements (April 2015), Clarification needed (April 2015)
Chinese star mapsLow Start3 September 2011Unsourced statements (September 2011), References needed (April 2015), Dead external links (April 2015)
Chiron (hypothetical moon)Low Stub1 January 2016Sources lacking (January 2016)
Chris ImpeyUnknown Start1 February 2017In-text citations lacking (February 2017)
Chris LintottUnknown Start4 June 2014Unsourced statements (October 2014, June 2014, January 2015), Citation with accessdate and no URL
Christen Sørensen LongomontanusUnknown Start1 November 2009Unsourced statements (November 2009)
Christiaan HuygensMid B1 April 2017Introduction cleanup (April 2017)
Christian Heinrich Friedrich PetersLow Start1 June 2016Unsourced statements (June 2016)
Christian Ludwig IdelerLow Start2 February 2012In-text citations lacking (February 2012, July 2014)
Christine Wilson (scientist)Low Stub1 May 2017Orphaned (May 2017)
Christoph ScheinerMid B1 May 2014References needed (May 2014)
Christopher AikmanLow Stub1 March 2016BLP articles lacking sources (March 2016)
Christopher ClaviusMid C1 August 2017Dead external links (August 2017)
Christopher ConseliceMid Stub2 May 2016Unsourced statements (May 2016), Vague or ambiguous time (May 2016)
Christopher HansteenUnknown B1 March 2009Unsourced statements (March 2009)
Christopher McKeeUnknown Start1 February 2013In-text citations lacking (February 2013)
ChromosphereMid Start2 August 2009References needed (August 2009), Dead external links (May 2012)
ChronocinematographUnknown Stub1 June 2017In-text citations lacking (June 2017)
Chronology of the universeHigh C2 October 2016CS1 errors: chapter ignored, Self-contradictory articles (October 2016)
Chthonian planetMid Stub1 November 2016Clarification needed (November 2016)
CircinusMid FA1 September 2017Dead external links (September 2017)
Circumbinary planetLow B1 May 2017Reliable references lacking (May 2017)
Circumstellar habitable zoneMid B3 November 2016Citation with accessdate and no URL, Dead external links (November 2016, September 2017)
Classical Cepheid variableHigh C1 May 2016Unsourced statements (May 2016)
Cleopatra (crater)Low Start1 Citation with accessdate and no URL
ClickworkersLow Start3 2007Potentially dated statements (2007), Update needed (May 2017), References needed (May 2017)
Clifford CunninghamLow Stub1 June 2017BLP articles lacking sources (June 2017)
Cloudcroft ObservatoryLow Start1 April 2013Potentially dated statements (April 2013)
Clover (telescope)Low Start1 Coordinates needed
Clyde TombaughMid B3 July 2015Citation lacking title, Unsourced statements (July 2015, December 2015)
Co-orbital configurationLow Start1 2015Potentially dated statements (2015)
CoKu Tau/4Low Stub2 April 2017In-text citations lacking (April 2017), Dead external links (August 2017)
CoRoT-2bLow Start2 August 2017CS1 errors: external links, Dead external links (August 2017)
Coalsack NebulaMid Start1 October 2012Reliable references lacking (October 2012)
Cointe ObservatoryLow Stub2 May 2010Expansion needed (May 2010), Dead external links (August 2017)
Colaba ObservatoryLow C3 March 2013Unsourced statements (May 2014), In-text citations lacking (March 2013), Clarification needed (May 2014)
Cold trap (astronomy)Mid Stub1 June 2017Unsourced statements (June 2017)
Colin Stanley GumMid Stub1 December 2015References needed (December 2015)
CollapsarNA Disambig1 August 2017Sources lacking (August 2017)
Coma ClusterHigh Start1 August 2017Dead external links (August 2017)
CometTop GA3 2013Potentially dated statements (2017, 2013, November 2014)
Comet GalaxyUnknown Stub1 February 2014In-text citations lacking (February 2014)
Comet LulinLow C1 August 2017Dead external links (August 2017)
Comet PojmańskiLow Stub1 March 2015References needed (March 2015)
Comet StonehouseLow Stub1 September 2014References needed (September 2014)
Comet WestLow Start1 October 2016Unsourced statements (October 2016)
Comet de VicoLow Stub2 August 2010Expert attention needed (August 2010)
Comet dustLow Start1 December 2006References needed (December 2006)
Commensurability (astronomy)Low Stub1 December 2009Sources lacking (December 2009)
Commission for Dark SkiesMid Start1 August 2009References needed (August 2009)
Communication with extraterrestrial intelligenceUnknown Start4 March 2009Clarification needed (March 2009), Unsourced statements (March 2009), References needed (July 2015), CS1 errors: external links
Comoving and proper distancesMid Start2 August 2012Reference cleanup (August 2012), CS1 errors: dates
Compact starHigh Start4 June 2008References needed (June 2008), Unsourced statements (July 2008, March 2014, May 2017)
Compton Gamma Ray ObservatoryHigh Start1 July 2014Unsourced statements (July 2014)
Compton scatteringMid Start1 April 2013Clarification needed (April 2013)
Confederation of Indian Amateur AstronomersLow Start2 August 2009References needed (August 2009, July 2010)
Conon (crater)Low Start1 May 2012In-text citations lacking (May 2012)
Constantinople Observatory of Taqi ad-DinLow Stub1 Coordinates needed
ConstellationTop C2 August 2016Spam cleanup (August 2016), Unsourced statements (July 2017)
Constellation familyBottom Start1 July 2012Limited geographic scope (July 2012)
Controversy over the discovery of HaumeaMid GA1 2008Potentially dated statements (2008)
Copernican principleHigh Start4 April 2017Expert attention needed (June 2017), Clarification needed (April 2017), Accuracy disputes (June 2017)
Copernicus (lunar crater)Low Start1 October 2012Unsourced statements (October 2012)
Copernicus Foundation for Polish AstronomyLow Stub2 August 2010Sources lacking (August 2010), Notability unclear (August 2010)
Cornelis Johannes van HoutenLow Start1 July 2008References needed (July 2008)
CoronaHigh C1 July 2016Unsourced statements (July 2016)
Coronal mass ejectionHigh C3 November 2011Unsourced statements (November 2011, July 2016), Potentially dated statements (2016)
Coronal radiative lossesMid C3 March 2011Expert attention needed (March 2011), Too technical (March 2011)
Coronal rainLow Stub1 May 2013Orphaned (May 2013)
Corotation circleLow Stub1 April 2014Orphaned (April 2014)
Cosmic Background ImagerMid Start1 Coordinates needed
Cosmic HorseshoeLow Start2 September 2014References needed (September 2014), CS1 errors: dates
Cosmic age problemUnknown C1 May 2014Unsourced statements (May 2014)
Cosmic background radiationUnknown Start1 March 2017Clarification needed (March 2017)
Cosmic caterpillarLow Stub1 December 2014Orphaned (December 2014)
Cosmic crystallographyMid Stub3 April 2012References needed (January 2015), Orphaned (April 2012), Unsourced statements (January 2016)
Cosmic distance ladderTop C5 September 2011Unsourced statements (September 2011, July 2014), Clarification needed (August 2015, July 2017), Expansion needed (October 2017)
Cosmic dustMid C1 March 2011Unsourced statements (March 2011)
Cosmic microwave backgroundTop B5 September 2011Expert attention needed (September 2011), Too technical (September 2011), Clarification needed (January 2013), Unsourced statements (August 2017)
Cosmic rayTop B2 April 2015Unsourced statements (April 2015, July 2017)
Cosmic stringLow Start1 September 2016References needed (September 2016)
Cosmic webLow Stub2 July 2017Notability unclear (July 2017), Categories needed (July 2017)
Cosmic windUnknown Stub2 June 2017Expert attention needed (June 2017)
Cosmic-ray observatoryMid Start1 July 2017Expansion needed (July 2017)
CosmochemistryHigh Start3 January 2017Prose needed (January 2017), Slanted towards recent events (January 2017), Cleanup needed (January 2017)
CosmolabeLow Stub2 January 2016Sources lacking (January 2016), In-text citations lacking (June 2016)
Cosmological constantHigh B6 July 2013Expert attention needed (March 2014), Unsourced statements (May 2016), Disputed statements (August 2013), Clarification needed (July 2013), Too technical (March 2014)
Cosmological constant problemLow Start7 March 2017Expert attention needed (April 2017), Unsourced statements (March 2017), Clarification needed (April 2017), Weasel-worded phrases (April 2017), References needed (April 2017), Factual verification needed (October 2017)
CosmologyHigh C4 January 2010Unsourced statements (January 2010, January 2013, September 2015), References needed (January 2016)
Cosmology in medieval IslamLow C4 October 2016References needed (October 2016), Introduction cleanup (January 2017), Unsourced statements (July 2017), Dead external links (September 2017)
Cosmos: A Personal VoyageBottom C1 December 2016Unsourced statements (December 2016)
Crab NebulaTop B1 March 2017Unsourced statements (March 2017)
Crab PulsarHigh C2 April 2013Unsourced statements (April 2013), Clarification needed (April 2013)
Crafoord PrizeHigh FL1 2015Potentially dated statements (2015)
Crater (constellation)Mid Start1 August 2010Unsourced statements (August 2010)
Crater IllusionLow Start4 May 2017Orphaned (May 2017), Cleanup needed (May 2017, May 2017), References needed (May 2017)
Crater depthLow Stub1 March 2016References needed (March 2016)
Creation–evolution controversyHigh B10 June 2008Expansion needed (June 2008), Original research (July 2014), Minor POV problems (June 2012), Unsourced statements (July 2014, April 2017), Vague or ambiguous time (July 2014), Page number citations needed (May 2014), Weasel-worded phrases (May 2015, April 2017), Factual verification needed (April 2017)
Crescent NebulaLow Stub1 January 2013Unsourced statements (January 2013)
CruxTop C7 December 2010Unsourced statements (November 2011, December 2010, December 2014), Potentially dated statements (2017, July 2015), Trivia sections (January 2017), Weasel-worded phrases (August 2017)
CulminationLow Start1 August 2007Unsourced statements (August 2007)
Cyclic modelHigh C3 February 2013Expert attention needed (February 2013), Reliable references lacking (February 2013)
Cygnus (constellation)Top C1 February 2014Disputed statements (February 2014)
Cygnus X (star complex)Mid Start1 December 2012References needed (December 2012)
CythereanUnknown Start1 July 2013Unsourced statements (July 2013)
Côte d'Azur ObservatoryLow Stub1 February 2016Sources lacking (February 2016)
D-type asteroidLow Stub1 July 2008Unsourced statements (July 2008)
DART radiative transfer modelLow Start1 October 2016In-text citations lacking (October 2016)
DDO 169Low Start1 December 2016Dead external links (December 2016)
DEN 1048−3956Low Stub1 January 2017Unsourced statements (January 2017)
DI LacertaeLow Stub1 April 2017Sources lacking (April 2017)
DK LacertaeLow Stub1 April 2017In-text citations lacking (April 2017)
DM GeminorumLow Stub1 April 2017In-text citations lacking (April 2017)
DM LyraeLow Stub1 April 2010References needed (April 2010)
DQ HerculisLow Start1 March 2016References needed (March 2016)
DR 6 nebulaLow Start1 February 2009Orphaned (February 2009)
DV AquariiLow Stub2 October 2010Unsourced statements (October 2010), References needed (August 2017)
Daniel K. Inouye Solar TelescopeLow Start3 2014Potentially dated statements (2014, August 2017), Unsourced statements (March 2017)
Daniel N. BakerLow Stub1 June 2017Conflict of interest (June 2017)
Dannie Heineman Prize for AstrophysicsMid List1 December 2009References needed (December 2009)
Dante LaurettaMid Start1 November 2014BLP articles lacking sources (November 2014)
Dark energyTop B2 August 2016Unsourced statements (August 2016), Disputed statements (February 2017)
Dark flowLow Start2 August 2013Factual verification needed (August 2013), Dead external links (December 2016)
Dark fluidLow Start4 October 2016Original research (October 2016), Disputed statements (October 2016), Unsourced statements (October 2016, April 2017)
Dark globular clusterUnknown Stub1 Web citation with no URL
Dark matterTop B4 April 2016Unsourced statements (April 2016, May 2017), Clarification needed (August 2016), Reliable references lacking (December 2016)
Dark moonBottom Stub2 August 2014Unsourced statements (February 2015), References needed (August 2014)
Dark nebulaTop Start1 February 2009Clarification needed (February 2009)
Dark star (Newtonian mechanics)Low Start2 March 2013In-text citations lacking (March 2013), Web citation with no URL
Dark star (dark matter)Low Start3 September 2012Expert attention needed (September 2012), Web citation with no URL
Dark-energy starLow Start3 November 2008Expert attention needed (November 2008), In-text citations lacking (April 2010)
Dark-frame subtractionMid Stub1 June 2007References needed (June 2007)
Dark-sky movementMid Start1 CS1 errors: dates
Darwin (spacecraft)Low Start1 October 2009Unsourced statements (October 2009)
David C. JewittMid Start1 July 2016References needed (July 2016)
David D. BalamLow Stub2 February 2010Unsourced statements (February 2010), Citation with accessdate and no URL
David Dunlap Observatory CatalogueLow Stub1 December 2009Sources lacking (December 2009)
David GrinspoonMid C2 May 2016Unsourced statements (May 2016), Failed verification (May 2016)
David J. EicherLow C1 November 2011BLP articles lacking sources (November 2011)
David J. StevensonUnknown Stub1 December 2016Unsourced statements (December 2016)
David NaylorUnknown Start2 October 2013Dead external links (October 2013, May 2016)
David RittenhouseLow Start4 November 2010Unsourced statements (November 2010, July 2012, February 2017), Weasel-worded phrases (November 2010)
David SouthwoodMid C5 July 2012Detailed references needed, Unsourced statements (October 2013, July 2012, December 2016), Failed verification (July 2012)
Day length fluctuationsLow C1 March 2016Unsourced statements (March 2016)
DaytimeLow Start2 December 2012Sources lacking (December 2012), Unsourced statements (February 2017)
De Sitter spaceHigh Start6 November 2012Expert attention needed (May 2017), Clarification needed (November 2012, June 2016), Categories needed (May 2017), Too technical (May 2017)
De revolutionibus orbium coelestiumHigh C3 July 2007Unsourced statements (July 2007, February 2016), References needed (March 2017)
Debrecen Heliophysical ObservatoryUnknown Stub2 May 2014Coordinates needed, Orphaned (May 2014)
Deceleration parameterLow Start1 February 2011References needed (February 2011)
DeclinationHigh C1 August 2012Unsourced statements (August 2012)
Deep Impact (spacecraft)Mid GA1 September 2017Dead external links (September 2017)
Deep Space IndustriesLow Start8 May 2013Detailed references needed, Unsourced statements (May 2013), Potentially dated statements (2013, 2016, August 2016), Update needed (August 2014, August 2016), Clarification needed (August 2016)
Deep-Sky PlannerUnknown Start1 March 2014Orphaned (March 2014)
Degenerate matterMid Start2 October 2010References needed (October 2010), Unsourced statements (February 2017)
Degree (angle)High B2 January 2008Unsourced statements (April 2009, January 2008)
Delta AndromedaeMid C1 September 2017Dead external links (September 2017)
Delta AraeLow Start1 January 2011Clarification needed (January 2011)
Delta ColumbaeLow Start1 April 2009Unsourced statements (April 2009)
Delta CrucisMid C1 January 2012Unsourced statements (January 2012)
Delta CygniMid Start1 February 2012Unsourced statements (February 2012)
Delta EridaniLow Start2 October 2016Unsourced statements (October 2016, March 2017)
Delta GeminorumLow C1 January 2012Unsourced statements (January 2012)
Delta LeonisMid C2 December 2016Dead external links (December 2016), Unsourced statements (April 2017)
Delta PavonisMid C1 March 2012Unsourced statements (March 2012)
Delta Piscis AustriniLow Start1 May 2017Reliable references lacking (May 2017)
Delta SagittaeLow Start1 July 2017Reliable references lacking (July 2017)
Delta Scuti variableMid Start1 December 2009Unsourced statements (December 2009)
Delta SerpentisLow Start1 December 2009References needed (December 2009)
Delta Ursae MinorisLow Stub1 April 2009Unsourced statements (April 2009)
Delta2 LyraeLow Start1 June 2017Unsourced statements (June 2017)
Delta3 TauriLow Start1 August 2017Unsourced statements (August 2017)
Denis DenisenkoMid Start1 August 2010BLP articles lacking sources (August 2010)
Dennis MammanaLow Start2 January 2017Unsourced statements (January 2017), Unreferenced BLPs (January 2017)
Dennis RawlinsLow Start1 May 2017Peacock terms (May 2017)
Desert Fireball NetworkLow Stub2 September 2017CS1 errors: ISBN, Links needing disambiguation (September 2017)
Detached objectMid GA1 February 2016Update needed (February 2016)
Dialogue Concerning the Two Chief World SystemsMid C1 February 2017References needed (February 2017)
DiazenyliumLow C2 November 2015Broken or outdated citations (November 2015), Dead external links (September 2017)
Dicke radiometerUnknown Stub1 March 2017Sources lacking (March 2017)
Differential rotationMid Start1 December 2009Sources lacking (December 2009)
Diffuse sky radiationLow C2 February 2009Unsourced statements (February 2009, March 2016)
DigiconLow Stub2 September 2009In-text citations lacking (September 2009), Unsourced statements (February 2016)
Digital Access to a Sky Century @ HarvardUnknown Start1 November 2014Potentially dated statements (November 2014)
Digitized Sky SurveyLow Start1 January 2013Sources lacking (January 2013)
Dimitri MihalasLow Start1 February 2013BLP articles lacking sources (February 2013)
Disc galaxyMid Stub2 February 2017References needed (February 2017), Weasel-worded phrases (July 2017)
Discoveries of exoplanetsLow List1 February 2010Clarification needed (February 2010)
Discovery Channel TelescopeLow Start1 Citation with accessdate and no URL
Discovery of NeptuneMid B1 October 2012NPOV disputes (October 2012)
Dissociative recombinationMid Stub1 December 2009Sources lacking (December 2009)
Diurnal motionLow Start1 December 2009Sources lacking (December 2009)
Dividing engineLow C1 October 2012Style editing needed (October 2012)
Dmitry DubyagoUnknown Stub1 August 2008References needed (August 2008)
Dobsonian telescopeLow C3 February 2007Unsourced statements (February 2007, September 2014), Dead external links (December 2016)
Dominion Radio Astrophysical ObservatoryLow Start1 September 2017Dead external links (September 2017)
Donald Edward OsterbrockUnknown Stub1 February 2013In-text citations lacking (February 2013)
Donald Lynden-BellUnknown Start1 October 2016Vague or ambiguous time (October 2016)
Doppler effectHigh B3 December 2009Unsourced statements (December 2009, June 2015), Page number citations needed (June 2015)
Doppler spectroscopyMid B4 March 2010Unsourced statements (March 2010), CS1 errors: external links, Dead external links (January 2017, September 2017)
Doris DaouLow Start1 January 2017Unsourced statements (January 2017)
Doris VickersUnknown Stub2 July 2016Potentially dated statements (July 2016), Categories needed (July 2016)
Dorothea KlumpkeMid C1 November 2012In-text citations lacking (November 2012)
Dorsum CayeuxLow Stub1 February 2017Sources lacking (February 2017)
Double ClusterLow C1 December 2010Unsourced statements (December 2010)
Double Fourier sphere methodUnknown Stub1 December 2015Orphaned (December 2015)
Double periodic variableLow Start1 April 2016Incomplete lists (April 2016)
Double-slit experimentHigh B1 February 2012References needed (February 2012)
Drake equationMid C2 August 2015Reliable references lacking (August 2015), Dead external links (September 2017)
Drebbel (crater)Low Start1 September 2013In-text citations lacking (September 2013)
Dropout (astronomy)Low Stub1 December 2009Sources lacking (December 2009)
Duncan SteelLow Stub1 July 2015BLP articles lacking sources (July 2015)
Dunhuang Star ChartMid Start1 October 2014Unsourced statements (October 2014)
DustPediaUnknown C2 June 2016Cleanup needed (June 2016, June 2016)
Dwarf galaxy problemMid Start1 November 2016Unsourced statements (November 2016)
Dwarf planetTop FA2 January 2015Potentially dated statements (January 2015), Dead external links (October 2016)
Dyson sphereMid GA3 2005Detailed references needed, Potentially dated statements (2005), Web citation with no URL
Düsseldorf-Bilk ObservatoryLow Stub1 March 2014References needed (March 2014)
E NebulaLow Stub1 July 2013References needed (July 2013)
E-type asteroidLow Stub1 September 2008References needed (September 2008)
EQ PegasiLow Stub1 September 2015References needed (September 2015)
ER=EPRMid Stub2 May 2017Unsourced statements (May 2017), Sections needed (May 2017)
ESO 146-5Low Stub1 November 2016References needed (November 2016)
ESO 510-G13Low Stub2 February 2007Unsourced statements (February 2007), Dead external links (September 2017)
ESPRESSOLow Start6 October 2012Expert attention needed (October 2012), Unsourced statements (August 2014), Too technical (October 2012), Dead external links (June 2016, September 2017)
EZ AquariiLow Start1 June 2010Unsourced statements (June 2010)
Eagle NebulaHigh Start1 March 2008Unsourced statements (March 2008)
EarthTop FA3 July 2010Potentially dated statements (July 2010, 2015, June 2016)
Earth Observation CenterLow Stub1 January 2015Sources lacking (January 2015)
Earth analogMid Start2 July 2015Unsourced statements (September 2015, July 2015)
Earth massLow Start5 June 2015Unsourced statements (February 2016, June 2015, January 2016, August 2016), Expansion needed (September 2016)
Earth's orbitHigh C1 January 2010Unsourced statements (January 2010)
Eccentric JupiterLow Stub1 April 2008Unsourced statements (April 2008)
EclipseTop B1 CS1 errors: external links
Ed KruppLow Start1 April 2017Unsourced statements (April 2017)
Eddington (spacecraft)Low Stub1 February 2016Unsourced statements (February 2016)
Eddington MedalMid List5 September 2017DOIs inactive (2017), Tables needed (September 2017), Cleanup needed (September 2017), List cleanup (September 2017), Dead external links (September 2017)
Edgar W. WoolardMid Start1 CS1 errors: chapter ignored
Edinburgh MedalBottom List2 November 2015References needed (November 2015), NPOV disputes (February 2016)
Edmond HalleyMid C4 September 2013References needed (March 2014), Clarification needed (September 2013), CS1 errors: external links, Introduction cleanup (December 2016)
Eduard SchönfeldLow Stub1 January 2014In-text citations lacking (January 2014)
Edward Emerson BarnardMid Start1 October 2013In-text citations lacking (October 2013)
Edward S. HoldenUnknown Start1 March 2013References needed (March 2013)
Edward SpiegelMid Start1 August 2014BLP articles lacking sources (August 2014)
Edward TroughtonLow Start1 Citation with accessdate and no URL
Edward Walter MaunderUnknown Start1 September 2017Dead external links (September 2017)
Edwin Brant FrostUnknown Stub1 June 2008Unsourced statements (June 2008)
Edwin Ernest SalpeterUnknown Start1 December 2016Unsourced statements (December 2016)
Edwin Francis CarpenterUnknown Stub3 May 2010References needed (May 2010), Unsourced statements (May 2010), Dead external links (December 2016)
Edwin HubbleHigh B1 April 2017Unsourced statements (April 2017)
Effective temperatureHigh Start1 December 2011Unsourced statements (December 2011)
Effelsberg 100-m Radio TelescopeLow Start1 November 2016References needed (November 2016)
Egbert Adriaan KreikenMid Stub1 June 2007Sources lacking (June 2007)
Egyptian astronomyUnknown Start2 August 2009Unsourced statements (July 2010), Clarification needed (August 2009)
Einstein TowerMid Start1 August 2013References needed (August 2013)
Einstein's unsuccessful investigationsLow Start2 June 2010Unsourced statements (June 2010, November 2015)
Ejnar HertzsprungMid Start1 August 2011Clarification needed (August 2011)
Elara (moon)Unknown Start1 March 2016Dead external links (March 2016)
Electron captureMid Start1 September 2012Weasel-worded phrases (September 2012)
Electroweak epochHigh Start1 April 2012Weasel-worded phrases (April 2012)
Electroweak starLow Stub1 July 2014References needed (July 2014)
Elena V. PitjevaMid Start1 December 2016Dead external links (December 2016)
Elephant's Trunk nebulaMid Start1 May 2009Rewrite needed (May 2009)
Elisabeth VreedeLow Stub1 July 2010Expansion needed (July 2010)
Elizabeth Langdon WilliamsLow Stub1 August 2017Orphaned (August 2017)
Elliptical galaxyTop C2 March 2015Unsourced statements (March 2015), In-text citations lacking (March 2015)
Embedded clusterLow Stub2 October 2017Citation with accessdate and no URL, References needed (October 2017)
Emilios T. HarlaftisLow Start1 February 2017References needed (February 2017)
Emily LakdawallaLow C3 December 2015Incomplete lists (December 2015), Vague or ambiguous time (January 2017), Unsourced statements (January 2017)
Emily LevesqueLow Start1 CS1 errors: dates
Emily RiceLow Start2 Citation with bare URL, Citation lacking title
Emission nebulaHigh Start2 May 2010References needed (May 2010), In-text citations lacking (May 2010)
Encyclopedia AstronauticaBottom Stub1 July 2017Potentially dated statements (July 2017)
Encyclopedic Dictionary of AstronomyUnknown Stub1 September 2010Expansion needed (September 2010)
Energia Lunar ExpeditionLow Stub2 July 2010Expansion needed (July 2010), Sources lacking (October 2015)
Engraved Hourglass NebulaMid Start2 February 2007Unsourced statements (February 2007), Trivia sections (April 2017)
Eos familyLow Start1 September 2009Unsourced statements (September 2009)
Ephemeris dayUnknown Stub1 June 2015Sources lacking (June 2015)
Epoch (astronomy)Top C1 April 2012Unsourced statements (April 2012)
Epoch (reference date)Low C4 June 2015References needed (June 2015), CS1 errors: external links, CS1 errors: invisible characters, Dead external links (December 2016)
Epsilon AurigaeMid GA1 October 2017Unsourced statements (October 2017)
Epsilon CancriLow Stub1 August 2017Unsourced statements (August 2017)
Epsilon Canis MajorisMid C1 September 2017Dead external links (September 2017)
Epsilon CapricorniLow Start1 July 2017Unsourced statements (July 2017)
Epsilon ChamaeleontisLow Start2 August 2017Unsourced statements (August 2017, October 2017)
Epsilon HerculisLow Stub1 May 2016Unsourced statements (May 2016)
Epsilon IndiMid C1 CS1 errors: external links
Epsilon LeonisMid C1 April 2017Unsourced statements (April 2017)
Epsilon LupiMid C1 February 2017Unsourced statements (February 2017)
Epsilon LyraeLow Start2 March 2017Unsourced statements (March 2017), References needed (June 2017)
Epsilon PegasiMid C1 April 2017Unsourced statements (April 2017)
Epsilon Piscis AustriniLow Start1 May 2017Reliable references lacking (May 2017)
Epsilon Ursae MajorisMid Start1 January 2013Unsourced statements (January 2013)
Epsilon1 AraeLow C1 January 2011Clarification needed (January 2011)
EquantLow Start1 July 2014Unsourced statements (July 2014)
Equatorial ridgeLow Start1 September 2007Unsourced statements (September 2007)
Equatorial ridge on IapetusLow Start1 September 2007Unsourced statements (September 2007)
EquinoxTop C5 December 2011References needed (December 2011, September 2012, September 2017), Unsourced statements (September 2012, September 2017)
EquuleusMid Start2 June 2008Unsourced statements (December 2008), Expansion needed (June 2008)
EratosthenesHigh C2 May 2017Weasel-worded phrases (May 2017), Clarification needed (September 2017)
Eridanus (constellation)Top C1 2007Potentially dated statements (2007)
Eridanus GroupMid Start1 CS1 errors: chapter ignored
Eridanus IILow C2 March 2017Reference errors, Expansion needed (March 2017)
Eris (dwarf planet)Top FA2 February 2016Potentially dated statements (February 2016, August 2017)
Ernest J. SternglassBottom Start4 April 2009Unsourced statements (April 2009, April 2011, August 2016), References needed (April 2015)
Escambia Amateur Astronomers AssociationLow Stub1 August 2011References needed (August 2011)
Escape velocityMid C1 October 2015Unsourced statements (October 2015)
Estevan Antonio FuertesLow Start1 May 2013In-text citations lacking (May 2013)
Eta AquilaeMid C1 February 2016Factual verification needed (February 2016)
Eta CarinaeTop FA1 October 2017Dead external links (October 2017)
Eta CentauriMid C1 October 2017Unsourced statements (October 2017)
Eta GeminorumMid C1 August 2016Unsourced statements (August 2016)
Eta LyraeLow Stub1 January 2017Unsourced statements (January 2017)
Eta OphiuchiMid Start2 October 2009Unsourced statements (October 2009, September 2015)
Eta OrionisMid Stub1 June 2016Unsourced statements (June 2016)
Eta Piscis AustriniLow Start1 May 2017Reliable references lacking (May 2017)
Eta SerpentisMid C1 August 2012Unsourced statements (August 2012)
Eta TelescopiiLow Start1 August 2017Unsourced statements (August 2017)
Eta VirginisMid C1 January 2012Unsourced statements (January 2012)
Eta1 DoradusLow Stub2 September 2008Unsourced statements (September 2008, August 2017)
Eudoxus of CnidusMid B1 September 2010Unsourced statements (September 2010)
Eugene ParkerUnknown Start1 May 2017Weasel-worded phrases (May 2017)
Eurasian Astronomical SocietyLow Stub1 August 2008Sources lacking (August 2008)
European Astronomical SocietyMid Start1 July 2017Sources lacking (July 2017)
European Gravitational ObservatoryLow Stub1 February 2016Sources lacking (February 2016)
European Pulsar Timing ArrayLow Start2 December 2012Unsourced statements (July 2013, December 2012)
European Southern ObservatoryHigh B1 October 2015Unsourced statements (October 2015)
Europlanetarium GenkBottom C1 November 2008Sources lacking (November 2008)
Eva Ahnert-RohlfsLow Stub2 June 2008Sources lacking (June 2008), Clarification needed (February 2010)
ExocometUnknown Stub2 October 2014Unsourced statements (October 2014), Dead external links (September 2017)
ExomoonMid Start1 September 2017Dead external links (September 2017)
ExoplanetTop B1 June 2017Unsourced statements (June 2017)
Exoplanetary Circumstellar Environments and Disk ExplorerLow Start1 March 2012References needed (March 2012)
ExoplanetologyUnknown Stub1 November 2013Potentially dated statements (November 2013)
Exotic starMid Start2 August 2011Potentially dated statements (2017), Weasel-worded phrases (August 2011)
Exploration of IoMid B1 April 2010Unsourced statements (April 2010)
Extended theories of gravityUnknown Stub1 October 2013Expansion needed (October 2013)
Extinction (astronomy)Top B3 December 2009Expert attention needed (December 2009), Too technical (December 2009)
Extragalactic astronomyMid Stub1 March 2007References needed (March 2007)
Extraterrestrial (TV documentary)Low C2 May 2009References needed (October 2011), Unsourced statements (May 2009)
Extraterrestrial atmosphereMid B2 August 2015Unsourced statements (October 2015, August 2015)
Extraterrestrial lifeTop C2 March 2014Potentially dated statements (March 2014, September 2017)
Extraterrestrial liquid waterMid C4 April 2011Unsourced statements (April 2011, April 2015), Clarification needed (April 2015), Weasel-worded phrases (April 2015)
Extraterrestrial materialsLow C2 April 2010Style editing needed (April 2010), Unsourced statements (September 2015)
Extraterrestrial skiesMid C3 February 2007Unsourced statements (February 2007), Original research (April 2013, November 2013)
Extraterrestrial vortexLow Start1 July 2008References needed (July 2008)
Extreme ultraviolet Imaging TelescopeLow Start1 July 2016References needed (July 2016)
Extremely large telescopeUnknown Start1 September 2017Dead external links (September 2017)
EyepieceUnknown C3 June 2010Unsourced statements (June 2010, December 2010), In-text citations lacking (December 2014)
F-type asteroidLow Stub1 January 2009Sources lacking (January 2009)
F. J. M. StrattonUnknown Start1 December 2016Dead external links (December 2016)
FH SerpentisLow Stub1 December 2016References needed (December 2016)
FOXSI Sounding RocketUnknown Stub1 CS1 errors: external links
FSC15307+3253Low Stub2 February 2009Orphaned (February 2009), Notability unclear (July 2016)
FU Orionis starMid Start1 2015Potentially dated statements (2015)
Faint Images of the Radio Sky at Twenty-CentimetersLow Start1 2017Potentially dated statements (2017)
Faint young Sun paradoxLow C1 January 2010Unsourced statements (January 2010)
Far-infrared astronomyMid Stub1 February 2013References needed (February 2013)
Fast Low-Ionization Emission RegionNA Redirect1 January 2007References needed (January 2007)
Fast radio burstHigh Start3 2016Potentially dated statements (2016), Split needed (January 2017), Unsourced statements (March 2017)
Faulkes Telescope ProjectLow Start1 August 2008Incomplete lists (August 2008)
Faye (crater)Low Start1 October 2014In-text citations lacking (October 2014)
Federation of Astronomical SocietiesLow Stub2 August 2014References needed (October 2015, August 2014)
Feige 55Low Stub1 January 2015Notability unclear (January 2015)
Ferdinand VerbiestMid C1 June 2008Unsourced statements (June 2008)
Fermi Gamma-ray Space TelescopeMid Start1 June 2017References needed (June 2017)
Fermi paradoxMid B1 August 2016Unsourced statements (August 2016)
Fictional planets of the Solar SystemBottom C2 February 2008References needed (February 2008), Reliable references lacking (October 2013)
Fiona A. HarrisonUnknown Start2 Web citation with no URL, CS1 errors: external links
First Cambridge Catalogue of Radio SourcesLow Stub1 March 2012Expansion needed (March 2012)
First magnitude starUnknown Start1 CS1 errors: dates
First observation of gravitational wavesTop B2 February 2016Unsourced statements (February 2016), Clarification needed (March 2016)
Fiske PlanetariumLow Stub1 July 2016In-text citations lacking (July 2016)
Five hundred meter Aperture Spherical TelescopeLow Start1 2017Potentially dated statements (2017)
Flame NebulaMid Stub1 September 2015Unsourced statements (September 2015)
Flare starMid Start1 February 2013Unsourced statements (February 2013)
FlexCraftLow Stub1 October 2016References needed (October 2016)
FomalhautTop C2 May 2013Obsolete information (May 2013), Disputed statements (August 2017)
Fomalhaut CLow Start2 March 2017Citation with accessdate and no URL, Orphaned (March 2017)
Former constellationsLow Start2 February 2013Unsourced statements (October 2015), In-text citations lacking (February 2013)
Fornjot (moon)Low Stub1 January 2017Dead external links (January 2017)
Fracastorius (crater)Low Start1 February 2014In-text citations lacking (February 2014)
Frances LowaterUnknown Stub2 June 2016Citation with accessdate and no URL, Orphaned (June 2016)
Francesco BianchiniLow Start1 November 2010Expansion needed (November 2010)
Francesco MancaLow Start1 November 2015Unsourced statements (November 2015)
Francesco de VicoMid Start1 May 2014References needed (May 2014)
Franck (crater)Low Start1 September 2015In-text citations lacking (September 2015)
Frank KamenyUnknown Start1 January 2011Dead external links (January 2011)
Frank ShuMid Start1 February 2013BLP articles lacking sources (February 2013)
Frank Watson DysonUnknown Start1 September 2011Unsourced statements (September 2011)
Franz Xaver von ZachUnknown Start1 May 2014In-text citations lacking (May 2014)
François de BaillouUnknown Stub1 June 2016Orphaned (June 2016)
Fred EspenakUnknown Stub1 March 2015Unsourced statements (March 2015)
Fred HoyleHigh B4 February 2015Unsourced statements (February 2015, May 2016, March 2015), References needed (August 2017)
Fred Lawrence Whipple ObservatoryMid Start1 July 2012Reliable references lacking (July 2012)
Frederick C. LeonardMid C1 Citation with accessdate and no URL
FreeFlyerLow Start1 June 2010Orphaned (June 2010)
Freimut BörngenLow Start1 2006Potentially dated statements (2006)
Frequency separationLow Stub2 October 2009Introduction cleanup (October 2009), Context needed (October 2009)
Friedmann–Lemaître–Robertson–Walker metricMid C4 2003Potentially dated statements (2003), Unsourced statements (September 2011, June 2011, January 2016)
Friedrich BesselHigh Start1 December 2014References needed (December 2014)
Friedrich Georg Wilhelm von StruveMid Start1 April 2015References needed (April 2015)
Friedrich Wilhelm ArgelanderMid Start1 URL error
Frosty Leo NebulaMid Start2 June 2008Expansion needed (June 2008), Dead external links (October 2017)
Frozen star (hypothetical star)Low Stub1 March 2014References needed (March 2014)
Fulvio MeliaMid Start3 December 2010Reliable references lacking (December 2010), BLP articles lacking sources (December 2010), Conflict of interest (August 2016)
Fumiaki UtoLow Stub1 November 2010BLP articles lacking sources (November 2010)
Future of an expanding universeMid B1 June 2011Unsourced statements (June 2011)
Fuzzball (string theory)Low Start1 July 2013References needed (July 2013)
Félix TisserandUnknown Start2 February 2012References needed (February 2012), In-text citations lacking (February 2012)
G 161-71Unknown Stub2 February 2015Introduction cleanup (February 2015), Context needed (February 2015)
G 208-44/208-45Low Stub1 August 2016References needed (August 2016)
G-type asteroidLow Stub1 June 2014References needed (June 2014)
G-type main-sequence starMid Start1 October 2017Dead external links (October 2017)
GADGETLow Start2 April 2012Reliable references lacking (April 2012), Notability unclear (April 2012)
GD 165Low Start2 February 2017Cleanup needed (February 2017, February 2017)
GD 66Low C1 December 2008Unsourced statements (December 2008)
GENLN2Unknown Stub2 February 2015Introduction cleanup (February 2015), Context needed (February 2015)
GEO-LEOLow Start3 March 2009Sources lacking (December 2010), Promotional tone (March 2009), Dead external links (October 2017)
GJ 1005Unknown Stub1 May 2017Unsourced statements (May 2017)
GJ 3737Unknown Stub1 September 2015References needed (September 2015)
GOES-16Low Start2 November 2014Conflict of interest (November 2014), Reliable references lacking (November 2014)
GOODS-N-774Low Stub2 May 2017CS1 errors: dates, Orphaned (May 2017)
GRB 030329Mid Start1 Citation has redundant parameters
GRB 031203Mid B1 December 2014Orphaned (December 2014)
GRB 051221AMid Start1 October 2010Dead external links (October 2010)
GRB 060614Mid Stub1 February 2016References needed (February 2016)
GRB 070714BMid Start1 October 2010Orphaned (October 2010)
GRB 090423Mid C1 January 2017Dead external links (January 2017)
GRB 100621ALow Stub1 October 2010Orphaned (October 2010)
GRB 110328AMid Stub1 CS1 errors: external links
GRB 971214Low Start1 April 2012References needed (April 2012)
GRO J0422+32Low Stub2 January 2017Page number citations needed (January 2017), References needed (January 2017)
GRO J1655-40Mid Start3 April 2017Unsourced statements (April 2017), References needed (April 2017), Failed verification (April 2017)
GRO J1719-24Low Stub1 April 2017Unsourced statements (April 2017)
GRS 1915+105Mid Start1 October 2017Dead external links (October 2017)
GS 2000+25Low Stub1 May 2017References needed (May 2017)
GW 123.4-1.5Low Stub1 February 2009Orphaned (February 2009)
GW170817Mid Start1 October 2017Unsourced statements (October 2017)
Gaia (spacecraft)Mid C1 October 2012Unsourced statements (October 2012)
Gaius Julius HyginusLow Start1 January 2017Dead external links (January 2017)
Galactic CenterHigh Start2 July 2015References needed (July 2015), Unsourced statements (July 2017)
Galactic Emission MappingLow Start1 July 2012Orphaned (July 2012)
Galactic astronomyMid Start1 August 2011Unsourced statements (August 2011)
Galactic haloMid Start2 July 2014References needed (July 2014), In-text citations lacking (July 2014)
Galactic orientationMid Start2 April 2009Expert attention needed (April 2009)
Galactic quadrantMid C1 August 2010Expansion needed (August 2010)
Galactic tideMid C2 December 2014Unsourced statements (December 2014), References needed (April 2015)
Galaxies in fictionLow Start3 February 2007References needed (July 2008), Unsourced statements (February 2007), Expansion needed (November 2013)
Galaxy H-Alpha Fabry-Perot SystemLow Start1 January 2017Promotional tone (January 2017)
Galaxy X (galaxy)Unknown Stub1 May 2015Orphaned (May 2015)
Galaxy clusterHigh Start1 August 2014Unsourced statements (August 2014)
Galaxy mergerHigh C1 September 2015Unsourced statements (September 2015)
Galaxy morphological classificationHigh C1 October 2007References needed (October 2007)
Galaxy rotation curveHigh C7 August 2015Expert attention needed (December 2016), Clarification needed (August 2015), Introduction cleanup (December 2016), Reliable references lacking (December 2016), Unsourced statements (December 2016), Weasel-worded phrases (December 2016)
Galen (crater)Low Start1 May 2012In-text citations lacking (May 2012)
Galenki RT-70 radio telescopeLow Stub1 January 2017Expansion needed (January 2017)
Galilaei (Martian crater)Unknown Start1 March 2017Unsourced statements (March 2017)
Galileo (spacecraft)High B3 February 2011References needed (December 2011), Unsourced statements (February 2011), Clarification needed (September 2017)
Galileo GalileiTop GA5 January 2016Detailed references needed, Citation has redundant parameters, Unsourced statements (January 2016, October 2016), References needed (August 2017)
Galileo affairHigh B7 August 2010Unsourced statements (August 2010, March 2015), Citation with format and no URL, Vague or ambiguous time (September 2015), Failed verification (October 2014), Dead external links (January 2017), References needed (June 2017)
GalileoMobileUnknown Stub2 December 2010Orphaned (December 2010), Wikilinks needed (March 2016)
Gamma ChamaeleontisLow Start1 December 2016Unsourced statements (December 2016)
Gamma Doradus variableMid Stub1 2017DOIs inactive (2017)
Gamma LeonisMid C1 August 2016Unsourced statements (August 2016)
Gamma LibraeLow Start1 April 2017Unsourced statements (April 2017)
Gamma PavonisLow Start1 February 2012Unsourced statements (February 2012)
Gamma Piscis AustriniLow Start1 May 2017Reliable references lacking (May 2017)
Gamma PyxidisLow Stub1 July 2017Reliable references lacking (July 2017)
Gamma Ursae MinorisMid C2 January 2016Unsourced statements (January 2016, May 2017)
Gamma-ray Burst Coordinates NetworkLow Start2 November 2015References needed (November 2015), In-text citations lacking (November 2015)
Gamma-ray burstTop FA2 November 2016Clarification needed (November 2016), Unsourced statements (January 2017)
Gamma-ray burst progenitorsHigh B1 September 2011Unsourced statements (September 2011)
Gaocheng Astronomical ObservatoryMid Start1 August 2017References needed (August 2017)
Garrett P. ServissLow Start1 July 2013Unsourced statements (July 2013)
Gaussian yearLow Stub1 December 2009Sources lacking (December 2009)
Gemini (constellation)Top C1 2017Potentially dated statements (2017)
Gemini ObservatoryMid C4 December 2008Unsourced statements (December 2008), Potentially dated statements (2017), Dead external links (November 2013), Vague or ambiguous time (April 2017)
Gennady S. Bisnovatyi-KoganUnknown Stub2 March 2009BLP articles lacking sources (March 2009), Notability unclear (October 2016)
Geocentric coordinatesUnknown Stub1 December 2009Sources lacking (December 2009)
Geocentric modelHigh B2 June 2015Viewpoints needed (June 2015), Unsourced statements (July 2017)
Geodynamics of terrestrial exoplanetsUnknown C1 December 2014Orphaned (December 2014)
Geoffrey MarcyMid Start1 September 2011BLP articles lacking sources (September 2011)
Geology of VenusMid C4 January 2009References needed (January 2009), Unsourced statements (November 2013, October 2016), Dead external links (October 2017)
Geomagnetic Field Monitoring Program of SUPARCOUnknown Stub3 October 2012Expert attention needed (October 2012), Clarification needed (October 2012)
Geomagnetic stormLow C7 December 2008Unsourced statements (March 2009, December 2008, February 2010, November 2010, March 2010, August 2016, March 2017)
GeoneutrinoLow C1 2016Potentially dated statements (2016)
Georg MerzUnknown Stub2 December 2014Cleanup needed (December 2014, December 2014)
Georg von PeuerbachLow Start1 August 2016Dead external links (August 2016)
George Biddell AiryMid B1 November 2016Unsourced statements (November 2016)
George Bishop's ObservatoryLow Stub1 April 2013Unsourced statements (April 2013)
George Clyde FisherUnknown Start1 June 2015Orphaned (June 2015)
George Comstock (astronomer)Low Stub1 March 2013In-text citations lacking (March 2013)
George DarwinUnknown Start2 December 2016References needed (December 2016), Dead external links (January 2017)
George Darwin LectureshipLow List1 September 2013Incomplete lists (September 2013)
George GamowHigh B1 May 2011Unsourced statements (May 2011)
George Henry PetersLow Stub1 April 2013Unsourced statements (April 2013)
George WetherillUnknown Start2 February 2013In-text citations lacking (February 2013), Improper non-free content (June 2017)
Georges LemaîtreUnknown C2 August 2010Unsourced statements (August 2010), Dead external links (October 2017)
Georgian National Astrophysical ObservatoryMid Stub1 September 2009References needed (September 2009)
Gerard BodifeeLow Start2 September 2013BLP articles lacking sources (September 2013), Original research (December 2015)
Gerard K. O'NeillMid FA1 September 2017Dead external links (September 2017)
Gerard KuiperHigh Start1 January 2016Disputed statements (January 2016)
Germano D'AbramoLow Start1 June 2016Unsourced statements (June 2016)
Gianluca MasiLow Stub1 September 2010BLP articles lacking sources (September 2010)
Giant Magellan TelescopeLow Start1 December 2015Potentially dated statements (December 2015)
Giant VoidMid Stub1 December 2016References needed (December 2016)
Giant planetTop C2 December 2014Clarification needed (December 2014), Dead external links (January 2017)
Giant starTop C1 October 2016Clarification needed (October 2016)
Giant-impact hypothesisMid C3 December 2013Unsourced statements (December 2013), Potentially dated statements (2015), CS1 errors: chapter ignored
Giordano BrunoMid C4 May 2014Unsourced statements (May 2014, February 2015), Weasel-worded phrases (February 2015), Failed verification (April 2017)
Giordano Bruno (crater)Low Start1 June 2011In-text citations lacking (June 2011)
Giovanni Battista HodiernaLow Start2 August 2015References needed (August 2015), In-text citations lacking (August 2015)
Giovanni BignamiLow Start2 June 2017Expansion needed (June 2017), Dead external links (June 2017)
Giuseppe AsclepiLow Stub1 June 2008Sources lacking (June 2008)
Giuseppe PiazziMid Start1 February 2010References needed (February 2010)
Gliese 167Low Stub1 January 2016Notability unclear (January 2016)
Gliese 179Low Stub1 August 2016References needed (August 2016)
Gliese 22Low Stub1 May 2010In-text citations lacking (May 2010)
Gliese 268Low Stub1 May 2017Unsourced statements (May 2017)
Gliese 299Low Stub1 September 2017Notability unclear (September 2017)
Gliese 317Low Stub1 2011Potentially dated statements (2011)
Gliese 318Low Stub1 Citation with accessdate and no URL
Gliese 581 planetary systemMid B1 April 2017Unsourced statements (April 2017)
Gliese 667Mid Start4 March 2012Unsourced statements (January 2013, March 2012, September 2014), Citation has redundant parameters
Gliese 667 CcMid Start2 March 2012Unsourced statements (March 2012), Clarification needed (March 2012)
Gliese 674Low Stub1 February 2016Unsourced statements (February 2016)
Gliese 69Low Stub1 January 2016Notability unclear (January 2016)
Gliese 710Mid Start1 September 2017Unsourced statements (September 2017)
Gliese 86 bLow Start1 April 2010Unsourced statements (April 2010)
Gliese 876Mid GA1 March 2015Clarification needed (March 2015)
Gliese 876 bLow GA1 December 2011Unsourced statements (December 2011)
Global Geospace ScienceLow Stub1 March 2012Sources lacking (March 2012)
Global Hands-On UniverseBottom C6 May 2010Reliable references lacking (May 2010), Cleanup needed (May 2010, May 2010), Introduction cleanup (May 2010), Clarification needed (May 2010), Peacock terms (May 2010)
Global catastrophic riskLow C4 July 2008Unsourced statements (July 2008), Citation with format and no URL, Clarification needed (July 2015, April 2017)
GoTo (telescopes)Unknown Start1 February 2014Sources lacking (February 2014)
Goldilocks principleBottom Start1 August 2017Original research (August 2017)
Goldreich-Kylafis effectLow Stub6 January 2017Expert attention needed (January 2017), Orphaned (January 2017), Context needed (January 2017), Too technical (January 2017), Introduction cleanup (January 2017)
Goode Solar TelescopeUnknown Start1 September 2017References needed (September 2017)
Goodsell ObservatoryLow Start2 September 2015Unsourced statements (May 2016), References needed (September 2015)
Gordon PettengillMid Start1 August 2012In-text citations lacking (August 2012)
Gran Telescopio CanariasMid Start5 January 2011Update needed (January 2011), Potentially dated statements (2015), Dead external links (August 2015, June 2016), Reliable references lacking (August 2015)
Grand Rapids Amateur Astronomical AssociationLow Stub2 August 2009Reliable references lacking (August 2009), References needed (August 2009)
Grand Unified TheoryHigh B5 November 2007Unsourced statements (November 2007, September 2011), Clarification needed (March 2016, January 2016), Weasel-worded phrases (March 2016)
Grand unification epochHigh Start1 July 2007Unsourced statements (July 2007)
Graphic telescopeLow Stub1 October 2015References needed (October 2015)
Graphical timeline of the Big BangLow Start1 December 2009Sources lacking (December 2009)
GravastarLow Start2 July 2013Unsourced statements (July 2013, April 2014)
Gravitational collapseMid Start3 October 2009References needed (October 2009), Expert attention needed (October 2009)
Gravitational instabilityLow Stub1 March 2014Orphaned (March 2014)
Gravitational keyholeLow C1 June 2015In-text citations lacking (June 2015)
Gravitational lensHigh Start2 May 2017Unsourced statements (May 2017), Clarification needed (May 2017)
Gravitational potentialMid C1 May 2012Clarification needed (May 2012)
Gravitational waveTop B5 May 2009Potentially dated statements (2012), Clarification needed (May 2009), Unsourced statements (February 2016, March 2016, September 2017)
Gravitational-wave astronomyMid Start1 August 2017Clarification needed (August 2017)
GravityHigh B1 March 2015Unsourced statements (March 2015)
Gravity Recovery and Interior LaboratoryMid Start1 August 2011Potentially dated statements (August 2011)
Great Comet of 1680Low Start1 June 2017Potentially dated statements (June 2017)
Great Debate (astronomy)Mid Start1 March 2017References needed (March 2017)
Great DiamondLow Stub2 May 2017Unsourced statements (May 2017), In-text citations lacking (May 2017)
Great FilterLow Start1 January 2010Reliable references lacking (January 2010)
Great YearLow Start2 January 2014Accuracy disputes (January 2014), Sections needed (June 2014)
Great cometUnknown Start3 July 2010Unsourced statements (July 2010), References needed (January 2015), Incomplete lists (December 2013)
Great conjunctionLow Start2 September 2008References needed (September 2008), Unsourced statements (December 2012)
Great refractorLow Start4 June 2016Citation with bare URL, Citation lacking title, CS1 errors: external links, Dead external links (June 2016)
Green star (astronomy)Bottom Start3 September 2017In-text citations lacking (September 2017), Unsourced statements (September 2017), Original research (September 2017)
Greenhill ObservatoryLow Start1 January 2017References needed (January 2017)
Gregory (lunar crater)Low Start1 July 2013In-text citations lacking (July 2013)
Greisen–Zatsepin–Kuzmin limitMid C1 October 2014Unsourced statements (October 2014)
Grigory ShajnLow Start1 October 2015Unsourced statements (October 2015)
Grooves (archaeology)Bottom Start1 March 2012Failed verification (March 2012)
Grote ReberLow C3 May 2010Unsourced statements (May 2010, August 2016), Reference cleanup (October 2010)
Ground System Architectures WorkshopLow Stub2 February 2009Orphaned (February 2009), Sources lacking (July 2017)
Guenter BruecknerLow Stub1 February 2010Clarification needed (February 2010)
Guide starLow Stub1 December 2006References needed (December 2006)
Guillaume BigourdanLow Stub1 September 2014References needed (September 2014)
Guillermo Gonzalez (astronomer)Mid Start5 September 2010Dead external links (September 2010, June 2016, September 2017), Accuracy disputes (February 2011), Original research (February 2011)
Gum 15Low Stub1 November 2016Expansion needed (November 2016)
Gum NebulaLow Stub1 October 2015Expansion needed (October 2015)
Gum catalogLow Start1 August 2009Expansion needed (August 2009)
Guo ShoujingMid Start2 March 2010Cleanup needed (March 2010, March 2010)
Gustave-Adolphe HirnUnknown Start3 February 2007References needed (November 2009), Unsourced statements (February 2007), Dead external links (January 2012)
Gustavo ScuseriaUnknown Stub3 May 2015Reliable references lacking (May 2015), BLP articles lacking sources (May 2015), Orphaned (June 2016)
Guthnick (crater)Low Start1 September 2009In-text citations lacking (September 2009)
GyrochronologyMid Start1 January 2015Original research (January 2015)
György KulinLow Stub1 August 2009Expansion needed (August 2009)
H I regionHigh Start1 January 2015Unsourced statements (January 2015)
H II regionTop FA1 Citation has redundant parameters
H. A. ReyLow Start1 August 2017References needed (August 2017)
HAT-P-11bLow Stub1 September 2014Clarification needed (September 2014)
HAT-P-32bLow Start1 Citation has redundant parameters
HAT-P-33bLow GA1 July 2011Unsourced statements (July 2011)
HAT-P-8Low Stub1 Citation has redundant parameters
HATNet ProjectLow Start1 August 2009Unsourced statements (August 2009)
HD 102272Low Stub1 2008Potentially dated statements (2008)
HD 102776Low Stub1 March 2016Unsourced statements (March 2016)
HD 10307Low Start2 August 2012References needed (August 2012), Unsourced statements (June 2017)
HD 104985Low Stub1 January 2017Unsourced statements (January 2017)
HD 108063Low Start1 July 2013In-text citations lacking (July 2013)
HD 110073Low Stub1 December 2009References needed (December 2009)
HD 113538 bLow Stub1 March 2013Dead external links (March 2013)
HD 113538 cLow Stub1 March 2013Dead external links (March 2013)
HD 115337Low Stub1 December 2015Unsourced statements (December 2015)
HD 115600Low Start1 September 2015Orphaned (September 2015)
HD 11964Low Stub1 July 2012Unsourced statements (July 2012)
HD 125288Low Stub1 July 2016References needed (July 2016)
HD 128311Low Start1 March 2016References needed (March 2016)
HD 129132Low Stub1 August 2017References needed (August 2017)
HD 129357Low Stub1 June 2017Vague or ambiguous time (June 2017)
HD 133600Mid Start1 August 2017Weasel-worded phrases (August 2017)
HD 138573NA Redirect4 August 2017Clarification needed (August 2017), Notability unclear (September 2017), Unsourced statements (September 2017), Weasel-worded phrases (September 2017)
HD 142022Low Stub2 April 2017Unsourced statements (April 2017), In-text citations lacking (May 2017)
HD 150248Low Stub3 September 2016Unsourced statements (September 2016, October 2016), Weasel-worded phrases (November 2016)
HD 154345 bLow Stub1 July 2015Unsourced statements (July 2015)
HD 15524Low Stub1 May 2017Unsourced statements (May 2017)
HD 156668Low C1 Web citation with no URL
HD 162020Low Stub1 January 2017References needed (January 2017)
HD 164604 bLow Stub1 CS1 errors: external links
HD 16955Low Stub1 August 2017References needed (August 2017)
HD 175541Low Stub1 CS1 errors: external links
HD 181433Low Stub1 2008Potentially dated statements (2008)
HD 183263 bLow Stub1 CS1 errors: external links
HD 183263 cLow Stub1 CS1 errors: external links
HD 188753Mid C3 January 2012Unsourced statements (January 2012), Potentially dated statements (August 2012), References needed (September 2015)
HD 192263Low Stub1 CS1 errors: external links
HD 192263 bLow Stub1 CS1 errors: external links
HD 192699Low Stub1 CS1 errors: external links
HD 195019Low Stub1 July 2015Weasel-worded phrases (July 2015)
HD 199942Low Stub1 April 2017References needed (April 2017)
HD 201298Low Stub1 March 2017References needed (March 2017)
HD 201507Low Stub1 June 2017Notability unclear (June 2017)
HD 202951Low Start1 August 2012Sources lacking (August 2012)
HD 209458 bMid GA1 July 2012Clarification needed (July 2012)
HD 210702Low Start1 CS1 errors: external links
HD 210702 bLow Start1 CS1 errors: external links
HD 211575Low Stub1 September 2016References needed (September 2016)
HD 222582Low Stub1 July 2017Unsourced statements (July 2017)
HD 222582 bLow Stub1 CS1 errors: external links
HD 23514Low Stub1 August 2014Unsourced statements (August 2014)
HD 240210Low Stub1 January 2017References needed (January 2017)
HD 24496Low Stub1 February 2016References needed (February 2016)
HD 24496 AbLow Stub2 April 2010Unsourced statements (April 2010), References needed (April 2013)
HD 256Low Stub2 April 2017Citation with accessdate and no URL, Unsourced statements (April 2017)
HD 259431Low Start1 December 2016Unsourced statements (December 2016)
HD 27631Low Stub1 May 2017References needed (May 2017)
HD 30963Low Stub2 August 2017Notability unclear (August 2017), Clarification needed (September 2017)
HD 33564Low Stub1 May 2017References needed (May 2017)
HD 40307 gLow Start1 June 2014Unsourced statements (June 2014)
HD 40979 bLow Stub1 CS1 errors: external links
HD 42818Low Stub1 December 2009Sources lacking (December 2009)
HD 43587Low Start1 February 2017References needed (February 2017)
HD 49878Low Stub2 April 2013In-text citations lacking (April 2013), Unsourced statements (April 2017)
HD 50235Low Stub1 December 2016Unsourced statements (December 2016)
HD 53143Mid C1 CS1 errors: chapter ignored
HD 60532Low Stub1 May 2017Dead external links (May 2017)
HD 61248Low Stub1 December 2009Sources lacking (December 2009)
HD 63032Low Disambig1 April 2017Unsourced statements (April 2017)
HD 6434 bLow Stub1 May 2013Unsourced statements (May 2013)
HD 66141Low Start2 November 2012Unsourced statements (November 2012, March 2015)
HD 6718Low Stub1 July 2017Unsourced statements (July 2017)
HD 69830Low C1 2011Potentially dated statements (2011)
HD 69863Low Stub1 December 2009Sources lacking (December 2009)
HD 70930Low Stub1 December 2009Sources lacking (December 2009)
HD 73389Low Stub1 December 2009Sources lacking (December 2009)
HD 73390Low Stub1 December 2009Sources lacking (December 2009)
HD 73526Low Stub1 August 2017References needed (August 2017)
HD 73634Low Stub2 January 2017References needed (January 2017), Unsourced statements (March 2017)
HD 74272Low Stub1 December 2016References needed (December 2016)
HD 75063Low Stub1 January 2017References needed (January 2017)
HD 75289Low Stub1 March 2017References needed (March 2017)
HD 76728Low Stub1 December 2009References needed (December 2009)
HD 77370Low Stub1 January 2017References needed (January 2017)
HD 79447Low Stub1 December 2009Sources lacking (December 2009)
HD 80230Low Stub1 December 2009Sources lacking (December 2009)
HD 81101Low Stub1 December 2009Sources lacking (December 2009)
HD 83183Low Stub1 December 2009Sources lacking (December 2009)
HD 83944Low Stub1 December 2009Sources lacking (December 2009)
HD 86226Low Stub1 August 2013Reliable references lacking (August 2013)
HD 88206Low Stub1 December 2009Sources lacking (December 2009)
HD 89890Low Start1 March 2017References needed (March 2017)
HD 90089Low Stub1 September 2010In-text citations lacking (September 2010)
HD 90264Low Stub1 December 2009Sources lacking (December 2009)
HD 90853Low Stub1 December 2009Sources lacking (December 2009)
HD 91496Low Stub1 September 2012References needed (September 2012)
HD 91942Low Stub1 December 2009Sources lacking (December 2009)
HD 92063Low Stub1 December 2009Sources lacking (December 2009)
HD 92397Low Stub1 December 2009Sources lacking (December 2009)
HD 93194Low Stub1 September 2012References needed (September 2012)
HD 93607Low Stub1 September 2012References needed (September 2012)
HD 96566Low Stub1 December 2009References needed (December 2009)
HD 96660Unknown Stub1 June 2014References needed (June 2014)
HD 97413Low Stub1 September 2017Notability unclear (September 2017)
HD 98800Mid Start1 May 2017References needed (May 2017)
HE 1327-2326Mid Stub1 November 2015Weasel-worded phrases (November 2015)
HE 1523-0901Mid Start1 March 2017Unsourced statements (March 2017)
HE0107-5240Mid Start1 April 2017Unsourced statements (April 2017)
HEGRAMid Start1 April 2013Sources lacking (April 2013)
HIP 41378Low Stub1 July 2016Unsourced statements (July 2016)
HIP 41378 bLow Stub1 December 2016References needed (December 2016)
HITRANUnknown Stub1 July 2009Unsourced statements (July 2009)
HR 3159Low Stub1 December 2009References needed (December 2009)
HR 3643Low Disambig1 December 2009Sources lacking (December 2009)
HR 3830Low Start2 August 2017References needed (August 2017), Unsourced statements (September 2017)
HR 3833Low Start1 August 2017References needed (August 2017)
HR 4102Low Stub1 October 2016References needed (October 2016)
HR 4138Low Stub1 December 2009Sources lacking (December 2009)
HR 4458Low Stub1 May 2017Unsourced statements (May 2017)
HR 5110Low Stub1 December 2015References needed (December 2015)
HR 6875Low Stub1 March 2017References needed (March 2017)
HR 8799 bLow Stub1 CS1 errors: missing author or editor
HR 8799 dLow Stub1 CS1 errors: missing author or editor
HR LyraeLow Stub1 April 2017In-text citations lacking (April 2017)
HV 11423Low Start1 September 2016Unsourced statements (September 2016)
HVC 127-41-330Low Stub1 December 2016References needed (December 2016)
HVS 7Unknown Stub1 Web citation with no URL
HXMM01Low Start1 July 2013Orphaned (July 2013)
HZE ionsUnknown Start1 January 2017Unsourced statements (January 2017)
Habitability of K-type main-sequence star systemsUnknown Start1 February 2013Unsourced statements (February 2013)
Habitability of binary star systemsHigh C1 April 2013Unsourced statements (April 2013)
Habitability of natural satellitesLow Start2 April 2013Unsourced statements (April 2013, May 2015)
Habitability of red dwarf systemsLow C2 April 2017References needed (April 2017), Clarification needed (July 2017)
Hakkı Boran ÖgelmanUnknown Start1 December 2013In-text citations lacking (December 2013)
Halley's CometTop FA1 2015Potentially dated statements (2015)
Halo mass functionLow Stub1 October 2013Sources lacking (October 2013)
Halton ArpMid Start1 Citation has redundant parameters
Hamid M.K. Al-NaimiyLow C3 October 2011Orphaned (February 2012), Unsourced statements (October 2011), BLP articles lacking sources (October 2011)
Hampstead Scientific SocietyLow Start1 January 2017Reliable references lacking (January 2017)
Handbook of 809Unknown Stub1 March 2014In-text citations lacking (March 2014)
Hannes AlfvénUnknown C2 December 2015Unsourced statements (December 2015), Vague or ambiguous time (December 2015)
Hans Adolf BuchdahlLow Start2 June 2013Clarification needed (June 2013), Unsourced statements (May 2017)
Harald LeschLow Start2 March 2009BLP articles lacking sources (March 2009), Unsourced statements (July 2017)
Harald SchenkLow Stub2 February 2009Orphaned (February 2009), BLP articles lacking sources (January 2011)
HaridattaUnknown Start1 Citation with accessdate and no URL
Harlan James SmithMid Start1 March 2013In-text citations lacking (March 2013)
Harlow ShapleyMid Start2 April 2017Web citation with no URL, Unsourced statements (April 2017)
Haro 11Mid C1 CS1 errors: dates
Harold JacobyMid Stub1 March 2009References needed (March 2009)
Harold ZirinMid Start2 January 2012Unsourced statements (January 2012), Reliable references lacking (January 2012)
Hartebeesthoek Radio Astronomy ObservatoryLow Start1 2011Potentially dated statements (2011)
Harvard ComputersLow Start3 January 2017Page number citations needed (January 2017), Vague or ambiguous time (October 2017), Sections needed (October 2017)
Harvard–Smithsonian Center for AstrophysicsMid Start1 August 2009Unsourced statements (August 2009)
HaumeaMid FA2 2008Potentially dated statements (2008, May 2009)
Hayabusa Mk2Low Start1 May 2012References needed (May 2012)
Haystack ObservatoryLow Start1 January 2012Potentially dated statements (January 2012)
Heat death of the universeHigh C2 November 2015Unsourced statements (November 2015, August 2016)
Heat death paradoxLow Stub1 November 2009References needed (November 2009)
Heather CouperMid Start3 December 2010Reliable references lacking (December 2010), BLP articles lacking sources (December 2010), IMDb sourced (December 2010)
Heavens-AboveLow Start1 March 2012Potentially dated statements (March 2012)
Hebrew astronomyMid C4 October 2007Expert attention needed (October 2007), Unsourced statements (February 2011, November 2014)
Hector J. Robinson ObservatoryLow Start2 June 2011References needed (June 2011), Unsourced statements (July 2011)
Heidi HammelUnknown Stub1 November 2012BLP articles lacking sources (November 2012)
Heinrich Christian SchumacherMid Start1 January 2014In-text citations lacking (January 2014)
Heinrich SchwabeMid Start1 February 2012In-text citations lacking (February 2012)
Heinrich Wilhelm Matthias OlbersMid Start1 February 2012In-text citations lacking (February 2012)
Helen LinesLow Stub2 January 2016References needed (January 2016), Notability unclear (January 2016)
HeliocentrismMid B5 September 2010Unsourced statements (April 2012, April 2017), Page number citations needed (September 2010, May 2011), Year an event occurred needed (April 2017)
HelioscopeLow Stub1 CS1 errors: external links
HeliosphereMid C2 December 2014Unsourced statements (December 2014), Clarification needed (June 2015)
Heliospheric imagerLow Stub2 June 2017Orphaned (June 2017), Sources lacking (June 2017)
Helium flashHigh Start1 February 2016Unsourced statements (February 2016)
Helium planetLow Stub1 August 2015Unsourced statements (August 2015)
Hen 2-10Low Stub3 June 2017Citation with accessdate and no URL, Clarification needed (June 2017), Weasel-worded phrases (June 2017)
Hen 2-437Unknown Stub1 September 2017Orphaned (September 2017)
Henize 206Low Start2 November 2010Cleanup needed (November 2010, November 2010)
Henri ChrétienMid Start1 May 2012Unsourced statements (May 2012)
Henyey trackHigh Start2 August 2010References needed (August 2010), Reference cleanup (August 2010)
Herbert FriedmanMid Start1 March 2013References needed (March 2013)
Herbert GurskyMid Start1 June 2011Expansion needed (June 2011)
Herbig Ae/Be starMid Start1 CS1 errors: external links
Herbig–Haro objectHigh C3 November 2010References needed (November 2010), Unsourced statements (November 2010), Expansion needed (July 2013)
Hercules (crater)Low Start1 October 2014Weasel-worded phrases (October 2014)
Hercules–Corona Borealis Great WallMid C1 January 2014Unsourced statements (January 2014)
Hermann Carl VogelUnknown Stub1 March 2013References needed (March 2013)
Hermann StruveUnknown Start1 April 2015References needed (April 2015)
Herschel 400 CatalogueLow Start1 April 2017Dead external links (April 2017)
Herschel Space ObservatoryHigh B1 2010Potentially dated statements (2010)
Hertzsprung gapMid Stub1 June 2016Failed verification (June 2016)
Hertzsprung–Russell diagramTop C1 August 2009Unsourced statements (August 2009)
HiWish programBottom Stub1 April 2017Dead external links (April 2017)
High Accuracy Radial Velocity Planet SearcherMid C1 June 2009Unsourced statements (June 2009)
High Altitude Venus Operational ConceptUnknown Stub1 August 2016Unsourced statements (August 2016)
High-velocity cloudUnknown Start2 April 2013Cleanup needed (April 2013, April 2013)
Hill sphereMid C1 November 2016Unsourced statements (November 2016)
Hills cloudMid C5 January 2009Unsourced statements (January 2009, February 2016), Cleanup needed (February 2016, February 2016), Clarification needed (February 2016)
HipparchusHigh B4 May 2017CS1 errors: dates, Unsourced statements (May 2017), External link cleanup (May 2017), Spam cleanup (May 2017)
HipparcosHigh C1 September 2012References needed (September 2012)
Historically significant solar eclipsesUnknown List2 April 2016Orphaned (April 2016), Merge needed (January 2017)
History of EarthHigh B4 March 2013Unsourced statements (March 2013, March 2016, January 2016), Page number citations needed (May 2016)
History of Solar System formation and evolution hypothesesLow B1 April 2008Unsourced statements (April 2008)
History of X-ray astronomyHigh Start2 September 2011Unsourced statements (September 2011), CS1 errors: dates
History of astronomyHigh B3 November 2009Clarification needed (November 2009), Page number citations needed (September 2010), Weasel-worded phrases (May 2017)
History of supernova observationMid GA2 Citation with accessdate and no URL, URL error
History of the Big Bang theoryHigh B4 September 2008References needed (September 2008), Unsourced statements (January 2012, May 2010, May 2011)
History of the center of the UniverseMid C2 September 2011Unsourced statements (September 2011), Clarification needed (March 2014)
Hitomi (satellite)Mid Start1 March 2016Unsourced statements (March 2016)
Hoag's ObjectMid C1 February 2007Unsourced statements (February 2007)
Holmberg 15AUnknown Stub1 August 2015References needed (August 2015)
Hommel (crater)Low Start1 April 2017Dead external links (April 2017)
Hong Kong ObservatoryLow Start2 December 2013Unsourced statements (October 2015), References needed (December 2013)
Hoober ObservatoryBottom Start4 August 2009References needed (August 2009), Dead external links (October 2010), Conflict of interest (September 2012), Notability unclear (May 2017)
Horace W. BabcockMid Stub1 February 2011References needed (February 2011)
HorizonTop C4 December 2011Disputed statements (December 2011), Expansion needed (June 2013), References needed (June 2013), Links needing disambiguation (December 2016)
Horologium SuperclusterLow Stub1 January 2008References needed (January 2008)
Horsehead NebulaMid Start1 January 2017Unsourced statements (January 2017)
How the Universe WorksUnknown Start1 November 2016Rewrite needed (November 2016)
Hubble Deep Field SouthMid Start1 December 2008Unsourced statements (December 2008)
Hubble Space TelescopeHigh FA2 September 2017Potentially dated statements (2017), Dead external links (September 2017)
Hubble Ultra-Deep FieldMid Start2 April 2017Clarification needed (April 2017), Reliable references lacking (April 2017)
Hubble sequenceHigh B1 May 2016Unsourced statements (May 2016)
Hubble's lawTop B3 July 2009Unsourced statements (July 2009), Accuracy disputes (December 2013), References needed (March 2014)
Hubble–Reynolds lawLow Stub1 September 2017References needed (September 2017)
Hubert ReevesUnknown Start1 March 2015Expansion needed (March 2015)
Huchra's lensLow Stub1 January 2012References needed (January 2012)
Hungarian Astronautical SocietyLow Start2 March 2017Notability unclear (March 2017), Reliable references lacking (March 2017)
Hyde Memorial ObservatoryLow Stub1 October 2015In-text citations lacking (October 2015)
Hyder flareUnknown C1 May 2016Orphaned (May 2016)
Hydra (constellation)Top Start2 November 2011Unsourced statements (November 2011), Page number citations needed (August 2012)
Hydrogen lineHigh Start1 September 2008References needed (September 2008)
Hydrostatic equilibriumHigh C1 May 2010References needed (May 2010)
HypatiaMid B5 April 2015Unsourced statements (April 2015), Weasel-worded phrases (April 2015), Dead external links (August 2016, June 2017), References needed (January 2017)
HypergiantHigh C1 Citation with format and no URL
HypergravityLow Stub1 Detailed references needed
Hyrrokkin (moon)Low Stub1 April 2015In-text citations lacking (April 2015)
Hōei NojiriUnknown Stub2 February 2009Expansion needed (February 2009), References needed (November 2015)
IAU CircularMid Start1 March 2017References needed (March 2017)
IAU definition of planetHigh GA3 February 2017CS1 errors: external links, Unsourced statements (February 2017, April 2017)
IC 10Low Start1 February 2007Unsourced statements (February 2007)
IC 1011Low Stub1 January 2015Orphaned (January 2015)
IC 1059Low Stub2 February 2009Orphaned (February 2009), Notability unclear (March 2012)
IC 1101Low Start1 Detailed references needed
IC 1517Low Stub1 February 2013Orphaned (February 2013)
IC 1838Low Stub2 October 2008Sources lacking (October 2008), Orphaned (February 2009)
IC 289Low Stub2 July 2016Unsourced statements (July 2016), References needed (April 2017)
IC 3418Low Stub1 February 2013Orphaned (February 2013)
IC 342/Maffei GroupMid C1 February 2007Unsourced statements (February 2007)
IC 418Low Stub1 February 2007Unsourced statements (February 2007)
IC 434Low Stub1 June 2015Expansion needed (June 2015)
IC 4406Low Stub1 February 2007Unsourced statements (February 2007)
IC 447Low Stub1 February 2009Orphaned (February 2009)
IC 5332Unknown Stub1 August 2016Orphaned (August 2016)
IC 5351Low Stub1 February 2009Orphaned (February 2009)
IC 5357Low Stub1 February 2009Orphaned (February 2009)
II Zwicky 73Low Stub1 March 2014In-text citations lacking (March 2014)
IKAROSLow C2 March 2016Update needed (March 2016), Dead external links (December 2016)
INTEGRALMid Start2 January 2015Potentially dated statements (January 2015), Expansion needed (September 2015)
IPTF 14atgUnknown Stub1 January 2016Orphaned (January 2016)
IRAFUnknown Start2 February 2017Unsourced statements (February 2017, July 2017)
IRAS 12063-6259Low Start1 December 2010Orphaned (December 2010)
IU AurigaeLow Stub1 March 2017References needed (March 2017)
Ian MorisonUnknown Start1 November 2013BLP articles lacking sources (November 2013)
Ian RidpathLow Start1 April 2014BLP articles lacking sources (April 2014)
Iapetus (moon)High B1 September 2007Unsourced statements (September 2007)
Ibn Abi al-ShukrMid Start1 April 2017Merge needed (April 2017)
Ibn al-HaythamMid B5 June 2009Detailed references needed, Factual verification needed (June 2009, February 2016), Dead external links (February 2016), Weasel-worded phrases (October 2017)
Icarus (crater)Low Start1 May 2014In-text citations lacking (May 2014)
Ice giantMid C1 September 2017Unsourced statements (September 2017)
Ice planetUnknown Start2 May 2014References needed (May 2014), Disputed statements (September 2015)
Icko IbenUnknown Stub1 February 2013In-text citations lacking (February 2013)
Icy moonHigh Start2 February 2012Unsourced statements (February 2013), Disputed statements (February 2012)
Igor Dmitriyevich NovikovMid Start1 April 2017Unreferenced BLPs (April 2017)
Ijiraq (moon)Low Start2 July 2015Cleanup needed (July 2015, July 2015)
Image-forming optical systemUnknown Stub1 April 2008References needed (April 2008)
Impact craterHigh C1 January 2008References needed (January 2008)
Impact eventHigh B5 December 2013Unsourced statements (February 2015, December 2013, April 2016), Disputed statements (January 2017), Accuracy disputes (February 2017)
Impact survivalUnknown Start2 May 2013Cleanup needed (May 2013, May 2013)
Inclined orbitLow Start1 November 2015References needed (November 2015)
Indian Initiative in Gravitational-wave ObservationsLow Stub1 Coordinates needed
Indian Venusian orbiter missionUnknown Stub2 September 2017CS1 errors: external links, Unsourced statements (September 2017)
Inflation (cosmology)High C6 November 2012Unsourced statements (May 2014, October 2014), Clarification needed (November 2012, June 2014), References needed (November 2016), DOIs inactive (2017)
Infrared Science ArchiveLow Stub2 April 2014Reliable references lacking (April 2014), Potentially dated statements (June 2014)
Infrared cirrusMid Stub1 June 2014References needed (June 2014)
Infrared dark cloudMid Start1 December 2010Expansion needed (December 2010)
Infrared excessLow Stub1 November 2013Expansion needed (November 2013)
Initiative for Interstellar StudiesUnknown Start1 August 2014Promotional tone (August 2014)
Innermost stable circular orbitUnknown Stub1 January 2016References needed (January 2016)
Instability stripHigh Start1 November 2009References needed (November 2009)
Institut d'astrophysique de ParisLow Stub2 October 2012References needed (October 2012), Reliable references lacking (October 2012)
Institut de mécanique céleste et de calcul des éphéméridesMid Stub1 December 2009Reliable references lacking (December 2009)
Institute of Astronomy of the Bulgarian Academy of SciencesLow Stub2 April 2017Vague or ambiguous time (April 2017), Sources lacking (April 2017)
Integral field spectrographMid Start1 August 2011References needed (August 2011)
Integrated Flux NebulaLow Stub1 March 2017References needed (March 2017)
Intensity interferometerMid Start1 July 2007Sources lacking (July 2007)
InterPlanetary NetworkMid C2 November 2009References needed (November 2009), Unsourced statements (November 2011)
Interacting galaxyHigh Start1 May 2009References needed (May 2009)
Interface Region Imaging SpectrographMid Start1 Citation has redundant parameters
Intergalactic starMid Start1 July 2017Update needed (July 2017)
Intermediate polarMid C1 January 2017References needed (January 2017)
Intermediate spiral galaxyLow Stub2 December 2006References needed (December 2006), Expansion needed (April 2010)
Intermediate-mass black holeMid Start2 February 2014Unsourced statements (February 2014, June 2017)
International Astronomical Naming CommissionMid Start3 June 2010Sources lacking (June 2010), Weasel-worded phrases (March 2012), Update needed (March 2012)
International Astronomical Youth CampBottom Start1 October 2009References needed (October 2009)
International Center for Relativistic AstrophysicsLow Start1 October 2016References needed (October 2016)
International Centre for Radio Astronomy ResearchLow Start1 March 2015Promotional tone (March 2015)
International Latitude ObservatoryLow Start1 September 2014References needed (September 2014)
International Planetarium SocietyBottom Start1 June 2016Wikilinks needed (June 2016)
International Scientific Optical NetworkLow Stub1 January 2013References needed (January 2013)
International X-ray ObservatoryLow Start2 October 2014Cleanup needed (October 2014, October 2014)
Interplanetary contaminationLow B1 June 2016Update needed (June 2016)
Interplanetary dust cloudLow Start4 November 2015Unsourced statements (November 2015), Citation with bare URL, Citation lacking title, CS1 errors: dates
Interplanetary magnetic fieldMid Start1 December 2016References needed (December 2016)
Interplanetary mediumMid C2 July 2007References needed (July 2007), Unsourced statements (January 2014)
Interstellar Boundary ExplorerMid C2 July 2013Update needed (July 2013), Unsourced statements (August 2015)
Interstellar mediumTop B1 January 2016Unsourced statements (January 2016)
Intihuatana, UrubambaLow Start1 Coordinates needed
Io (moon)Top FA1 October 2017Dead external links (October 2017)
Iocaste (moon)Low Stub1 April 2016Dead external links (April 2016)
IonosphereLow B4 October 2013Unsourced statements (February 2015, December 2015, September 2016), Expansion needed (October 2013)
Iota AquilaeLow Start1 July 2017Unsourced statements (July 2017)
Iota AurigaeMid C1 January 2012Unsourced statements (January 2012)
Iota CentauriMid C1 August 2013Reliable references lacking (August 2013)
Iota CrucisLow Stub1 May 2010Unsourced statements (May 2010)
Iota GeminorumLow Start1 December 2016Unsourced statements (December 2016)
Iota HorologiiLow C1 October 2017Unsourced statements (October 2017)
Iota PerseiLow Stub2 June 2017Unsourced statements (June 2017), Vague or ambiguous time (June 2017)
Iota Piscis AustriniLow Start1 May 2017Reliable references lacking (May 2017)
Iota SerpentisLow Stub1 February 2016References needed (February 2016)
Irish Astronomical SocietyMid Start1 February 2011Clarification needed (February 2011)
Irish Federation of Astronomical SocietiesLow Stub1 July 2010Expansion needed (July 2010)
Iron meteoriteMid C1 CS1 errors: chapter ignored
Iron(I) hydrideLow C1 February 2013Unsourced statements (February 2013)
Irregular mare patchMid Start1 CS1 errors: external links
Irregular variableMid Stub1 December 2009References needed (December 2009)
Isaac NewtonTop GA3 August 2014Page number citations needed (August 2014), Unsourced statements (March 2017), Dead external links (June 2017)
Isaac Roberts' ObservatoryUnknown Start2 September 2015Clarification needed (September 2015), Weasel-worded phrases (September 2015)
Iso-Heikkilä ObservatoryLow Start1 September 2017In-text citations lacking (September 2017)
Isoplanetic patchLow Stub4 October 2010Expert attention needed (October 2010), Too technical (October 2010), Orphaned (December 2012)
Issei YamamotoUnknown Stub1 January 2009Sources lacking (January 2009)
J. Allen HynekUnknown B5 February 2008References needed (February 2008), Unsourced statements (August 2010, December 2010), Reliable references lacking (April 2015), Weasel-worded phrases (July 2015)
J. Richard FisherUnknown Stub1 September 2013Unsourced statements (September 2013)
J. Ward MoodyUnknown Stub1 December 2014Orphaned (December 2014)
JCPM Yakiimo StationLow Stub1 November 2015Sources lacking (November 2015)
JP11Low Stub1 June 2017Notability unclear (June 2017)
JPL Horizons On-Line Ephemeris SystemLow Start2 October 2014Reliable references lacking (October 2014), Merge needed (February 2016)
JPL Small-Body DatabaseLow Stub2 February 2016Merge needed (February 2016), Unsourced statements (July 2017)
Jack HorkheimerLow Start2 December 2010Introduction cleanup (December 2010), Dead external links (May 2017)
Jackson-Gwilt MedalMid List3 September 2017Tables needed (September 2017), Cleanup needed (September 2017), List cleanup (September 2017)
Jacques CassiniMid Start2 February 2012References needed (February 2012), In-text citations lacking (February 2012)
James Curley (astronomer)Low Start1 May 2014In-text citations lacking (May 2014)
James DunlopLow C2 September 2009In-text citations lacking (September 2009), Unsourced statements (September 2009)
James GallLow Start1 July 2007References needed (July 2007)
James Lindsay, 26th Earl of CrawfordLow Start1 February 2012Vague or ambiguous time (February 2012)
James Maxime DuPontMid Stub2 May 2010Cleanup needed (May 2010, May 2010)
James McMahon (astronomer)Low Stub2 January 2016Unreferenced BLPs (January 2016), Notability unclear (January 2016)
James V. ScottiLow Start1 August 2009BLP articles lacking sources (August 2009)
James Webb Space TelescopeHigh B3 September 2010Dead external links (September 2010, May 2017), Potentially dated statements (September 2017)
Jamshīd al-KāshīUnknown Start2 January 2016Citation with accessdate and no URL, Unsourced statements (January 2016)
Jane LuuLow B1 May 2017Unsourced statements (May 2017)
Janet Akyüz MatteiUnknown Start1 URL error
Janus (moon)Low C2 December 2012Unsourced statements (December 2012), In-text citations lacking (January 2016)
Jean Baptiste Joseph DelambreUnknown Start1 November 2009In-text citations lacking (November 2009)
Jean FocasMid Stub1 December 2009Sources lacking (December 2009)
Jean Le Fèvre (astronomer)Low Stub1 January 2012Expansion needed (January 2012)
Jean-Louis PonsUnknown Stub1 July 2013References needed (July 2013)
Jeanne DuméeUnknown Stub2 November 2014URL error, Expansion needed (November 2014)
Jeff KanipeLow Stub1 March 2016Orphaned (March 2016)
Jeffrey Owen KatzUnknown Start1 June 2014Reliable references lacking (June 2014)
Jeffrey S. MedkeffLow Start1 July 2016Unsourced statements (July 2016)
Jenny GreeneLow Stub1 June 2016Notability unclear (June 2016)
Jens Martin KnudsenLow Stub2 December 2009References needed (December 2009), Unsourced statements (September 2011)
Jeremy Walsh (astronomer)Mid Stub1 September 2013BLP articles lacking sources (September 2013)
Jesse L. GreensteinUnknown Stub1 October 2011References needed (October 2011)
Jet Propulsion LaboratoryMid C2 June 2016Web citation with no URL, Dead external links (June 2016)
Jet Propulsion Laboratory Science DivisionMid Start1 June 2011References needed (June 2011)
Jiao BingzhenUnknown Stub1 May 2014References needed (May 2014)
Jiun-Huei Proty WuUnknown Start1 January 2015Orphaned (January 2015)
Jocelyn Bell BurnellMid C5 December 2015Unsourced statements (April 2016, November 2016), External link cleanup (December 2015), Spam cleanup (December 2015), CS1 errors: external links
Jodrell Bank ObservatoryHigh GA1 June 2015Clarification needed (June 2015)
Joel Hastings MetcalfLow Stub1 January 2016Dead external links (January 2016)
Johann Adam Schall von BellMid Start1 March 2014In-text citations lacking (March 2014)
Johann Daniel TitiusLow Start2 August 2015Citation with accessdate and no URL, Unsourced statements (August 2015)
Johann Gottfried GalleMid Start1 September 2012References needed (September 2012)
Johann GrueberLow C1 May 2014In-text citations lacking (May 2014)
Johann Heinrich HoffmannUnknown Stub1 January 2015Clarification needed (January 2015)
Johann Heinrich WestphalUnknown Stub1 December 2009Sources lacking (December 2009)
Johann Heinrich von MädlerLow Start1 November 2007Unsourced statements (November 2007)
Johannes KeplerHigh FA1 September 2017Dead external links (September 2017)
John August AndersonMid Stub1 June 2008Sources lacking (June 2008)
John Brinkley (astronomer)Mid Start1 URL error
John Browning (scientific instrument maker)Mid Start2 Web citation with no URL, Citation with accessdate and no URL
John C. MatherUnknown Start1 April 2017Dead external links (April 2017)
John CarlstromLow Stub1 February 2013BLP articles lacking sources (February 2013)
John E. GeakeLow Start1 July 2017Notability unclear (July 2017)
John Francis SkjellerupUnknown Stub1 January 2013Sources lacking (January 2013)
John HerschelHigh C1 September 2017References needed (September 2017)
John Louis Emil DreyerMid Start1 April 2017Unsourced statements (April 2017)
John M. ThomeUnknown Stub1 June 2016References needed (June 2016)
John N. BahcallUnknown Start2 February 2013Unsourced statements (October 2014), References needed (February 2013)
John WinthropLow GA4 April 2012Unsourced statements (April 2012, October 2016), References needed (October 2015, October 2016)
John ZarneckiMid Start1 April 2012Unsourced statements (April 2012)
Joint Dark Energy MissionLow Start3 November 2008Cleanup needed (November 2008, November 2008), Update needed (December 2015)
Joseph Brown (astronomer)Low Start1 September 2014References needed (September 2014)
Joseph Gurney Barclay (astronomer)Unknown Start2 Citation with bare URL, Citation lacking title
Joseph Hooton Taylor Jr.High C1 February 2013BLP articles lacking sources (February 2013)
Joseph Jean Pierre LaurentLow Start1 March 2017Dead external links (March 2017)
Joseph VeverkaLow Start1 April 2017Dead external links (April 2017)
Joseph von FraunhoferHigh C2 July 2017References needed (July 2017), Copy edit needed (July 2017)
Joseph-Louis LagrangeHigh B2 February 2008Unsourced statements (February 2008), Factual verification needed (April 2015)
José De QueirozLow Stub1 June 2016Unsourced statements (June 2016)
Journey Through the Solar SystemUnknown Stub2 September 2014Sources lacking (September 2014), Orphaned (December 2014)
Jovian–Plutonian gravitational effectLow Start1 December 2013References needed (December 2013)
Judith PipherLow Start1 August 2017Unsourced statements (August 2017)
Julio Garavito ArmeroUnknown Stub2 October 2008Unsourced statements (October 2008), References needed (November 2014)
Julio Navarro (astrophysicist)Mid Stub1 May 2010BLP articles lacking sources (May 2010)
Junk Bond ObservatoryLow Stub1 January 2013References needed (January 2013)
JupiterTop FA4 May 2015Potentially dated statements (2017, 2015), Page number citations needed (May 2015), Factual verification needed (October 2017)
Jupiter Icy Moons OrbiterLow Start1 June 2007Unsourced statements (June 2007)
Jupiter trojanMid FA4 2007Potentially dated statements (2007, February 2014, May 2017), Dead external links (September 2017)
Juraj TóthLow Stub1 July 2016Unsourced statements (July 2016)
Jérôme LalandeUnknown Start1 February 2017Page number citations needed (February 2017)
Jørgen Christensen-DalsgaardMid Start1 August 2011Dead external links (August 2011)
K PuppisLow Start2 February 2015References needed (February 2015), Unsourced statements (March 2017)
K'àak' Chi'Low Start1 February 2017Unsourced statements (February 2017)
K. C. PaulLow Start2 August 2013Potentially dated statements (August 2013), Orphaned (December 2014)
K2-72Low Start1 April 2017Unsourced statements (April 2017)
KARSTLow Stub1 December 2016Merge needed (December 2016)
KELT-2ALow Stub1 June 2017References needed (June 2017)
KOI-2124.01Low Stub2 August 2015References needed (August 2015), Orphaned (October 2016)
KOI-7296.01Low Stub3 April 2016References needed (April 2016), Notability unclear (April 2016), Original research (April 2016)
KOI-7599.01Low Stub2 April 2016References needed (April 2016), Notability unclear (April 2016)
KOI-7617.01Low Stub4 August 2015References needed (August 2015, April 2016), Notability unclear (April 2016), Orphaned (July 2016)
KW SagittariiLow Start1 October 2016Unsourced statements (October 2016)
Kaoru IkeyaMid Stub1 December 2010BLP articles lacking sources (December 2010)
Kappa AraeLow Start1 July 2012Unsourced statements (July 2012)
Kappa Coronae BorealisLow Start1 October 2017Unsourced statements (October 2017)
Kappa DraconisLow Start1 February 2017Unsourced statements (February 2017)
Kappa HerculisLow Start1 April 2017Unsourced statements (April 2017)
Kappa PyxidisLow Stub1 July 2017Reliable references lacking (July 2017)
Kappa Ursae MajorisLow Stub1 May 2017Unsourced statements (May 2017)
Kappa VelorumMid Start1 January 2012Unsourced statements (January 2012)
Kappa1 CetiMid C1 January 2011Unsourced statements (January 2011)
Kappa2 Coronae AustralisLow Start1 October 2012In-text citations lacking (October 2012)
Kapteyn Astronomical InstituteLow Start1 March 2015Sources lacking (March 2015)
Kardashev scaleMid B1 July 2014Unsourced statements (July 2014)
Kari (moon)Low Stub1 May 2017Dead external links (May 2017)
Karl Christian BruhnsMid Stub1 May 2013In-text citations lacking (May 2013)
Karl G. Jansky Very Large ArrayHigh B3 March 2015Unsourced statements (February 2016, March 2015, July 2017)
Karl Schwarzschild ObservatoryMid Stub1 January 2015References needed (January 2015)
Karl von WeizsäckerUnknown Stub1 October 2013Sources lacking (October 2013)
Kavan RatnatungaLow Start5 July 2017Unsourced statements (July 2017), Promotional tone (July 2017), Notability unclear (July 2017), BLP articles lacking sources (July 2017), Introduction cleanup (July 2017)
Kavasji NaegamvalaUnknown Start1 January 2017Orphaned (January 2017)
Keith Runcorn PrizeBottom List3 January 2017List cleanup (January 2017), Tables needed (January 2017), Cleanup needed (January 2017)
Kelle CruzLow Start2 February 2014Orphaned (January 2015), Notability unclear (February 2014)
Ken CroswellLow Stub1 April 2015Incomplete lists (April 2015)
Kent CullersMid Start2 March 2011BLP articles lacking sources (March 2011), References needed (April 2015)
Kent Ford (astronomer)Unknown Stub1 March 2013BLP articles lacking sources (March 2013)
Kepler (spacecraft)High C8 October 2010Potentially dated statements (2012, October 2010, January 2015, January 2012, June 2017), Unsourced statements (October 2015, May 2016), References needed (March 2017)
Kepler Follow-up ProgramLow Stub1 June 2012References needed (June 2012)
Kepler de Souza OliveiraLow Stub1 March 2017Notability unclear (March 2017)
Kepler object of interestMid C3 June 2014Update needed (June 2014), Unsourced statements (December 2015), CS1 errors: external links
Kepler-10Mid GA1 2014Potentially dated statements (2014)
Kepler-10bMid GA1 March 2014Clarification needed (March 2014)
Kepler-1229Low Start1 July 2016Unsourced statements (July 2016)
Kepler-1606bUnknown Stub2 September 2016Wikilinks needed (September 2016), References needed (December 2016)
Kepler-17Low Stub1 Citation with accessdate and no URL
Kepler-182Low Stub1 January 2016Orphaned (January 2016)
Kepler-186fMid C1 May 2016Unsourced statements (May 2016)
Kepler-20eLow Stub1 December 2015References needed (December 2015)
Kepler-223Low Start2 February 2011Cleanup needed (February 2011, February 2011)
Kepler-22bMid C2 May 2013Unsourced statements (May 2013), Clarification needed (September 2015)
Kepler-23bLow Stub1 April 2015Unsourced statements (April 2015)
Kepler-24cLow Stub1 Citation with accessdate and no URL
Kepler-24dLow Stub1 Citation with accessdate and no URL
Kepler-24eLow Stub1 Citation with accessdate and no URL
Kepler-296eUnknown Stub1 January 2015Unsourced statements (January 2015)
Kepler-296fUnknown Stub1 January 2015Unsourced statements (January 2015)
Kepler-32Low Stub1 Citation with accessdate and no URL
Kepler-32bLow Stub1 August 2013Accuracy disputes (August 2013)
Kepler-345bUnknown Stub2 June 2015Expert attention needed (June 2015)
Kepler-34bLow Stub1 July 2012Sources lacking (July 2012)
Kepler-35Mid Start1 Citation with accessdate and no URL
Kepler-371bLow Stub1 April 2017References needed (April 2017)
Kepler-37bLow Start2 February 2013Potentially dated statements (February 2013), Unsourced statements (March 2014)
Kepler-41Low Stub1 Citation with accessdate and no URL
Kepler-42Mid Start1 October 2012Unsourced statements (October 2012)
Kepler-438Low Stub1 Citation with accessdate and no URL
Kepler-452Mid Start2 April 2017Unsourced statements (April 2017), Original research (April 2017)
Kepler-46Low Start2 May 2013Unsourced statements (May 2013), Dead external links (May 2017)
Kepler-4bLow GA1 CS1 errors: external links
Kepler-5Low GA1 Citation with accessdate and no URL
Kepler-56Low C1 June 2014Unsourced statements (June 2014)
Kepler-6Low GA2 Citation with accessdate and no URL, CS1 errors: dates
Kepler-65Unknown Stub1 June 2013References needed (June 2013)
Kepler-66Unknown Stub1 August 2017In-text citations lacking (August 2017)
Kepler-67Unknown Stub1 August 2017In-text citations lacking (August 2017)
Kepler-84Low C2 April 2017Clarification needed (April 2017), Weasel-worded phrases (April 2017)
Kepler-86Mid Start1 May 2017Dead external links (May 2017)
Kepler-87cUnknown Stub1 October 2013References needed (October 2013)
Kepler-88Low C2 March 2017Citation with accessdate and no URL, References needed (March 2017)
Kepler-89eLow Stub1 September 2017Original research (September 2017)
Kepler-9Mid GA1 CS1 errors: external links
Kepler-90Mid Start1 Citation with accessdate and no URL
Kerry International Dark-Sky ReserveLow Start5 May 2017Coordinates needed, Promotional tone (May 2017), Sections needed (May 2017), Peacock terms (May 2017), Reliable references lacking (May 2017)
Kevola ObservatoryLow Start1 September 2017In-text citations lacking (September 2017)
Khagol VishwaLow Start3 October 2009Cleanup needed (October 2009, October 2009), Vague or ambiguous time (December 2015)
Kielder Forest Star CampLow Stub1 April 2016Orphaned (April 2016)
Kilodegree Extremely Little TelescopeLow C1 November 2013References needed (November 2013)
Kim WeaverLow Start2 January 2017BLP articles lacking sources (January 2017), Dead external links (January 2017)
Kip ThorneUnknown B4 2005Potentially dated statements (2005), Vague or ambiguous time (October 2017), References needed (October 2017), Unsourced statements (October 2017)
Kiyotsugu HirayamaMid Stub1 August 2010In-text citations lacking (August 2010)
Kleť ObservatoryMid Start1 October 2011Unsourced statements (October 2011)
Knut Jørgen Røed ØdegaardUnknown Stub1 May 2009BLP articles lacking sources (May 2009)
Knut LundmarkUnknown Start1 May 2007References needed (May 2007)
Konkoly ObservatoryLow Stub1 August 2017Introduction cleanup (August 2017)
Korado KorlevićLow Start1 August 2017References needed (August 2017)
Kraft breakLow Stub1 July 2017Orphaned (July 2017)
Kraus-type radio telescopeLow Stub1 December 2009Sources lacking (December 2009)
Kreutz sungrazerMid FA1 2017DOIs inactive (2017)
Kruger 60Low Start1 September 2009Unsourced statements (September 2009)
Krusenstern (crater)Low Start1 May 2016Dead external links (May 2016)
Kubrick MonsUnknown Stub1 October 2016Unsourced statements (October 2016)
Kurt AdelbergerUnknown Stub1 October 2017Orphaned (October 2017)
Kyle E. SmalleyLow Stub2 January 2016BLP articles lacking sources (January 2016), Notability unclear (January 2016)
Kyongae ChangUnknown Stub1 September 2016Unsourced statements (September 2016)
Károly NagyLow Stub1 March 2008Sources lacking (March 2008)
KṛttikāLow Start1 July 2007References needed (July 2007)
L183Low Stub1 September 2017Unsourced statements (September 2017)
LAE J095950.99+021219.1Low Stub1 January 2015Orphaned (January 2015)
LBN 114.55+00.22Low Start1 February 2013Orphaned (February 2013)
LHS 292Low Stub1 CS1 errors: external links
LHS 3003Low Stub1 May 2017References needed (May 2017)
LHS 6343Low Start1 Citation with accessdate and no URL
LOFARLow C4 November 2015Unsourced statements (November 2015, July 2016), External link cleanup (June 2017), Spam cleanup (June 2017)
LRLL 54361Low Start1 January 2017References needed (January 2017)
LS I +61 303Low Stub1 September 2017References needed (September 2017)
LacertaMid Start2 November 2011Unsourced statements (November 2011), Disputed statements (February 2014)
Lagrangian pointTop C5 2013Potentially dated statements (2017, 2013, 2015, 2016), Update needed (April 2017)
Lake Murray MeteoriteLow Start1 Coordinates needed
Lalande 21185Mid C2 June 2012Unsourced statements (June 2012, May 2015)
Lalande PrizeMid List1 April 2014References needed (April 2014)
Lambda AquilaeMid C1 July 2017Unsourced statements (July 2017)
Lambda CassiopeiaeLow Stub1 May 2017References needed (May 2017)
Lambda CentauriMid C1 November 2016Unsourced statements (November 2016)
Lambda ChamaeleontisLow Stub1 August 2017Unsourced statements (August 2017)
Lambda EquuleiLow Stub1 February 2017Unsourced statements (February 2017)
Lambda Piscis AustriniLow Start1 May 2017Reliable references lacking (May 2017)
Lambda-CDM modelHigh C1 CS1 errors: external links
Large Magellanic CloudTop C3 July 2015Unsourced statements (July 2015, March 2017), Weasel-worded phrases (March 2017)
Large Synoptic Survey TelescopeLow C3 January 2015Potentially dated statements (January 2015, November 2016), Links needing disambiguation (August 2017)
Laser Interferometer Space AntennaLow Start1 January 2017Unsourced statements (January 2017)
Late Heavy BombardmentMid C1 September 2008Unsourced statements (September 2008)
Laura A. LopezLow Start4 June 2016Unsourced statements (June 2016), References needed (June 2016), BLP articles lacking sources (June 2016), Orphaned (June 2016)
Laura Mersini-HoughtonLow Start2 January 2017Vague or ambiguous time (January 2017), Unsourced statements (January 2017)
Laurent NottaleMid Start2 August 2011Unsourced statements (August 2011), NPOV disputes (June 2016)
Lazarus cometLow Stub1 August 2013Orphaned (August 2013)
Leibniz Institute for Astrophysics PotsdamMid B1 Reference errors
Leiden ObservatoryMid Start2 August 2014Incomplete lists (August 2014), Merge needed (January 2017)
Leo (constellation)Top C3 2002Potentially dated statements (2002), External link cleanup (January 2016), Spam cleanup (January 2016)
Leo T (dwarf galaxy)Mid Start1 December 2014Clarification needed (December 2014)
Leonard L. AmburgeyLow Stub1 August 2016Unsourced statements (August 2016)
Leonardo da VinciMid GA1 August 2013Failed verification (August 2013)
LeonidsHigh C1 November 2012Unsourced statements (November 2012)
Letters on SunspotsMid Stub3 August 2017Page number citations needed (August 2017), External link cleanup (August 2017), Spam cleanup (August 2017)
Lewis (crater)Low Start1 September 2016In-text citations lacking (September 2016)
Li Fan (Han dynasty)Mid Stub1 May 2007Sources lacking (May 2007)
Libra (constellation)Mid Start2 2002Potentially dated statements (2002), Unsourced statements (November 2011)
Lick ObservatoryMid Start4 2003Potentially dated statements (2003), Unsourced statements (April 2009, August 2013, January 2014)
Life on MarsMid B9 June 2013Detailed references needed, Reliable references lacking (June 2013), Factual verification needed (June 2013), Page number citations needed (June 2013), Disputed statements (July 2013), CS1 errors: dates, Original research (August 2015), Unsourced statements (August 2015, January 2017)
Life on TitanMid B1 CS1 errors: external links
Life on VenusLow Start1 August 2015Reliable references lacking (August 2015)
Light pollutionHigh C6 December 2008References needed (December 2008, July 2010), Unsourced statements (November 2009, December 2011, February 2013, February 2017)
Light-yearHigh B1 October 2014Potentially dated statements (October 2014)
LightBucketsBottom Start3 September 2010Reliable references lacking (September 2010), Accuracy disputes (October 2010), Unsourced statements (April 2016)
Lincoln LaPazLow Start2 April 2015In-text citations lacking (April 2015), Unsourced statements (August 2017)
Lincoln Near-Earth Asteroid ResearchMid Start1 September 2011Potentially dated statements (September 2011)
Lindblad (crater)Low Start1 May 2016In-text citations lacking (May 2016)
List of Abell clustersLow List1 August 2008Incomplete lists (August 2008)
List of Arabic star namesMid List2 October 2011Year an event occurred needed (October 2011), Merge needed (November 2016)
List of Aten asteroidsLow List2 August 2015Potentially dated statements (August 2015, January 2017)
List of Gotland-related asteroidsLow List1 January 2008Potentially dated statements (January 2008)
List of Jupiter-crossing minor planetsLow List2 September 2012Incomplete lists (September 2012, November 2014)
List of Russian astronomers and astrophysicistsLow List1 February 2011Incomplete lists (February 2011)
List of Slovenian astronomersLow List1 March 2008Sources lacking (March 2008)
List of Solar System extremesLow List2 October 2015Incomplete lists (October 2015), CS1 errors: external links
List of Solar System objects most distant from the Sun in 2015Low List1 November 2015References needed (November 2015)
List of UDF objects (1–500)Low List1 November 2016Orphaned (November 2016)
List of X-ray pulsarsMid List1 February 2011Incomplete lists (February 2011)
List of adjectivals and demonyms of astronomical bodiesBottom List2 June 2010Unsourced statements (June 2010, July 2011)
List of astronomical instrument makersMid List1 October 2008Disputed statements (October 2008)
List of astronomical objects named after peopleLow List2 February 2011Incomplete lists (February 2011), Notability unclear (May 2012)
List of astronomical observatoriesMid List1 August 2008Incomplete lists (August 2008)
List of astronomy journalsLow List1 August 2008Incomplete lists (August 2008)
List of astronomy websitesMid List3 July 2012Potentially dated statements (July 2012), Incomplete lists (July 2012), Citation lacking title
List of black holesMid List1 August 2017Unsourced statements (August 2017)
List of brown dwarfsMid List4 February 2011Incomplete lists (February 2011), Potentially dated statements (2015), Update needed (March 2013), References needed (August 2015)
List of clustersLow List1 January 2015Orphaned (January 2015)
List of comets by typeMid List1 July 2014References needed (July 2014)
List of common misconceptionsMid List2 October 2011Page number citations needed (October 2011), Dead external links (October 2017)
List of coolest starsLow List3 October 2016Incomplete lists (October 2016, December 2016), References needed (December 2016)
List of coronal mass ejectionsLow List5 January 2012Sources lacking (January 2012), Clarification needed (January 2012), Introduction cleanup (January 2012), Context needed (January 2012), Update needed (January 2015)
List of cosmologistsMid List1 August 2008Incomplete lists (August 2008)
List of exceptional asteroidsLow List2 September 2016Potentially dated statements (September 2016), Unsourced statements (July 2017)
List of exoplanet extremesLow List2 2013Potentially dated statements (2013), Unsourced statements (March 2014)
List of exoplanet firstsLow List1 October 2015Unsourced statements (October 2015)
List of exoplanetary host starsMid List1 January 2013Update needed (January 2013)
List of exoplanetsLow List1 September 2017Potentially dated statements (September 2017)
List of exoplanets detected by microlensingLow List1 August 2014Update needed (August 2014)
List of exoplanets discovered using the Kepler spacecraftLow List2 January 2015Potentially dated statements (January 2015), Clarification needed (May 2016)
List of extrasolar candidates for liquid waterLow List1 April 2017Unsourced statements (April 2017)
List of extremes in the skyUnknown List4 July 2015References needed (July 2015), Clarification needed (July 2015), Introduction cleanup (July 2015), Orphaned (March 2016)
List of fast radio burstsUnknown List1 Citation lacking title
List of fast rotators (minor planets)Low List1 2017Potentially dated statements (2017)
List of galaxiesMid List3 September 2008Factual verification needed (September 2008), Clarification needed (April 2013), Unsourced statements (March 2017)
List of gamma-ray burstsLow List1 Reference errors
List of geological features on 21 LutetiaLow List1 CS1 errors: external links
List of geological features on 433 ErosLow List1 December 2016Links needing disambiguation (December 2016)
List of geological features on CharonUnknown List2 Web citation with no URL, Citation with accessdate and no URL
List of geological features on VestaLow List1 October 2015Sources lacking (October 2015)
List of globular clustersMid List2 August 2008Incomplete lists (August 2008, February 2011)
List of highest astronomical observatoriesLow List2 February 2011Incomplete lists (February 2011, July 2013)
List of hottest starsMid List1 May 2015Incomplete lists (May 2015)
List of hyperbolic cometsLow List2 January 2017CS1 errors: external links, Clarification needed (January 2017)
List of instrument-resolved minor planetsMid List2 October 2011Incomplete lists (October 2011), CS1 errors: chapter ignored
List of large optical telescopesLow List2 Citation with bare URL, Citation lacking title
List of largest exoplanetsLow List1 July 2015Incomplete lists (July 2015)
List of largest galaxiesLow List4 October 2016Incomplete lists (October 2016), References needed (January 2017), Unsourced statements (July 2017), Dead external links (July 2017)
List of largest infrared telescopesLow List1 November 2011References needed (November 2011)
List of largest nebulaeLow List2 November 2014Incomplete lists (November 2014), Original research (October 2015)
List of largest starsMid List2 January 2016Citation lacking title, Incomplete lists (January 2016)
List of least voluminous starsLow List1 January 2015Incomplete lists (January 2015)
List of minor planet discoverersUnknown List2 October 2017Citation with accessdate and no URL, Potentially dated statements (October 2017)
List of minor planetsLow List1 October 2017Potentially dated statements (October 2017)
List of missions to minor planetsLow List1 July 2015Update needed (July 2015)
List of most massive black holesMid List1 June 2017Incomplete lists (June 2017)
List of most massive exoplanetsLow List2 July 2015Incomplete lists (July 2015), References needed (December 2016)
List of most massive starsMid List1 January 2016Incomplete lists (January 2016)
List of natural satellitesMid FL1 September 2017Dead external links (September 2017)
List of nearest black holesLow List2 August 2017CS1 errors: external links, Incomplete lists (August 2017)
List of nearest galaxiesLow List2 June 2008Unsourced statements (June 2008), CS1 errors: dates
List of neutrino experimentsMid List1 December 2009Expansion needed (December 2009)
List of numbered cometsLow List1 June 2016Potentially dated statements (June 2016)
List of objects at Lagrangian pointsLow List2 November 2009Unsourced statements (November 2009), Failed verification (November 2009)
List of open clustersLow List1 December 2009Incomplete lists (December 2009)
List of orbitsLow List3 July 2012Unsourced statements (July 2012, December 2013, May 2016)
List of planet typesLow List3 April 2015Cleanup needed (April 2015, April 2015), Sources lacking (April 2016)
List of planetariumsLow List1 August 2008Incomplete lists (August 2008)
List of planetary features with Māori namesLow List1 June 2013Orphaned (June 2013)
List of polar-ring galaxiesLow List1 August 2008Incomplete lists (August 2008)
List of possible dwarf planetsMid List1 November 2015Unsourced statements (November 2015)
List of potentially habitable exoplanetsMid Start1 January 2016Unsourced statements (January 2016)
List of proper names of starsLow List2 October 2011References needed (October 2011), Unsourced statements (April 2017)
List of proposed space observatoriesMid List1 October 2017Update needed (October 2017)
List of protoplanetary nebulaeMid List1 July 2010Incomplete lists (July 2010)
List of quasarsMid List1 August 2008Incomplete lists (August 2008)
List of radio telescopesMid List1 August 2008Incomplete lists (August 2008)
List of reflected light sourcesUnknown Stub1 September 2016Orphaned (September 2016)
List of ring galaxiesLow List1 July 2013Incomplete lists (July 2013)
List of slow rotators (minor planets)Low List1 2017Potentially dated statements (2017)
List of solar stormsLow List1 August 2016Unsourced statements (August 2016)
List of solar telescopesLow List1 February 2016Expansion needed (February 2016)
List of space telescopesMid FL2 January 2015Unsourced statements (January 2015), Dead external links (September 2017)
List of spiral galaxiesLow List1 August 2008Incomplete lists (August 2008)
List of star names in LepusLow Start1 April 2014Orphaned (April 2014)
List of star names in PiscesLow Start1 April 2014Orphaned (April 2014)
List of star systems within 65–70 light-yearsMid List1 Citation with accessdate and no URL
List of star systems within 70–75 light-yearsMid List1 Citation with accessdate and no URL
List of stars in Argo NavisLow List1 September 2010Unsourced statements (September 2010)
List of stars in EridanusMid List1 January 2016Unsourced statements (January 2016)
List of stars in LibraMid List1 January 2017Disputed statements (January 2017)
List of stars in LyraMid List2 CS1 errors: external links, CS1 errors: invisible characters
List of stars in NormaMid List1 December 2016Links needing disambiguation (December 2016)
List of stars more luminous than any closer starLow List1 November 2010Sources lacking (November 2010)
List of stars with proplydsLow List1 August 2008Incomplete lists (August 2008)
List of stars with resolved imagesMid List1 June 2010Incomplete lists (June 2010)
List of stellar streamsMid List1 August 2008Incomplete lists (August 2008)
List of telescope parts and constructionMid List1 January 2012Unsourced statements (January 2012)
List of telescope typesLow List1 December 2013Sources lacking (December 2013)
List of the most distant astronomical objectsMid List1 2012Potentially dated statements (2012)
List of the star names in DracoLow Start1 May 2012Orphaned (May 2012)
List of things named after Christiaan HuygensLow List2 May 2017Sources lacking (May 2017), Notability unclear (May 2017)
List of transiting exoplanetsLow List1 April 2013Obsolete information (April 2013)
List of voidsLow List1 February 2011Incomplete lists (February 2011)
List of white dwarfsLow List1 2013Potentially dated statements (2013)
Lists of solar power stationsLow List1 January 2015Orphaned (January 2015)
Littrow (crater)Low Start1 January 2016In-text citations lacking (January 2016)
Local GroupTop C1 April 2015Unsourced statements (April 2015)
Local VoidMid Start1 August 2016Incomplete lists (August 2016)
Locality (astronomy)Low Stub2 February 2012Sources lacking (February 2012), Style editing needed (February 2012)
Lockman HoleMid Start3 September 2011Expert attention needed (September 2011), Too technical (September 2011)
Loge (moon)Low Stub1 May 2017Dead external links (May 2017)
Lohrmann (crater)Low Start1 July 2016Categories needed (July 2016)
Lone SignalUnknown Start1 November 2014Unsourced statements (November 2014)
Longitude of the ascending nodeMid Start1 July 2009Clarification needed (July 2009)
Low-dimensional chaos in stellar pulsationsMid Start5 September 2010Expert attention needed (September 2010), Original research (September 2010), Style editing needed (September 2010), Conflict of interest (September 2010)
Low-surface-brightness galaxyMid Stub2 July 2007Unsourced statements (July 2007), Citation with accessdate and no URL
Lowell Observatory Near-Earth-Object SearchMid Start2 October 2009References needed (October 2009), Unsourced statements (April 2012)
Ludwig BiermannMid Stub1 January 2010In-text citations lacking (January 2010)
Ludwig StruveUnknown Start1 April 2015References needed (April 2015)
LuminosityTop Start1 July 2017References needed (July 2017)
Luminosity distanceMid Start1 February 2014Unsourced statements (February 2014)
Luminous infrared galaxyMid Start1 May 2015Expansion needed (May 2015)
Lunar Expeditionary ComplexLow Stub1 October 2015References needed (October 2015)
Lunar Explorers SocietyLow C1 April 2011In-text citations lacking (April 2011)
Lunar and Planetary LaboratoryMid Start1 March 2015References needed (March 2015)
Lunar phaseMid C3 July 2012References needed (July 2012), External link cleanup (April 2015), Spam cleanup (April 2015)
Lunar theoryMid C1 May 2012References needed (May 2012)
Luyten 726-8Mid C1 January 2012Vague or ambiguous time (January 2012)
Lyman-alpha blobMid Start1 Citation lacking title
Lynds 1616Low Stub1 December 2007Sources lacking (December 2007)
M. Shahid QureshiUnknown Start1 May 2017Dead external links (May 2017)
M1-92Low Start1 December 2007References needed (December 2007)
M2-9Mid Start1 February 2007Unsourced statements (February 2007)
M42 HH-2Low Stub2 March 2015Notability unclear (March 2015), Orphaned (March 2015)
M59-UCD3Low Stub1 2015Potentially dated statements (2015)
M82 X-1Low Stub1 December 2009Sources lacking (December 2009)
M85-HCC1Low Stub1 2015Potentially dated statements (2015)
MACHO 176.18833.411Low Start2 2015Potentially dated statements (2015), Orphaned (August 2016)
MACS J0416.1-2403Low Stub1 February 2016Unsourced statements (February 2016)
MACS J0647+7015Unknown Stub1 May 2017Dead external links (May 2017)
MACS1149-JDUnknown Stub1 January 2015Orphaned (January 2015)
MAssive Cluster SurveyUnknown Stub1 December 2012References needed (December 2012)
MCELS (Magellanic Cloud Emission-line Survey)Low Stub1 February 2009Orphaned (February 2009)
MERLINMid C1 June 2007Unsourced statements (June 2007)
MGC1Low Stub1 July 2015In-text citations lacking (July 2015)
MIMOS IILow Stub1 May 2017Dead external links (May 2017)
MIT Lincoln LaboratoryMid C1 May 2014Reliable references lacking (May 2014)
MOA-2008-BLG-310LLow Stub1 February 2016References needed (February 2016)
MOXELow Stub1 February 2009Orphaned (February 2009)
MRC 1138-262Low Stub3 February 2009Orphaned (February 2009), Expansion needed (March 2014), Vague or ambiguous time (October 2014)
MS 1512-cB58Low Stub1 May 2017Dead external links (May 2017)
MUL.APINLow Start1 August 2012Reference cleanup (August 2012)
MWC 349Low Stub1 March 2016References needed (March 2016)
Ma YizeUnknown Start1 November 2007References needed (November 2007)
Mad About PhysicsLow Start1 September 2013Promotional tone (September 2013)
Magellan Planet Search ProgramMid Start1 December 2013Incomplete lists (December 2013)
Magellanic CloudsMid Start1 Citation with accessdate and no URL
Magellanic StreamMid Start2 February 2017References needed (February 2017, July 2017)
Magellanic spiralLow Start1 April 2010Expansion needed (April 2010)
MagnetarMid C3 September 2008Potentially dated statements (September 2008, 2010, March 2016)
Magnetic brakingMid Start2 April 2013References needed (April 2013), Original research (April 2013)
Magnetic midnightLow Stub2 June 2012Context needed (June 2012), Introduction cleanup (June 2012)
Magnetic reconnectionMid Start2 January 2012Unsourced statements (January 2012), Introduction cleanup (March 2015)
MagnetosheathLow Start1 July 2007Unsourced statements (July 2007)
Magnetospheric eternally collapsing objectLow Start1 June 2017Unsourced statements (June 2017)
MakemakeHigh FA1 December 2015Potentially dated statements (December 2015)
Malcolm FridlundMid Stub1 July 2010BLP articles lacking sources (July 2010)
Malin 1Low Stub1 February 2015Potentially dated statements (February 2015)
Malmquist biasLow C1 April 2011Unsourced statements (April 2011)
Managua eventLow Start2 September 2014Update needed (May 2015), Reliable references lacking (September 2014)
Manasse MbonyeLow Stub1 January 2015Orphaned (January 2015)
Manchester Astronomical SocietyLow Stub1 November 2014References needed (November 2014)
March equinoxHigh Start4 July 2011Detailed references needed, Failed verification (July 2011), Accuracy disputes (March 2017), Unsourced statements (March 2017)
Marco DragoLow Stub2 February 2016Notability unclear (February 2016), Orphaned (January 2017)
Marco Polo (spacecraft)Low Start2 August 2012References needed (August 2012), Unsourced statements (March 2015)
Marguerite LaugierLow Stub1 June 2013Unsourced statements (June 2013)
Maria CunitzLow C1 August 2013Vague or ambiguous time (August 2013)
Maria MitchellMid C1 Citation with accessdate and no URL
Marie Henri AndoyerUnknown Start1 June 2017Dead external links (June 2017)
Mariner's astrolabeBottom Start1 August 2013Weasel-worded phrases (August 2013)
Mario HamuyLow Stub1 June 2017Dead external links (June 2017)
Mark Armstrong (astronomer)Low Stub1 October 2012Dead external links (October 2012)
Mark R. ShowalterMid C1 September 2016Dead external links (September 2016)
Mark TruebloodMid Start1 March 2011BLP articles lacking sources (March 2011)
Marklund convectionLow Start1 January 2015Orphaned (January 2015)
MarsTop FA1 2016Potentially dated statements (2016)
Mars in cultureUnknown C1 January 2010Unsourced statements (January 2010)
Mars raceLow Start1 April 2017Merge needed (April 2017)
Mars regional atmospheric modeling systemLow Stub2 November 2008Expert attention needed (November 2008)
MartianLow C1 February 2016Unsourced statements (February 2016)
Martian canalLow C2 December 2007References needed (December 2007), Failed verification (March 2017)
Martin BarstowMid Stub1 April 2015Expansion needed (April 2015)
Martin ReesUnknown Start3 August 2014Unsourced statements (August 2014, March 2016), In-text citations lacking (August 2014)
Martin RyleHigh Start1 November 2015Unsourced statements (November 2015)
Mary AlmondLow Start1 February 2017BLP articles lacking sources (February 2017)
Mary Lea HegerLow Start1 February 2016References needed (February 2016)
Mason (crater)Low Start1 September 2007In-text citations lacking (September 2007)
Mass catcherLow Stub1 December 2010References needed (December 2010)
Mass segregation (astronomy)Mid Start1 June 2017Clarification needed (June 2017)
Massive compact halo objectMid C2 September 2011Unsourced statements (September 2011, December 2012)
Mathematics of general relativityHigh C2 June 2008Expansion needed (June 2008, August 2011)
Matter power spectrumLow Stub1 August 2017Sources lacking (August 2017)
Mauna Kea ObservatoriesHigh Start1 2012Potentially dated statements (2012)
Maunder MinimumLow C2 July 2015Unsourced statements (July 2015), Original research (July 2015)
Maura McLaughlinLow Stub1 August 2017Failed verification (August 2017)
Maurice LoewyLow Start2 December 2010Unsourced statements (December 2010), In-text citations lacking (June 2013)
Maya astronomyUnknown Stub1 October 2017Unsourced statements (October 2017)
Mayall IILow Start1 March 2017References needed (March 2017)
Maynard PittendreighLow Start1 June 2016BLP articles lacking sources (June 2016)
McDonald ObservatoryMid B1 January 2012Unsourced statements (January 2012)
McMillin ObservatoryLow Stub2 March 2009Notability unclear (March 2009), In-text citations lacking (March 2009)
Meanings of minor planet namesLow List1 August 2016Unsourced statements (August 2016)
Meanings of minor planet names: 10001–11000Low List2 August 2011Unsourced statements (August 2011), Dead external links (June 2017)
Meanings of minor planet names: 12001–13000Low List1 June 2017Dead external links (June 2017)
Meanings of minor planet names: 386001–387000Low List1 June 2016Incomplete lists (June 2016)
Meanings of minor planet names: 400001–401000Low List1 February 2016Incomplete lists (February 2016)
Meanings of minor planet names: 5001–6000Low List3 June 2016Citation with bare URL, Citation lacking title, Dead external links (June 2016)
Medium Earth orbitLow Stub1 July 2012Unsourced statements (July 2012)
Medusa NebulaLow Stub1 December 2007Unsourced statements (December 2007)
Mee (crater)Low Start1 September 2010Dead external links (September 2010)
MeerKATMid C1 CS1 errors: dates
Meitner (lunar crater)Low Start1 July 2013In-text citations lacking (July 2013)
Mensa (constellation)Mid Start1 October 2013Unsourced statements (October 2013)
Mercury's magnetic fieldMid B2 August 2017CS1 errors: chapter ignored, Update needed (August 2017)
Mervyn A. EllisonMid Start1 June 2017Dead external links (June 2017)
MesosphereLow Start2 October 2016Unsourced statements (October 2016, May 2017)
Messier (crater)Low Start1 October 2017Unsourced statements (October 2017)
Messier 23Low Stub1 February 2007Unsourced statements (February 2007)
Messier 29Low Stub1 February 2007Unsourced statements (February 2007)
Messier 3Mid C1 September 2013Unsourced statements (September 2013)
Messier 34Mid Start2 February 2007Unsourced statements (February 2007, September 2009)
Messier 48Low Stub1 February 2007Unsourced statements (February 2007)
Messier 5Mid Start1 April 2016Unsourced statements (April 2016)
Messier 58Mid Start1 February 2010Unsourced statements (February 2010)
Messier 61Low Stub2 March 2017Accuracy disputes (March 2017), References needed (March 2017)
Messier 69Low Stub1 February 2007Unsourced statements (February 2007)
Messier 71Mid Start1 July 2017Unsourced statements (July 2017)
Messier 72Mid Start1 CS1 errors: chapter ignored
Messier 73Mid C1 February 2007Unsourced statements (February 2007)
Messier 75Low Stub1 February 2007Unsourced statements (February 2007)
Messier 78Low Stub1 Web citation with no URL
Messier 79Mid Start1 February 2007Unsourced statements (February 2007)
Messier 83Mid Start1 October 2017Unsourced statements (October 2017)
Messier 85Mid Start1 February 2007Unsourced statements (February 2007)
Messier 87Top GA2 June 2015Unsourced statements (June 2015), DOIs inactive (2017)
Messier 89Mid Start1 February 2007Unsourced statements (February 2007)
Messier 90Low Start1 February 2007Unsourced statements (February 2007)
Messier 93Low Stub1 February 2007Unsourced statements (February 2007)
Messier marathonBottom Start1 February 2013In-text citations lacking (February 2013)
MetallicityTop B3 November 2012Unsourced statements (November 2012, July 2016), Dead external links (June 2017)
Meteor showerMid C1 August 2017Incomplete lists (August 2017)
Meteoritics & Planetary ScienceLow Start1 Citation with accessdate and no URL
Methods of detecting exoplanetsHigh B4 April 2014Potentially dated statements (April 2014), Unsourced statements (July 2015), Clarification needed (July 2015), Dead external links (June 2017)
Metis (moon)Low GA1 August 2016Unsourced statements (August 2016)
Metric expansion of spaceHigh C4 August 2015Unsourced statements (March 2016, August 2015), Style editing needed (August 2015), Weasel-worded phrases (March 2016)
Michael Rowan-RobinsonMid Start3 July 2017Unsourced statements (July 2017), Dead external links (July 2017), Vague or ambiguous time (July 2017)
Michael William FeastMid Start2 March 2013Unsourced statements (September 2013, March 2013)
Michel MayorLow C2 March 2017Unsourced statements (March 2017), References needed (March 2017)
Michele DoughertyUnknown Stub2 January 2017Vague or ambiguous time (January 2017), Unsourced statements (January 2017)
Microgravity CentreLow Start1 Coordinates needed
Microlensing Observations in AstrophysicsMid Start1 July 2011Sources lacking (July 2011)
MicroturbulenceLow Stub1 June 2008Expansion needed (June 2008)
Mid Atlantic Star PartyLow Stub1 June 2016Dead external links (June 2016)
Midnight sunUnknown Start1 August 2013References needed (August 2013)
Miguel HurtadoUnknown Start1 October 2016Orphaned (October 2016)
Mikhail LyapunovMid Stub1 September 2008References needed (September 2008)
Milankovič (lunar crater)Low Start1 December 2012In-text citations lacking (December 2012)
Milky WayTop GA1 February 2012Reliable references lacking (February 2012)
Milky Way (mythology)Low C2 February 2007References needed (July 2009), Unsourced statements (February 2007)
MilkyWay@homeLow Start7 January 2010Unsourced statements (August 2010, September 2011), Potentially dated statements (January 2010, November 2011), Weasel-worded phrases (April 2013), Vague or ambiguous time (April 2013), Dead external links (September 2017)
Millstone HillLow Start1 December 2013In-text citations lacking (December 2013)
Milton L. HumasonMid Start1 October 2008Unsourced statements (October 2008)
Mimas (moon)Mid C3 November 2011Unsourced statements (November 2011, March 2016), Clarification needed (November 2012)
Mineralogy of MarsLow Start1 September 2016Orphaned (September 2016)
Mini-NeptuneLow Start1 January 2016Unsourced statements (January 2016)
Miniature Exoplanet Radial Velocity ArrayLow Stub1 CS1 errors: dates
Minor Planet CenterMid Start1 February 2015Potentially dated statements (February 2015)
Minor planetTop C2 July 2013Unsourced statements (July 2013), Potentially dated statements (October 2017)
Minor-planet moonLow B1 June 2013Unsourced statements (June 2013)
Minoru HondaLow Stub1 January 2009References needed (January 2009)
Minute and second of arcHigh Start2 May 2016Unsourced statements (May 2016, March 2017)
MiraHigh C1 October 2017Unsourced statements (October 2017)
Mira variableHigh Start1 July 2016Unsourced statements (July 2016)
Mirage of astronomical objectsUnknown C1 January 2017Unsourced statements (January 2017)
Mizar and AlcorMid Start1 May 2015Unsourced statements (May 2015)
Model photosphereMid C1 October 2009In-text citations lacking (October 2009)
Model spectrumLow Stub1 December 2009Sources lacking (December 2009)
Mohorovičić (crater)Low Start1 November 2007Sources lacking (November 2007)
Molecules in starsUnknown Stub1 October 2013References needed (October 2013)
Molėtai Astronomical ObservatoryLow Start2 August 2013References needed (August 2013), Reliable references lacking (August 2013)
Momentum compactionUnknown Stub1 July 2014Orphaned (July 2014)
MonocerosMid Start2 December 2008Expert attention needed (December 2008)
Monthly Notices of the Royal Astronomical SocietyMid Start2 July 2012Potentially dated statements (July 2012), Incomplete lists (July 2012)
Montreal PlanetariumUnknown Start1 CS1 errors: dates
Moon ExpressLow Start2 July 2013Potentially dated statements (July 2013), Update needed (March 2017)
Moon landing conspiracy theories in popular cultureLow Start1 June 2013Unsourced statements (June 2013)
MoonLITELow Start2 May 2015Update needed (May 2015), Obsolete information (May 2015)
Moons of HaumeaLow GA1 April 2017Update needed (April 2017)
Moons of MarsLow C1 April 2016Unsourced statements (April 2016)
Moons of NeptuneMid FL1 September 2017Dead external links (September 2017)
Moons of PlutoLow C1 June 2015Unsourced statements (June 2015)
Mopra TelescopeLow Start1 September 2014References needed (September 2014)
Morehead Planetarium and Science CenterLow Start2 Web citation with no URL, Citation with accessdate and no URL
Morgoth MaculaUnknown Stub1 July 2015Sources lacking (July 2015)
Mother CamelsLow Start1 November 2011References needed (November 2011)
Mount Abu InfraRed ObservatoryLow Stub1 September 2017Unsourced statements (September 2017)
Mount Graham International ObservatoryLow Start1 August 2012References needed (August 2012)
Mount John University ObservatoryLow Start1 July 2016Dead external links (July 2016)
Moving the EarthUnknown Stub2 March 2017Weasel-worded phrases (March 2017), References needed (March 2017)
Mu AraeMid GA1 January 2016Original research (January 2016)
Mu Arae bLow Stub1 January 2016Original research (January 2016)
Mu BoötisLow Start1 May 2010In-text citations lacking (May 2010)
Mu CassiopeiaeLow Start1 October 2011Unsourced statements (October 2011)
Mu CepheiMid C2 January 2017References needed (January 2017), Unsourced statements (October 2017)
Mu ColumbaeLow Start1 December 2016Clarification needed (December 2016)
Mu DraconisLow Start1 May 2017Unsourced statements (May 2017)
Mu HerculisMid Start2 May 2017Unsourced statements (May 2017), References needed (May 2017)
Mu LyraeLow Stub1 April 2017Unsourced statements (April 2017)
Mu Piscis AustriniLow Start1 May 2017Reliable references lacking (May 2017)
Mu SagittariiLow Start1 September 2017References needed (September 2017)
Muhammad ibn Musa al-KhwarizmiLow B6 January 2011Unsourced statements (September 2013, November 2014, April 2016, August 2015, April 2017), Disputed statements (January 2011)
Mulla Mahmud JaunpuriMid Stub1 November 2009Sources lacking (November 2009)
Multi Unit Spectroscopic ExplorerLow Stub1 February 2015Unsourced statements (February 2015)
Multispectral imageMid Start2 February 2015References needed (February 2015), In-text citations lacking (February 2015)
MultiverseLow C1 October 2017Unsourced statements (October 2017)
Multiverse (religion)Mid Start6 May 2012Detailed references needed, Unsourced statements (December 2012), Reliable references lacking (May 2012), Original research (May 2012, December 2012), Merge needed (September 2016)
Musca BorealisLow Start1 CS1 errors: external links
Muʾayyad al-Dīn al-ʿUrḍīUnknown Stub1 March 2017Unsourced statements (March 2017)
MySkyBottom Stub1 September 2009Sources lacking (September 2009)
Mz 1Low Start1 Citation with accessdate and no URL
N 180BLow Stub1 February 2009Orphaned (February 2009)
N CarinaeLow Stub1 December 2009Sources lacking (December 2009)
N bandLow Stub1 November 2009Sources lacking (November 2009)
N44 (emission nebula)Low Start1 November 2016References needed (November 2016)
NASA Earth ObservatoryLow Stub1 2006Potentially dated statements (2006)
NASA Infrared Telescope FacilityLow Start2 October 2015References needed (October 2015), Original research (October 2015)
NASA Star and Exoplanet DatabaseLow Start1 April 2015Dead external links (April 2015)
NASA researchUnknown Start2 June 2016Expansion needed (June 2016), Introduction cleanup (June 2016)
NEODySLow Stub2 September 2017In-text citations lacking (September 2017), Unsourced statements (September 2017)
NGC 1Low Start1 March 2015Unsourced statements (March 2015)
NGC 1003Low Stub1 December 2016References needed (December 2016)
NGC 103Low Stub1 May 2016Wikilinks needed (May 2016)
NGC 1049Low Stub1 February 2007Unsourced statements (February 2007)
NGC 110Low Stub1 June 2017Unsourced statements (June 2017)
NGC 1140Low Start1 Citation with accessdate and no URL
NGC 126Unknown Stub1 February 2016References needed (February 2016)
NGC 127Unknown Stub1 February 2016References needed (February 2016)
NGC 1291Low Stub1 February 2015Dead external links (February 2015)
NGC 135Unknown Stub1 February 2016References needed (February 2016)
NGC 1360Low Stub1 CS1 errors: external links
NGC 139Low Stub1 May 2017Expansion needed (May 2017)
NGC 1407Low Stub1 Citation with accessdate and no URL
NGC 1427Low Stub1 February 2007Unsourced statements (February 2007)
NGC 146Low Stub1 August 2016In-text citations lacking (August 2016)
NGC 148Low Stub1 August 2016References needed (August 2016)
NGC 1491Low Stub1 February 2017References needed (February 2017)
NGC 1559Low Stub1 CS1 errors: external links
NGC 1569Low Start1 CS1 errors: chapter ignored
NGC 163Low Stub2 May 2017Unsourced statements (May 2017), References needed (May 2017)
NGC 1723Low Stub2 March 2012References needed (March 2012), Introduction cleanup (March 2012)
NGC 1728Low Stub2 March 2012References needed (March 2012), Update needed (March 2012)
NGC 18Low Stub1 September 2017Unsourced statements (September 2017)
NGC 187Unknown Stub1 May 2017Clarification needed (May 2017)
NGC 1964Low Stub1 Citation with accessdate and no URL
NGC 2023Mid Stub2 December 2007References needed (December 2007), Unsourced statements (August 2016)
NGC 2174Low Stub2 February 2007Unsourced statements (February 2007), Dead external links (July 2010)
NGC 2440Mid Stub1 CS1 errors: external links
NGC 2441Low Stub1 CS1 errors: external links
NGC 262Low Stub1 June 2016Unsourced statements (June 2016)
NGC 2736Low Stub1 September 2014Unsourced statements (September 2014)
NGC 2768Low Start1 Citation with accessdate and no URL
NGC 2915Low Stub1 April 2007Unsourced statements (April 2007)
NGC 3184Mid Start1 September 2017Clarification needed (September 2017)
NGC 3191Low Stub1 Citation with accessdate and no URL
NGC 3227Mid Start1 February 2007Unsourced statements (February 2007)
NGC 3259Low Stub1 Reference errors
NGC 3370Low Stub2 February 2007Unsourced statements (February 2007, October 2011)
NGC 3384Mid Stub1 June 2016Weasel-worded phrases (June 2016)
NGC 3521Mid Stub1 Reference errors
NGC 3532Mid Start1 Citation with accessdate and no URL
NGC 3593Mid Stub2 June 2013Unsourced statements (June 2013), Reference errors
NGC 3628Mid Stub1 February 2007Unsourced statements (February 2007)
NGC 3642Low Start1 Citation with accessdate and no URL
NGC 3675Low Start1 Citation with accessdate and no URL
NGC 381Low Stub2 February 2007Unsourced statements (February 2007), Clarification needed (June 2016)
NGC 382Low Stub1 December 2016References needed (December 2016)
NGC 402Low Stub2 Web citation with no URL, Citation with accessdate and no URL
NGC 4026Low Start1 Citation with accessdate and no URL
NGC 4111Low Start1 Citation with accessdate and no URL
NGC 4274Low Start1 Citation with accessdate and no URL
NGC 4323Low Stub1 Web citation with no URL
NGC 4349-127Low Start1 January 2017References needed (January 2017)
NGC 4414Mid Stub1 Web citation with no URL
NGC 4420Low Stub1 February 2017References needed (February 2017)
NGC 4494Low Start1 Citation with accessdate and no URL
NGC 4526Mid Stub1 Citation with accessdate and no URL
NGC 4565Mid Start1 December 2015Weasel words (December 2015)
NGC 4881Mid Stub1 February 2007Unsourced statements (February 2007)
NGC 4889Low Start1 February 2017References needed (February 2017)
NGC 5026Low Stub1 May 2017References needed (May 2017)
NGC 5034Low Stub1 May 2016Wikilinks needed (May 2016)
NGC 5090 and NGC 5091Low Stub1 February 2007Unsourced statements (February 2007)
NGC 5177Low Stub1 CS1 errors: external links
NGC 5195Mid Start1 February 2007Unsourced statements (February 2007)
NGC 5204Low C1 March 2015Clarification needed (March 2015)
NGC 5343Low Stub1 May 2016References needed (May 2016)
NGC 5490Low Stub1 December 2016Links needing disambiguation (December 2016)
NGC 5962Low Stub1 October 2012Dead external links (October 2012)
NGC 6120Low Stub1 July 2016In-text citations lacking (July 2016)
NGC 6452Low Stub1 May 2016Expansion needed (May 2016)
NGC 6496Mid Start2 April 2012Weasel-worded phrases (April 2012), Clarification needed (April 2012)
NGC 6544Low Start1 December 2016References needed (December 2016)
NGC 6744Mid Stub1 February 2007Unsourced statements (February 2007)
NGC 68 groupUnknown Stub1 CS1 errors: external links
NGC 6820 and NGC 6823Low Start2 Citation with bare URL, Citation lacking title
NGC 6861Low Stub1 CS1 errors: external links
NGC 6939Low Start1 Citation with accessdate and no URL
NGC 6940Low Start1 Citation with accessdate and no URL
NGC 7028Low Stub1 May 2017Disputed statements (May 2017)
NGC 7049Low Stub2 July 2016Unsourced statements (July 2016), Disputed statements (July 2016)
NGC 7060Low Stub1 URL error
NGC 7129Mid Stub2 October 2011References needed (December 2012), Unsourced statements (October 2011)
NGC 7142Unknown Start1 February 2017Cleanup needed (February 2017)
NGC 72Unknown Stub1 CS1 errors: external links
NGC 7257Mid Stub2 September 2014Cleanup needed (September 2014, September 2014)
NGC 7318Mid Stub1 February 2007Unsourced statements (February 2007)
NGC 772Low Stub1 February 2007Unsourced statements (February 2007)
NGC 7727Unknown Stub1 CS1 errors: missing author or editor
NGC 7790Unknown Stub1 CS1 errors: external links
NGC 869Low Start1 February 2007Unsourced statements (February 2007)
NGC 87Low Stub1 February 2017References needed (February 2017)
NGC 91Unknown Stub1 Citation with accessdate and no URL
NGC 95Unknown Stub1 February 2017References needed (February 2017)
NGC 953Low Stub1 CS1 errors: external links
NIXTLow Stub1 February 2016Sources lacking (February 2016)
NML CygniLow Start1 October 2017Unsourced statements (October 2017)
NR Canis MajorisLow Stub1 February 2017References needed (February 2017)
NRAO VLA Sky SurveyLow Stub2 November 2015References needed (November 2015), Unsourced statements (January 2017)
NSV 1436Low Start1 January 2017References needed (January 2017)
NVSS 2146+82Mid Stub1 September 2011Orphaned (September 2011)
Naiad (moon)Low Start1 February 2007Unsourced statements (February 2007)
Naked singularityLow Start1 April 2007Unsourced statements (April 2007)
NakshatraLow B9 July 2008References needed (July 2008), Expert attention needed (July 2009), Unsourced statements (October 2011), Citation with bare URL, Citation lacking title, Web citation with no URL, Original research (October 2017), Reliable references lacking (October 2017)
Name conflicts with minor planetsLow List1 December 2009Sources lacking (December 2009)
Nancy HoukUnknown Start5 September 2017Reliable references lacking (September 2017), In-text citations lacking (September 2017), Notability unclear (September 2017), Introduction cleanup (September 2017), Reference cleanup (September 2017)
Naoshi FukushimaUnknown Stub1 January 2009Sources lacking (January 2009)
Naoto SatōLow Start1 July 2016Unsourced statements (July 2016)
Nasir al-Din al-TusiUnknown C1 April 2014Weasel-worded phrases (April 2014)
Natal ObservatoryLow B1 December 2009In-text citations lacking (December 2009)
Nathaniel BlissLow Stub1 December 2016Introduction cleanup (December 2016)
National Australian Convention of Amateur AstronomersLow Start1 July 2016Notability unclear (July 2016)
National Observatory (Brazil)Mid Start1 June 2013References needed (June 2013)
National Observatory of AthensMid Start1 July 2016References needed (July 2016)
National Virtual ObservatoryLow Start1 March 2010References needed (March 2010)
Natural satelliteTop C5 January 2012Unsourced statements (January 2012, November 2016, January 2017), References needed (December 2013), Potentially dated statements (October 2016)
Naumann (crater)Low Start1 March 2016In-text citations lacking (March 2016)
Near-Earth objectMid C3 December 2016Citation with accessdate and no URL, Potentially dated statements (December 2016, October 2017)
Near-Earth supernovaLow B1 May 2016Original research (May 2016)
Near-equatorial orbitLow Stub2 May 2009Sources lacking (May 2009), Unsourced statements (May 2009)
Nebra sky diskLow C2 November 2013Unsourced statements (November 2013), Original research (November 2013)
NebulaTop B1 June 2017Failed verification (June 2017)
Nebulae in fictionLow Start3 February 2013Introduction cleanup (February 2013), Style editing needed (February 2013), Fact and fiction differentiation (February 2013)
Neil Armstrong ObservatoryUnknown Stub1 May 2015References needed (May 2015)
Neil deGrasse TysonHigh C3 November 2014Unsourced statements (November 2014, July 2017), Citation with format and no URL
Neith (hypothetical moon)Low Start2 September 2011Expansion needed (September 2011), Web citation with no URL
Nemesis (hypothetical star)Mid C2 2012Potentially dated statements (2012), Unsourced statements (August 2017)
Neon-burning processMid Stub1 March 2014References needed (March 2014)
NeptuneTop FA2 March 2010Clarification needed (March 2010), Dead external links (June 2017)
Neuschwanstein (meteorite)Low B1 Web citation with no URL
NeutrinoHigh B3 December 2016Citation with accessdate and no URL, Cleanup needed (December 2016, December 2016)
Neutrino Array Radio CalibrationLow Stub1 April 2009References needed (April 2009)
Neutron starTop C2 September 2016CS1 errors: chapter ignored, Reliable references lacking (September 2016)
Neutron star spin-upLow Stub1 September 2014References needed (September 2014)
Neutron-star oscillationMid B1 May 2008Unsourced statements (May 2008)
NeutroniumBottom Start5 February 2013Reliable references lacking (February 2013), Original research (February 2013), Clarification needed (April 2013), Unsourced statements (February 2017, June 2017)
Newcomb (lunar crater)Low Start1 July 2016Unsourced statements (July 2016)
Newton (lunar crater)Low Start1 February 2016In-text citations lacking (February 2016)
Newton's laws of motionHigh C1 August 2012Unsourced statements (August 2012)
Nial TanvirMid Stub2 September 2008Reliable references lacking (September 2008), BLP articles lacking sources (September 2008)
Nicholas B. SuntzeffLow Start1 URL error
Nicholas MayallMid GA1 October 2014Unsourced statements (October 2014)
Nicolaus CopernicusHigh B4 June 2013Unsourced statements (June 2013), Page number citations needed (June 2013), Disputed statements (October 2016), Reliable references lacking (April 2017)
Nicolaus OlahusUnknown Stub1 July 2015References needed (July 2015)
NightMid Start2 July 2007Unsourced statements (July 2007), References needed (July 2015)
Night Sky NetworkLow Stub1 October 2015Sources lacking (October 2015)
Night skyHigh Start1 December 2009References needed (December 2009)
Nikolai Aleksandrovich KozyrevMid Start5 June 2008Expansion needed (June 2008, February 2009), References needed (June 2010), Unsourced statements (May 2013, December 2015)
Nikolay MoiseyevLow Start1 February 2011Sources lacking (February 2011)
Nine ViewsBottom Start1 Coordinates needed
Nitrogen monohydrideMid C1 February 2016Clarification needed (February 2016)
Nix (moon)Mid Start1 July 2015Expansion needed (July 2015)
Noah BroschLow Start1 October 2013Autobiographical articles (October 2013)
Nodal periodUnknown Stub1 February 2013Wikilinks needed (February 2013)
Norma ArmMid Stub1 December 2009References needed (December 2009)
North polar sequenceLow Stub1 November 2009Sources lacking (November 2009)
Northern Celestial HemisphereUnknown Stub1 August 2014Sources lacking (August 2014)
Northern Virginia Astronomy ClubLow Start2 December 2016Notability unclear (December 2016), Sources lacking (December 2016)
NovaTop C1 March 2010Expansion needed (March 2010)
Nu CaeliLow Start1 September 2017Accuracy disputes (September 2017)
Nu HerculisLow Stub1 Citation with accessdate and no URL
Nu ScorpiiLow Start1 February 2017Unsourced statements (February 2017)
NullerMid Start1 August 2016Unsourced statements (August 2016)
NutationMid C2 August 2012Unsourced statements (August 2012), Clarification needed (December 2013)
OB starMid Stub2 June 2016References needed (June 2016), Disputed statements (June 2016)
OGLE-2006-BLG-109LcLow Stub1 CS1 errors: missing author or editor
OGLE-2014-BLG-0124LbUnknown Start1 October 2015References needed (October 2015)
OVV quasarMid Stub1 May 2009Unsourced statements (May 2009)
Oak Ridge ObservatoryLow Start1 September 2010Unsourced statements (September 2010)
Observable universeTop B8 July 2014Unsourced statements (September 2015, December 2014, September 2017), Potentially dated statements (2015), Clarification needed (July 2014), External link cleanup (June 2015), Spam cleanup (June 2015), CS1 errors: external links
Observation arcLow Stub1 December 2013Sources lacking (December 2013)
Observational astronomyHigh Start2 June 2009References needed (June 2009), Unsourced statements (July 2009)
Observational cosmologyHigh C1 2011Potentially dated statements (2011)
Observational history of cometsMid B2 July 2014Citation with accessdate and no URL, Potentially dated statements (July 2014)
Observations and explorations of VenusMid C1 July 2015Vague or ambiguous time (July 2015)
ObservatoryTop C1 May 2014Dead external links (May 2014)
Observatory VsetínUnknown Stub2 July 2010Expansion needed (July 2010), Sources lacking (June 2015)
OccultationMid C2 May 2015External link cleanup (May 2015), Spam cleanup (May 2015)
Oddi HelgasonLow Start1 November 2010Orphaned (November 2010)
OenopidesLow Start1 July 2014In-text citations lacking (July 2014)
Ohio State University Radio ObservatoryMid Start1 June 2017Unsourced statements (June 2017)
Okayama Planet Search ProgramLow Stub1 CS1 errors: external links
Olbers' paradoxMid C2 August 2016Unsourced statements (August 2016), Dead external links (August 2017)
Ole RømerMid B1 October 2015Reliable references lacking (October 2015)
Omar KhayyamUnknown C6 September 2017Year an event occurred needed (September 2017), Unsourced statements (September 2017), Page number citations needed (September 2017), Weasel-worded phrases (October 2017), Clarification needed (October 2017), Reliable references lacking (October 2017)
Omega NebulaMid Start1 December 2015Unsourced statements (December 2015)
Omega1 ScorpiiLow Start1 May 2017Unsourced statements (May 2017)
Omega2 ScorpiiLow Start1 May 2017Unsourced statements (May 2017)
Omicron Coronae BorealisLow Stub1 October 2017Unsourced statements (October 2017)
Omicron SagittariiLow Stub1 February 2007Unsourced statements (February 2007)
Omicron1 Canis MajorisLow Start1 2017DOIs inactive (2017)
On the Sizes and Distances (Aristarchus)Low C2 November 2008Reliable references lacking (November 2008), Unsourced statements (February 2016)
Onizuka Center for International AstronomyLow Start1 2010Potentially dated statements (2010)
OpTIIXLow Stub1 January 2013Unsourced statements (January 2013)
Open clusterTop B2 September 2009Unsourced statements (September 2009, October 2011)
Open cluster remnantLow Start1 May 2014In-text citations lacking (May 2014)
OpenUniverseLow Start2 October 2011Reliable references lacking (October 2011), Notability unclear (October 2011)
Operation MoonwatchLow Start1 February 2016Copied and pasted articles and sections (February 2016)
Oph 162225-240515Low Start1 March 2017Unsourced statements (March 2017)
Oph-IRS 48Low Stub1 March 2016Orphaned (March 2016)
OphiuchusTop B2 September 2016References needed (September 2016), Unsourced statements (September 2016)
Opposition surgeLow Start1 Citation with accessdate and no URL
Optical mountLow Stub1 December 2009Sources lacking (December 2009)
Optical pulsarLow Stub1 August 2008References needed (August 2008)
Optical telescopeHigh C1 August 2014Unsourced statements (August 2014)
Orange County AstronomersLow Stub5 February 2012Reliable references lacking (February 2012), References needed (February 2012), Introduction cleanup (February 2012), Style editing needed (February 2012), Conflict of interest (February 2012)
OrbitTop C2 October 2012Unsourced statements (October 2012, January 2016)
Orbit determinationLow Start2 August 2009References needed (August 2009), Unsourced statements (May 2012)
Orbital eccentricityHigh C2 September 2016Unsourced statements (September 2016), Vague or ambiguous time (September 2016)
Orbital inclinationHigh Start1 May 2014Unsourced statements (May 2014)
Orbital periodMid Start7 January 2011Unsourced statements (November 2011, January 2011, December 2013, March 2016, August 2016, November 2016), References needed (January 2017)
Orbital state vectorsLow Start1 September 2010Sources lacking (September 2010)
Orbiting Astronomical ObservatoryLow Start1 August 2011In-text citations lacking (August 2011)
Orbiting bodyLow Stub1 December 2009References needed (December 2009)
Orders of magnitude (length)Low List26 2002References needed (April 2007, March 2011), Potentially dated statements (2002, January 2007, August 2005, 2009, December 2008, 2010, 2012, October 2009, May 2010, 2016), Unsourced statements (December 2008, February 2009, July 2009, November 2010, September 2014, June 2011, June 2016), Vague or ambiguous time (April 2010, April 2009), Incomplete lists (November 2012), Dead external links (May 2013, February 2017), Failed verification (December 2015), Merge needed (October 2017)
Orders of magnitude (mass)Low C4 October 2011Unsourced statements (December 2011, October 2011, October 2014, March 2015)
Orion (constellation)Top B1 September 2012Unsourced statements (September 2012)
Orion (space telescope)Low Stub1 August 2011In-text citations lacking (August 2011)
Orion NebulaTop GA1 January 2012Clarification needed (January 2012)
Orion's BeltLow Start2 January 2017References needed (January 2017), Unsourced statements (September 2017)
Orontius (crater)Low Start1 February 2008In-text citations lacking (February 2008)
Oscar Montgomery LieberLow Start1 June 2013In-text citations lacking (June 2013)
Ostriker–Peebles criterionLow Stub1 September 2016References needed (September 2016)
Ott PlanetariumLow Start1 December 2014Sources lacking (December 2014)
Otto E. NeugebauerMid Start1 March 2013In-text citations lacking (March 2013)
Otto KippesLow Stub1 January 2016Notability unclear (January 2016)
Otto StruveLow C1 April 2015References needed (April 2015)
Otto Wilhelm von StruveMid Start1 April 2015References needed (April 2015)
Owens Valley Radio ObservatoryLow Stub3 July 2017CS1 errors: chapter ignored, References needed (July 2017), Trivia sections (July 2017)
Ozone Mapping and Profiler SuiteLow Stub1 February 2009Orphaned (February 2009)
Ozone Monitoring InstrumentLow Stub1 October 2012In-text citations lacking (October 2012)
P. DevadasLow Start3 June 2010BLP articles lacking sources (June 2010), Unsourced statements (January 2016), Notability unclear (January 2016)
PAGASA PlanetariumLow Stub1 August 2016Orphaned (August 2016)
PGC 10922Low Stub1 February 2015Orphaned (February 2015)
PGC 135657Low Stub1 September 2017Orphaned (September 2017)
PGC 214560Low Stub1 February 2013Orphaned (February 2013)
PGC 54493Low Stub1 September 2017Orphaned (September 2017)
PKS 0521-365Low Stub1 November 2008Sources lacking (November 2008)
PKS 2155-304Low Stub2 January 2016References needed (January 2016), CS1 errors: missing author or editor
PROMPT TelescopesLow Start2 July 2017Cleanup needed (July 2017, July 2017)
PSR B0950+08Low Stub1 March 2010Sources lacking (March 2010)
PSR B1620-26Mid Start1 October 2015Clarification needed (October 2015)
PSR J0348+0432Mid Start1 March 2017Factual verification needed (March 2017)
PSR J0357+3205Low Start1 January 2017References needed (January 2017)
PSR J0737-3039Low Start2 June 2017Dead external links (June 2017, September 2017)
PSR J1311–3430Mid Start1 August 2014Unsourced statements (August 2014)
PSR J1614–2230Mid Start1 March 2013Links needing disambiguation (March 2013)
PSR J1841-0500Low Stub1 November 2016Orphaned (November 2016)
PSR J1903+0327Low Stub1 April 2009References needed (April 2009)
PSR J1951+1123Low Stub1 November 2016References needed (November 2016)
PSR J2144-3933Low Stub2 June 2013References needed (June 2013), CS1 errors: dates
PU AurigaeLow Stub1 March 2016References needed (March 2016)
PV CepheiLow Stub1 August 2017Unsourced statements (August 2017)
Pachmarhi Telescope ArrayLow Start1 January 2011Orphaned (January 2011)
Page timeMid Stub1 December 2015Expansion needed (December 2015)
Palomar 4Low Stub1 February 2007Unsourced statements (February 2007)
Palomar Distant Solar System SurveyLow Stub2 August 2012References needed (August 2012), Clarification needed (March 2015)
Palomar ObservatoryMid B3 September 2009Unsourced statements (September 2009), Clarification needed (March 2012), Weasel-worded phrases (May 2012)
Palomar Testbed InterferometerLow Stub1 January 2012Unsourced statements (January 2012)
Palomar–Leiden surveyLow Start2 October 2015Dead external links (October 2015), Unsourced statements (January 2016)
Pan (moon)Low C1 Citation with accessdate and no URL
Pan-STARRSLow C2 April 2012Unsourced statements (April 2012, March 2014)
Panzano ObservatoryLow Stub2 August 2008Sources lacking (August 2008), Expansion needed (June 2015)
ParallaxTop C2 August 2011Unsourced statements (June 2012, August 2011)
Parenago (crater)Low Start1 September 2013In-text citations lacking (September 2013)
Paris ObservatoryHigh Start2 August 2007Unsourced statements (August 2007), Expansion needed (June 2008)
ParsecTop B1 August 2016Potentially dated statements (August 2016)
Patrice BouchetUnknown Stub1 December 2015Autobiographical articles (December 2015)
Patrick MooreLow GA1 August 2015Unsourced statements (August 2015)
Paul BoltwoodLow Stub2 January 2016BLP articles lacking sources (January 2016), Notability unclear (January 2016)
Paul D. LowmanMid Start1 February 2013References needed (February 2013)
Paul G. AbelMid Start3 December 2010Reliable references lacking (December 2010), In-text citations lacking (December 2010), BLP articles lacking sources (December 2010)
Paul John EllisLow Stub1 February 2009Orphaned (February 2009)
Paul Pellas-Graham Ryder AwardLow List3 July 2016References needed (July 2016), Citation with bare URL, Citation lacking title
Paul S. WessonMid Start1 2017DOIs inactive (2017)
Pavo-Indus SuperclusterUnknown Stub1 January 2008References needed (January 2008)
Pea galaxyMid B2 Web citation with no URL, Citation with accessdate and no URL
Peculiar galaxyHigh Start1 September 2017Copy edit needed (September 2017)
Pegasus Dwarf Irregular GalaxyLow Start1 February 2007Unsourced statements (February 2007)
Pelageya ShajnLow Stub1 Citation lacking title
Percival LowellMid B1 June 2013Unsourced statements (June 2013)
Perrine (crater)Low Start1 April 2009In-text citations lacking (April 2009)
PerseidsHigh C2 Citation with bare URL, Citation lacking title
Perth ObservatoryLow Start1 January 2016Unsourced statements (January 2016)
Peter Francis WilliamsLow Stub1 January 2016Notability unclear (January 2016)
Peter GarnavichUnknown Start1 September 2017BLP articles lacking sources (September 2017)
Peter GoldreichMid Start2 September 2010Dead external links (September 2010, May 2017)
Peter JalowiczorLow B1 August 2017Unsourced statements (August 2017)
Peter NilsonMid Stub1 December 2009Sources lacking (December 2009)
Petrus AlphonsiUnknown C1 May 2013References needed (May 2013)
Petrus ApianusLow Start1 April 2017References needed (April 2017)
Phase angle (astronomy)High Start1 December 2009Sources lacking (December 2009)
Phi Ursae MajorisLow Stub1 September 2017Reliable references lacking (September 2017)
Phil PlaitMid Start1 July 2017Unsourced statements (July 2017)
Phobos (moon)Mid B1 Detailed references needed
Phobos SurveyorLow Start1 May 2015Update needed (May 2015)
Phoenix (constellation)Mid FA1 October 2017Dead external links (October 2017)
PhotodisintegrationMid Start1 March 2011References needed (March 2011)
Photometry (astronomy)Top Start1 January 2012References needed (January 2012)
Physical cosmologyTop C2 March 2017Reference errors, References needed (March 2017)
Physics of the ImpossibleBottom Start3 February 2011NPOV disputes (February 2011), References needed (September 2013), Vague or ambiguous time (April 2014)
Pi BoötisLow Stub1 May 2010References needed (May 2010)
Pi HerculisMid C1 Citation with format and no URL
Pi Mensae bLow Start1 April 2010Unsourced statements (April 2010)
Pi ScorpiiMid C1 January 2012Unsourced statements (January 2012)
Pi3 OrionisMid C1 April 2012Weasel-worded phrases (April 2012)
Piazzi Smyth (crater)Low Start1 April 2009In-text citations lacking (April 2009)
Pickup IonLow Start4 January 2016Expert attention needed (January 2016), Too technical (January 2016), Orphaned (July 2016)
Pierre Auger ObservatoryMid C2 August 2014Unsourced statements (August 2014), Vague or ambiguous time (August 2014)
Pierre Louis MaupertuisUnknown C1 May 2017Unsourced statements (May 2017)
Pierre-Simon LaplaceHigh B2 August 2016Style editing needed (August 2016), Unsourced statements (August 2016)
Pieter Dirkszoon KeyserLow Start3 July 2012Unsourced statements (November 2012, July 2012), References needed (July 2012)
Pinwheel nebulaLow Stub1 February 2017Sources lacking (February 2017)
Pioneer anomalyLow C4 July 2011Unsourced statements (July 2011), Accuracy disputes (January 2014), Vague or ambiguous time (October 2017), Update needed (October 2017)
Pipe NebulaLow Start1 December 2014References needed (December 2014)
Piscis AustrinusMid Start1 July 2011Unsourced statements (July 2011)
Pisgah Astronomical Research InstituteUnknown Stub2 April 2014Expansion needed (April 2014), In-text citations lacking (April 2014)
PlanetTop FA1 November 2013Potentially dated statements (November 2013)
Planet HuntersBottom Start1 October 2012Reliable references lacking (October 2012)
Planet LofotenUnknown Stub1 January 2011References needed (January 2011)
Planet NineTop GA5 2016Expert attention needed (October 2017), Potentially dated statements (2016), Failed verification (March 2017), Too technical (October 2017)
Planet symbolsMid B2 September 2016Year an event occurred needed (September 2016), Clarification needed (November 2016)
PlanetariumMid Start2 October 2008Unsourced statements (October 2008), Split needed (July 2014)
Planetary Science Decadal SurveyMid Start1 March 2011Expansion needed (March 2011)
Planetary bodyLow Stub2 August 2015Disputed statements (August 2015), References needed (September 2016)
Planetary differentiationMid Start2 July 2012Unsourced statements (July 2012), References needed (September 2013)
Planetary habitabilityMid B2 Citation with accessdate and no URL, Reference errors
Planetary scienceHigh C1 May 2009In-text citations lacking (May 2009)
Planetary systemTop C2 November 2014Unsourced statements (December 2014), Potentially dated statements (November 2014)
Planetary transits and occultationsLow Start3 October 2013Unsourced statements (October 2013, November 2016), References needed (November 2016)
Planets beyond NeptuneHigh FA1 2015Potentially dated statements (2015)
Planets in science fictionBottom C3 June 2013Unsourced statements (June 2013), Dead external links (August 2016, August 2017)
PlanisphereLow C1 June 2008References needed (June 2008)
Plasma cosmologyLow B2 September 2012Reliable references lacking (September 2012), Disputed statements (April 2017)
PlutinoMid C2 August 2013Unsourced statements (September 2015, August 2013)
PlutoidMid GA2 2009Potentially dated statements (2009), Weasel-worded phrases (October 2017)
Pluton (complex)High Start2 May 2012Expansion needed (May 2012), Update needed (December 2016)
Polar alignmentLow Stub1 July 2016Reliable references lacking (July 2016)
Polar mesospheric summer echoesLow Start1 January 2017In-text citations lacking (January 2017)
Polaris flareLow Stub2 July 2016Expansion needed (July 2016), Orphaned (July 2016)
Pole starMid Start3 2000Potentially dated statements (2000), Unsourced statements (February 2012, July 2016)
PolophylaxLow Stub1 December 2009Sources lacking (December 2009)
Portingbury HillsBottom Start1 Citation with accessdate and no URL
Potential cultural impact of extraterrestrial contactBottom GA2 September 2015Weasel-worded phrases (September 2015), CS1 errors: external links
Potentially hazardous objectMid Start1 March 2017Potentially dated statements (March 2017)
Powell ObservatoryLow Stub1 April 2017Weasel-worded phrases (April 2017)
Pr0211 cLow Stub1 December 2016References needed (December 2016)
Pre-main-sequence starTop Start1 August 2014References needed (August 2014)
President of the Royal Astronomical SocietyLow Start1 2015Potentially dated statements (2015)
Prime meridianHigh C3 July 2013Unsourced statements (July 2013, February 2015), Clarification needed (December 2016)
Primordial black holeHigh Start3 February 2012Unsourced statements (February 2012), Clarification needed (February 2012), CS1 errors: missing author or editor
Primordial fluctuationsHigh Start3 October 2009In-text citations lacking (October 2009), Merge needed (August 2016), Clarification needed (March 2017)
Priyamvada NatarajanMid Start2 August 2011BLP articles lacking sources (August 2011), In-text citations lacking (August 2011)
Problem of why there is anything at allUnknown Start1 August 2017Unsourced statements (August 2017)
Proctor (lunar crater)Low Start1 June 2016Dead external links (June 2016)
Project CyclopsLow Start5 November 2012Expert attention needed (November 2012), Cleanup needed (November 2012), Prose needed (November 2012), Too technical (November 2012)
Project DianaUnknown Start1 July 2010References needed (July 2010)
Project Phoenix (SETI)Mid Stub1 September 2014References needed (September 2014)
Proper names (astronomy)Low Start2 October 2011Clarification needed (October 2011), Expansion needed (October 2012)
Proton–proton chain reactionHigh C2 March 2008References needed (September 2009), Unsourced statements (March 2008)
ProtostarTop C1 March 2016Unsourced statements (March 2016)
Provisional designation in astronomyMid C1 June 2014Dead external links (June 2014)
Prutenic TablesLow Start1 January 2015Vague or ambiguous time (January 2015)
PtolemyHigh C1 April 2009Unsourced statements (April 2009)
Puckett ObservatoryLow Start2 December 2012In-text citations lacking (December 2012), Notability unclear (January 2016)
Pulkovo meridianLow Stub1 March 2016Unsourced statements (March 2016)
Pulsar clockLow Stub1 May 2016Dead external links (May 2016)
Pulsar kickMid C1 April 2009In-text citations lacking (April 2009)
Pulsating white dwarfMid Start2 November 2016Clarification needed (November 2016), Reference cleanup (November 2016)
Pulsational pair-instability supernovaMid Start1 November 2014Sources lacking (November 2014)
Push broom scannerLow Stub1 April 2017Unsourced statements (April 2017)
Pyrotechnic valvesLow Stub2 February 2009Reliable references lacking (February 2009), Orphaned (February 2012)
PythagorasUnknown B1 May 2015Unsourced statements (May 2015)
Q-type asteroidLow Stub1 June 2016References needed (June 2016)
QSR J1819+3845Low Start1 October 2009Vague or ambiguous time (October 2009)
QUaDLow Stub1 July 2016Dead external links (July 2016)
Qatar-3bLow Stub1 December 2016References needed (December 2016)
Qingde WangUnknown Stub1 May 2011BLP articles lacking sources (May 2011)
QuadrantidsLow Start2 January 2016External link cleanup (January 2016), Spam cleanup (January 2016)
Quantum cosmologyHigh Start1 CS1 errors: dates
Quantum mechanicsMid B4 April 2016Unsourced statements (April 2016), Reliable references lacking (June 2016), Dead external links (July 2016, August 2016)
Quark epochMid Stub1 July 2016Dead external links (July 2016)
Quark starMid C4 2011Potentially dated statements (2011), Web citation with no URL, Unsourced statements (March 2014), References needed (December 2015)
QuasarTop B2 June 2011Unsourced statements (May 2014), Potentially dated statements (June 2011)
Quasars, Redshifts and ControversiesLow Start2 April 2010Unsourced statements (April 2010, November 2012)
Quasi-periodic oscillationMid Start1 October 2009References needed (October 2009)
Qubic experimentLow Stub1 October 2017Links needing disambiguation (October 2017)
Qutb al-Din al-ShiraziUnknown Start2 December 2011Unsourced statements (December 2011), Citation with accessdate and no URL
R ApodisLow Stub1 January 2012Unsourced statements (January 2012)
R CancriLow Stub1 August 2016Unsourced statements (August 2016)
R CarinaeLow Stub1 July 2007Sources lacking (July 2007)
R MonocerotisLow Stub1 February 2016References needed (February 2016)
R-processHigh Start2 June 2010References needed (June 2010), Unsourced statements (August 2012)
R-type asteroidLow Stub1 December 2009Sources lacking (December 2009)
RAFGLLow Stub2 October 2009Introduction cleanup (October 2009), Context needed (October 2009)
RAVE (survey)Low C1 August 2014Unsourced statements (August 2014)
RCW 49Low Stub1 December 2016References needed (December 2016)
RCW 79Low Stub1 November 2012References needed (November 2012)
RCW103Low Stub1 November 2016Sources lacking (November 2016)
RIK-210Low Stub3 August 2017References needed (August 2017), Orphaned (August 2017), Wikilinks needed (August 2017)
RIT ObservatoryLow Start1 October 2014Sources lacking (October 2014)
ROSATLow C4 September 2011Unsourced statements (November 2012), Expansion needed (September 2011), Clarification needed (September 2011), CS1 errors: external links
RR CentauriLow Start1 2017DOIs inactive (2017)
RS Canum Venaticorum variableMid Start1 April 2009In-text citations lacking (April 2009)
RS PerseiLow Start1 Reference errors
RT-64Low List2 November 2016Coordinates needed, References needed (November 2016)
RT-70Low List1 July 2013Sources lacking (July 2013)
RX J0806.3+1527Mid Start1 December 2013Unsourced statements (December 2013)
RX J0852.0-4622Low Start1 March 2016Unsourced statements (March 2016)
RX J1347.5-1145Low Start2 November 2012References needed (November 2012), Expansion needed (August 2017)
RX J1416.5+2315Low Stub1 February 2009Orphaned (February 2009)
Rachael PadmanUnknown C1 Web citation with no URL
Radiative equilibriumMid C1 April 2011Style editing needed (April 2011)
Radiative levitationMid Stub2 June 2017Orphaned (June 2017), Wikilinks needed (June 2017)
Radio Solar Telescope NetworkLow Start1 August 2013Sources lacking (August 2013)
Radio relicsLow Start1 April 2013In-text citations lacking (April 2013)
Radio telescopeHigh B3 December 2010Unsourced statements (December 2010, August 2016), Potentially dated statements (2016)
Radio-quiet neutron starMid Stub2 December 2015References needed (December 2015), Unsourced statements (November 2016)
RadiometryHigh Start1 December 2015References needed (December 2015)
Radiophysical Research InstituteLow Stub1 Coordinates needed
Ramsden (crater)Low Start1 November 2015In-text citations lacking (November 2015)
Ramus PomiferLow Stub1 February 2015References needed (February 2015)
Range rateUnknown Stub5 November 2015Expert attention needed (November 2015), Original research (November 2015), References needed (June 2016), Orphaned (November 2015)
Real Instituto y Observatorio de la ArmadaUnknown Stub1 January 2013Expansion needed (January 2013)
Recessional velocityUnknown Stub1 July 2017References needed (July 2017)
Red dwarfHigh C1 May 2016Unsourced statements (May 2016)
Red giantHigh B1 April 2015Update needed (April 2015)
Redshift quantizationLow B1 July 2017Unsourced statements (July 2017)
Refracting telescopeHigh Start3 May 2010References needed (May 2010, May 2014), Unsourced statements (November 2011)
Regiment of the North PoleLow Stub2 December 2009Sources lacking (December 2009), Orphaned (December 2009)
RegiomontanusMid C2 March 2017Disputed statements (March 2017), Year an event occurred needed (March 2017)
Regiomontanus (crater)Low Start1 October 2012In-text citations lacking (October 2012)
RegistaxBottom Stub2 May 2013Reliable references lacking (May 2013), References needed (May 2013)
RegulusHigh C1 May 2015Unsourced statements (May 2015)
Reichenbach (crater)Low Start1 September 2017In-text citations lacking (September 2017)
Reimarus (crater)Low Start1 April 2010In-text citations lacking (April 2010)
ReionizationHigh B3 January 2015CS1 errors: dates, Unsourced statements (January 2015, August 2017)
Relativistic beamingMid C1 March 2014References needed (March 2014)
Relativistic imagesUnknown Stub3 January 2011Cleanup needed (January 2011, January 2011), Orphaned (January 2011)
Relic abundanceUnknown Start3 October 2015Expert attention needed (October 2015), Expansion needed (October 2015)
Relic particlesLow Stub1 December 2009Sources lacking (December 2009)
Religious cosmologyTop Start1 August 2017References needed (August 2017)
Remote Astronomical Society Observatory of New MexicoLow Stub1 May 2009References needed (May 2009)
Remote Telescope Markup LanguageBottom Stub2 October 2009References needed (October 2009), Notability unclear (October 2009)
ReticleMid C1 February 2009References needed (February 2009)
Revelation 12 sign prophecyBottom Start3 August 2017Reliable references lacking (September 2017, August 2017), Unsourced statements (September 2017)
Rhea (moon)High C4 February 2013Detailed references needed, Unsourced statements (February 2013, May 2015), CS1 errors: external links
RheasilviaLow Start2 April 2017CS1 errors: external links, Unsourced statements (April 2017)
Rho Ophiuchi cloud complexMid C1 September 2015Reliable references lacking (September 2015)
Riccardo GiacconiHigh Start1 February 2013BLP articles lacking sources (February 2013)
Richard Christopher CarringtonLow C1 August 2010In-text citations lacking (August 2010)
Richard D. LinesLow Stub2 January 2016References needed (January 2016), Notability unclear (January 2016)
Richard Davis (astronomer)Unknown Start1 May 2016Unsourced statements (May 2016)
Richard Ellis (astronomer)Mid Start1 March 2017Unsourced statements (March 2017)
Richard Green (astronomer)Mid Stub1 August 2015Expansion needed (August 2015)
Richard HuziakMid Start2 January 2016Notability unclear (January 2016), Clarification needed (January 2016)
Richard P. BinzelLow Stub1 December 2007Unsourced statements (December 2007)
Richard SheepshanksLow Start2 February 2012Unsourced statements (February 2012, June 2013)
Rider's British MerlinLow Start1 March 2013Sources lacking (March 2013)
Right ascensionHigh Start1 May 2012References needed (May 2012)
Rima AriadaeusLow Stub1 September 2016References needed (September 2016)
Rimae AristarchusLow Stub1 February 2017Sources lacking (February 2017)
Rings of CharikloLow B1 CS1 errors: external links
Rings of SaturnTop B1 July 2008Unsourced statements (July 2008)
Rittenhouse (crater)Low Start1 March 2012Unsourced statements (March 2012)
Robert Burnham Jr.Low Start1 February 2017Unsourced statements (February 2017)
Robert George HarringtonUnknown Stub1 Citation with accessdate and no URL
Robert H. DickeUnknown Start3 September 2008Unsourced statements (September 2008), Reliable references lacking (June 2010), Weasel-worded phrases (May 2012)
Robert KirshnerUnknown Stub1 February 2013BLP articles lacking sources (February 2013)
Robert's QuartetLow Stub2 September 2017Unsourced statements (September 2017), Weasel-worded phrases (September 2017)
Robin HeathLow Start3 June 2013Notability unclear (January 2014), BLP articles lacking sources (June 2013), Vague or ambiguous geographic scope (June 2013)
RoboNetLow Start1 October 2009Sources lacking (October 2009)
Robotic telescopeHigh C1 February 2010References needed (February 2010)
Roche limitHigh C1 July 2017Original research (July 2017)
Roche lobeMid Start1 May 2008References needed (May 2008)
Rock cometUnknown Start2 July 2016Citation with accessdate and no URL, Failed verification (July 2016)
Rogelio Bernal AndreoLow Start1 September 2012Unsourced statements (September 2012)
Roger AngelLow Stub1 December 2016Unsourced statements (December 2016)
Roger Joseph BoscovichUnknown B2 September 2012References needed (November 2012), Unsourced statements (September 2012)
Rogier WindhorstMid Stub1 February 2009Orphaned (February 2009)
Rogue planetLow C6 December 2016Vague or ambiguous time (December 2016), Unsourced statements (December 2016), Weasel-worded phrases (December 2016), References needed (December 2016, June 2017), Trivia sections (June 2017)
Roque de los Muchachos ObservatoryHigh Start1 March 2016Unsourced statements (March 2016)
Roseland ObservatoryLow Stub2 October 2007References needed (October 2007), Orphaned (February 2009)
Rosemary WyseLow Stub1 March 2017Dead external links (March 2017)
Ross 248Mid C1 CS1 errors: external links
Ross 47Low Stub1 September 2015References needed (September 2015)
Rotating radio transientMid C1 March 2015Potentially dated statements (March 2015)
RotationHigh C1 March 2014References needed (March 2014)
Roy Henry GarstangUnknown Start1 September 2015Orphaned (September 2015)
Royal Observatory, Cape of Good HopeMid C1 February 2017Clarification needed (February 2017)
Royal Observatory, GreenwichMid C2 October 2016Unsourced statements (October 2016), References needed (August 2017)
Royal starsLow Stub2 August 2008References needed (August 2008), Unsourced statements (June 2016)
Rozhen ObservatoryLow Start2 April 2011Unsourced statements (April 2011), CS1 errors: dates
Rubin–Ford effectLow Start1 Citation with accessdate and no URL
Rudolphine TablesLow Start2 August 2010Unsourced statements (August 2010, September 2013)
Ruth Agnes DalyUnknown Start1 January 2015Orphaned (January 2015)
Rybicki Press algorithmUnknown Stub2 July 2015Unsourced statements (July 2015), Notability unclear (July 2015)
Ryle TelescopeLow Start1 April 2017Sources lacking (April 2017)
Rømer's determination of the speed of lightLow B1 May 2017Dead external links (May 2017)
S CarinaeLow Stub1 December 2009Sources lacking (December 2009)
S. CofréLow Stub1 November 2008Unsourced statements (November 2008)
S/2003 J 2Low Stub1 2017Potentially dated statements (2017)
S0–102Mid Start1 April 2017Unsourced statements (April 2017)
S5 0014+81Mid Start2 November 2016Unsourced statements (November 2016), Clarification needed (July 2017)
SAAO LibraryMid Stub3 July 2014Coordinates needed, References needed (July 2014), Orphaned (July 2014)
SAFARI imaging spectrometerLow Start1 May 2012References needed (May 2012)
SAX J1808.4-3658Low Stub1 January 2017References needed (January 2017)
SCR 1845-6357Low Start1 CS1 errors: external links
SDSS J0927+2943Unknown Stub2 October 2017Reference errors, Clarification needed (October 2017)
SDSS J1106+1939Low Stub1 December 2016References needed (December 2016)
SDSS J1254+0846Unknown Start1 December 2013Orphaned (December 2013)
SETI InstituteLow Start2 March 2014References needed (September 2014), Unsourced statements (March 2014)
SETI@homeHigh Start12 October 2005Potentially dated statements (2007, October 2005, March 2009, June 2013), Unsourced statements (December 2007, February 2007, October 2014, May 2015), Vague or ambiguous time (May 2012, March 2014, May 2014), Update needed (November 2014)
SGR 0525-66Low Stub1 May 2017Unsourced statements (May 2017)
SGR 1806-20Mid Start4 December 2012References needed (December 2012), Potentially dated statements (2016), Links needing disambiguation (December 2016), Unsourced statements (January 2017)
SGR J1550-5418Low Stub1 December 2011Unsourced statements (December 2011)
SHALOM (satellite)Low Stub1 July 2016Update needed (July 2016)
SIMP J013656.5+093347Low Stub1 January 2017References needed (January 2017)
SIPS 1259-4336Low Stub2 February 2015Introduction cleanup (February 2015), Context needed (February 2015)
SN 1006High C2 May 2016Cleanup needed (May 2016, May 2016)
SN 1054Mid C6 March 2011Unsourced statements (March 2011, July 2011, April 2013), References needed (April 2013), Clarification needed (April 2013), Weasel-worded phrases (April 2013)
SN 1572Mid B1 February 2016Unsourced statements (February 2016)
SN 1987AHigh C2 November 2012Unsourced statements (November 2012, February 2017)
SN 2005ELow Start1 April 2012Orphaned (April 2012)
SN 2006FLow Stub2 February 2009Orphaned (February 2009), Sources lacking (December 2009)
SN 2006gyMid Start1 Citation with format and no URL
SN 2007biMid Stub1 April 2015In-text citations lacking (April 2015)
SN 2008haMid Start2 URL error, CS1 errors: dates
SN 2009gjLow Stub1 October 2013Orphaned (October 2013)
SN 2011byLow Stub1 October 2013Orphaned (October 2013)
SN 2011dhLow Start3 Web citation with no URL, Citation with accessdate and no URL, CS1 errors: dates
SN 2014JMid C1 2016Potentially dated statements (2016)
SOHO 2333Low Stub3 October 2012References needed (October 2012), Notability unclear (October 2012), Orphaned (October 2012)
SOPHIE échelle spectrographLow Start3 October 2015Expert attention needed (October 2015), Too technical (October 2015)
SagittaMid Start1 November 2009Unsourced statements (November 2009)
Sagittarius (constellation)Top C2 2002Potentially dated statements (2002), Unsourced statements (July 2015)
Sagittarius AMid Start1 November 2012Weasel-worded phrases (November 2012)
Sagittarius A*Top B1 August 2013Unsourced statements (August 2013)
Sagittarius Dwarf Spheroidal GalaxyMid C1 August 2016Clarification needed (August 2016)
Sagittarius Star CloudMid Stub1 February 2007Unsourced statements (February 2007)
Saji ObservatoryLow Stub1 November 2016In-text citations lacking (November 2016)
Samad RizviUnknown Stub2 October 2013References needed (September 2014), Notability unclear (October 2013)
San Pedro Valley ObservatoryLow Stub1 March 2015Orphaned (March 2015)
Santa Lucia Stroncone Astronomical ObservatoryLow Stub1 January 2014Dead external links (January 2014)
Sanxing (deities)Low Start1 August 2017References needed (August 2017)
Sarah BridleMid Start1 May 2016Dead external links (May 2016)
Sarah Lee LippincottLow Start2 October 2010Dead external links (October 2010), CS1 errors: external links
Saraswati SuperclusterLow Stub1 July 2017Reliable references lacking (July 2017)
Saros (astronomy)Low B2 March 2011Unsourced statements (March 2011, December 2014)
Satellite flareBottom Start1 November 2016Unsourced statements (November 2016)
Satellite system (astronomy)Low C1 CS1 errors: external links
SaturnTop FA1 October 2017Failed verification (October 2017)
Saturn's hexagonUnknown C1 June 2017Accuracy disputes (June 2017)
Savilian Professor of AstronomyLow FL2 February 2015Potentially dated statements (2015, February 2015)
Scale factor (cosmology)Low Start1 May 2016Merge needed (May 2016)
Schelte J. BusLow Stub4 October 2015Citation with accessdate and no URL, Citation with format and no URL, Dead external links (October 2015), Unsourced statements (August 2017)
Schiller (crater)Low Start1 January 2009Unsourced statements (January 2009)
Schmidt-Väisälä cameraLow Start1 October 2007References needed (October 2007)
Schwarzschild (crater)Low Start1 February 2011In-text citations lacking (February 2011)
Scipione ChiaramontiLow Stub1 February 2017Orphaned (February 2017)
ScorpiusTop C1 March 2015Style editing needed (March 2015)
Scott Jay KenyonUnknown Start1 November 2012Unsourced statements (November 2012)
Scott TremaineMid C3 October 2010Dead external links (October 2010, September 2017, October 2017)
Sculptor (constellation)Mid Start2 December 2013Unsourced statements (December 2013), Reference errors
Sculptor Dwarf Irregular GalaxyLow Stub1 February 2007Unsourced statements (February 2007)
Scutum (constellation)Mid Start1 August 2011References needed (August 2011)
Scutum–Centaurus ArmMid Start1 Citation with format and no URL
Sea (astronomy)Bottom Stub1 November 2009References needed (November 2009)
Seagrave Memorial ObservatoryLow Start1 March 2015Orphaned (March 2015)
Search for extraterrestrial intelligenceHigh B5 April 2009Unsourced statements (April 2009, July 2011, May 2017), Original research (September 2012), Reliable references lacking (July 2015)
Seiji UedaLow Stub1 February 2007Unsourced statements (February 2007)
Seleucus (crater)Low Start1 January 2015Unsourced statements (January 2015)
Seleucus of SeleuciaMid Start1 May 2016Unsourced statements (May 2016)
Self-gravitationLow C1 December 2013Peacock terms (December 2013)
Sentinel Space TelescopeUnknown Start3 March 2013Unsourced statements (March 2013), Potentially dated statements (April 2013, June 2017)
Sentry (monitoring system)Low Start1 February 2017Potentially dated statements (February 2017)
September equinoxHigh Start1 September 2017References needed (September 2017)
Sergey BelyavskyLow Stub1 February 2016References needed (February 2016)
SerpensTop FA2 September 2017DOIs inactive (2017), Dead external links (September 2017)
Serrurier trussMid Stub1 January 2013Unsourced statements (January 2013)
Seth Barnes NicholsonLow Start1 May 2008References needed (May 2008)
Sex on the MoonLow Start2 Web citation with no URL, Citation with accessdate and no URL
SextantBottom C1 January 2015Unsourced statements (January 2015)
Sh2-308Low Start1 April 2017Expansion needed (April 2017)
Shadow bandsUnknown Stub1 March 2011Unsourced statements (March 2011)
Shadow squareLow Stub1 April 2010Failed verification (April 2010)
Shandong UniversityLow B2 July 2014Unsourced statements (July 2014), Reference errors
Shanghai Astronomical ObservatoryMid Stub1 November 2008References needed (November 2008)
Shape of the universeHigh Start4 November 2007References needed (November 2007), Expert attention needed (April 2017), Clarification needed (April 2017)
Sharpless 2-88Low Stub2 June 2016Introduction cleanup (June 2016), Context needed (June 2016)
Sharpless catalogLow Start1 August 2009Expansion needed (August 2009)
Shattuck ObservatoryLow Stub1 January 2012Unsourced statements (January 2012)
Shi ShenMid Start2 December 2015Unsourced statements (December 2015), CS1 errors: external links
Shin HirayamaUnknown Stub2 February 2016Expansion needed (February 2016), In-text citations lacking (February 2016)
Shosanbetsu observatoryLow Stub1 February 2009Orphaned (February 2009)
Siding Spring 2.3 m TelescopeLow Stub1 August 2014Unsourced statements (August 2014)
Siding Spring ObservatoryLow Start2 October 2013Unsourced statements (October 2013), References needed (October 2013)
Sidus LudovicianaLow Stub1 June 2011Expansion needed (June 2011)
Sigma AquariiLow Start1 May 2010Unsourced statements (May 2010)
Sigma HydraeLow Start1 May 2017Unsourced statements (May 2017)
Sigma LibraeMid C1 March 2017Unsourced statements (March 2017)
Sigma SagittariiMid Start1 January 2012Unsourced statements (January 2012)
Sigma-D relationLow Stub1 November 2016Orphaned (November 2016)
Sikhote-Alin meteoriteMid C2 March 2012Dead external links (March 2012), References needed (February 2017)
Simon MariusLow Start1 November 2016Unsourced statements (November 2016)
Simon MittonLow Start1 February 2009BLP articles lacking sources (February 2009)
Simon Ratcliffe (astronomer)Unknown Stub1 November 2016Notability unclear (November 2016)
Simon WhiteMid C1 December 2011BLP articles lacking sources (December 2011)
Simone ZaggiaLow Stub3 April 2010Notability unclear (April 2010), Orphaned (January 2011), BLP articles lacking sources (May 2011)
Sirius in fictionLow Start2 February 2013Unsourced statements (July 2013), Style editing needed (February 2013)
Sitnikov problemUnknown Start4 August 2015Original research (August 2015), In-text citations lacking (August 2015), External link cleanup (August 2015), Spam cleanup (August 2015)
Skalnaté pleso ObservatoryMid Stub2 May 2017Sources lacking (May 2017), Expansion needed (May 2017)
Skinakas ObservatoryLow Stub1 June 2017References needed (June 2017)
SkyMid C1 October 2014Clarification needed (October 2014)
Sky-Map.orgBottom Stub2 December 2013Unsourced statements (May 2014), References needed (December 2013)
Sky-WatcherBottom Start2 September 2011In-text citations lacking (September 2011), Promotional tone (August 2015)
SkyScoutBottom Start2 March 2009Unsourced statements (March 2009), Expansion needed (January 2011)
SkyToolsBottom Stub1 February 2009Orphaned (February 2009)
Slacker AstronomyLow Stub2 March 2014References needed (March 2014), Reliable references lacking (March 2014)
SloohMid Start3 October 2009Reliable references lacking (October 2009), Introduction cleanup (October 2009), Potentially dated statements (April 2014)
Smadar NaozLow Start3 June 2016Unsourced statements (June 2016), Reliable references lacking (June 2016), BLP articles lacking sources (June 2016)
Smithsonian Astrophysical ObservatoryMid Start2 February 2012Incomplete lists (February 2012), References needed (February 2013)
Sneden's StarLow Start1 May 2016References needed (May 2016)
Sociedade Astronômica BrasileiraLow Stub1 September 2017Incomplete lists (September 2017)
Soft X-ray transientMid Start1 September 2009References needed (September 2009)
Software BisqueLow Start3 April 2010Unsourced statements (April 2010, April 2016), References needed (April 2010)
Solar and Heliospheric ObservatoryMid B2 April 2014Potentially dated statements (April 2014), In-text citations lacking (February 2015)
Solar apexMid Stub1 March 2013References needed (March 2013)
Solar coreMid Start2 November 2015Unsourced statements (November 2015), Web citation with no URL
Solar cycleMid C4 July 2015Unsourced statements (July 2015, August 2015), Dead external links (November 2016, February 2017)
Solar cycle 23Low Start1 February 2013Unsourced statements (February 2013)
Solar dynamoMid Start2 August 2014References needed (August 2014), Expansion needed (August 2014)
Solar eclipseTop FA1 October 2017Dead external links (October 2017)
Solar eclipse of April 17, 1912Low Stub2 September 2014Dead external links (September 2014), Broken or outdated citations (September 2014)
Solar eclipse of August 1, 2008Low Start1 August 2008Unsourced statements (August 2008)
Solar eclipse of August 21, 2017Low B1 August 2017Unsourced statements (August 2017)
Solar eclipse of February 26, 1998Low Stub1 December 2010Expansion needed (December 2010)
Solar eclipse of July 11, 2010Low Stub1 July 2010Unsourced statements (July 2010)
Solar eclipse of July 28, 1851Low Start1 August 2017Reliable references lacking (August 2017)
Solar eclipse of May 3, 1715Low Stub1 August 2017Unsourced statements (August 2017)
Solar energetic particlesLow Stub1 September 2011Sources lacking (September 2011)
Solar flareMid C1 August 2013Unsourced statements (August 2013)
Solar observationMid Stub2 July 2015References needed (July 2015), Expansion needed (August 2015)
Solar particle eventUnknown Start1 March 2011In-text citations lacking (March 2011)
Solar phenomenaUnknown C2 January 2014Unsourced statements (January 2014), Web citation with no URL
Solar symbolBottom Start1 November 2016Year an event occurred needed (November 2016)
Solar weatherUnknown Stub2 March 2015Orphaned (March 2015), Wikilinks needed (September 2015)
SolsticeTop C2 June 2012References needed (June 2012, June 2013)
Sonneberg ObservatoryLow Stub1 August 2017Expansion needed (August 2017)
Sonnenborgh ObservatoryMid Stub1 March 2015Sources lacking (March 2015)
Source countsLow Start1 December 2009Sources lacking (December 2009)
South Pole TelescopeUnknown C2 2013Potentially dated statements (2013), Dead external links (March 2017)
South StarLow Stub1 2000Potentially dated statements (2000)
Southern African Large TelescopeMid B1 April 2013References needed (April 2013)
Southern Celestial HemisphereUnknown Stub4 August 2017Disputed statements (August 2017), Unsourced statements (August 2017), Weasel-worded phrases (August 2017), References needed (August 2017)
Southern Delta AquariidsLow Start3 July 2014Detailed references needed, Unsourced statements (July 2014), Reference errors
Southland Astronomical SocietyLow Start1 January 2010Reliable references lacking (January 2010)
Southland Astronomical Society ObservatoryLow Start1 January 2010Sources lacking (January 2010)
SpARCS1049+56Low Stub1 September 2015Orphaned (September 2015)
Space (novel)Bottom Start1 August 2010Sources lacking (August 2010)
Space Atlas: Mapping the Universe and BeyondLow Start2 June 2013Notability unclear (June 2013), Promotional tone (June 2013)
Space Interferometry MissionLow GA2 October 2015Weasel-worded phrases (October 2015), Introduction cleanup (October 2015)
Space Telescope Science InstituteMid C1 February 2011References needed (February 2011)
Space Vacuum Epitaxy CenterLow Stub1 September 2010Update needed (September 2010)
Space artBottom Start2 May 2007Original research (May 2007), CS1 errors: external links
Space medicineLow C7 September 2009Unsourced statements (May 2014, January 2010, February 2012, June 2015), Prose needed (September 2009), Cleanup needed (September 2009), Reference errors
Space telescopeMid Start1 September 2017Expansion needed (September 2017)
Space.comBottom Start5 January 2011Unsourced statements (January 2011, December 2013), Citation with accessdate and no URL, Update needed (February 2014), Potentially dated statements (March 2016)
SpaceguardLow Start1 April 2012Unsourced statements (April 2012)
Special Astrophysical Observatory of the Russian Academy of ScienceLow Start1 February 2016References needed (February 2016)
Speckle imagingMid Start2 July 2016Clarification needed (July 2016, October 2016)
Speckle maskingLow Stub1 December 2009Sources lacking (December 2009)
Spectral atlasUnknown Stub2 July 2013Cleanup needed (July 2013, July 2013)
Spectroscopic parallaxUnknown Start1 May 2007References needed (May 2007)
SpectroscopyTop B4 April 2016Citation with format and no URL, References needed (April 2016), Cleanup needed (April 2016), Prose needed (April 2016)
Spektr-RLow Stub2 October 2014References needed (October 2014), CS1 errors: dates
Spektr-RGLow Stub1 April 2016Potentially dated statements (April 2016)
SpicaHigh C1 Citation with accessdate and no URL
Square Kilometre ArrayMid Start6 May 2012References needed (May 2012), Potentially dated statements (2014, August 2014), CS1 errors: chapter ignored, Reliable references lacking (July 2016), Merge needed (December 2016)
St. Thomas ObservatoryLow Stub1 July 2017Orphaned (July 2017)
Stability of the Solar SystemMid C2 July 2010Unsourced statements (July 2010), Expansion needed (November 2013)
Standard gravitational parameterLow Start1 August 2016Unsourced statements (August 2016)
Standard solar modelMid C1 April 2011Unsourced statements (April 2011)
StarTop FA1 October 2017Dead external links (October 2017)
Star GazersLow C3 June 2016Citation with bare URL, Dead external links (June 2016), Unsourced statements (January 2017)
Star WalkMid Start3 July 2013References needed (July 2013), Promotional tone (July 2013), NPOV disputes (July 2013)
Star catalogueHigh Start2 2006Potentially dated statements (2006), Weasel-worded phrases (August 2011)
Star countLow Start1 March 2012Sources lacking (March 2012)
Star diagonalLow Start1 October 2006References needed (October 2006)
Star positionUnknown Start1 November 2010Sources lacking (November 2010)
Star systemTop C2 January 2010Unsourced statements (January 2010, June 2016)
Star trailLow Stub1 Citation with accessdate and no URL
Star-painted ceilingLow Stub2 April 2017Unsourced statements (April 2017, May 2017)
Stardome ObservatoryLow Start1 October 2014References needed (October 2014)
Stargate (asterism)Low Start1 March 2015Orphaned (March 2015)
Starlink ProjectLow C2 February 2017Unsourced statements (February 2017), References needed (February 2017)
Starlite (video game)Low Start2 September 2012References needed (September 2012), Unsourced statements (December 2014)
Starmus FestivalUnknown Stub3 June 2014Coordinates needed, Reliable references lacking (June 2014), CS1 errors: external links
Starry Messenger (picture book)Low Start1 August 2016In-text citations lacking (August 2016)
StarspotHigh Start1 August 2008Expansion needed (August 2008)
StellafaneUnknown Start1 August 2009References needed (August 2009)
Stellar black holeHigh Start2 April 2008Potentially dated statements (April 2008), Unsourced statements (November 2010)
Stellar collisionUnknown Start1 October 2017Weasel-worded phrases (October 2017)
Stellar constellations in fictionLow Stub3 June 2014Expansion needed (June 2014), Orphaned (December 2014), Links needing disambiguation (December 2016)
Stellar designationHigh Start1 October 2011Unsourced statements (October 2011)
Stellar driftLow Start1 November 2009References needed (November 2009)
Stellar dynamicsMid Stub1 December 2006References needed (December 2006)
Stellar isochroneUnknown Stub1 June 2013Sources lacking (June 2013)
Stellar kinematicsTop C1 September 2013Unsourced statements (September 2013)
Stellar parallaxHigh C1 CS1 errors: missing author or editor
Stellar populationUnknown C2 January 2015Unsourced statements (January 2015, June 2017)
Stellar pulsationMid Start3 September 2010Original research (September 2010), Style editing needed (September 2010), Conflict of interest (September 2010)
Stellar rotationTop GA1 July 2014Unsourced statements (July 2014)
Stellar structureHigh C1 May 2016Unsourced statements (May 2016)
Stellarium (software)Bottom Start1 April 2016Unsourced statements (April 2016)
StellificationLow Start2 October 2015Orphaned (October 2015), Unsourced statements (December 2016)
Stephen Alexander (astronomer)Low Start1 July 2008References needed (July 2008)
Stephen HawkingHigh B2 Citation with bare URL, Citation lacking title
Stephen R. KaneLow Start1 June 2016Unsourced statements (June 2016)
Stephen WarrenUnknown Start1 March 2017Vague or ambiguous time (March 2017)
Stephenson 2Low Start2 August 2015Citation with format and no URL, Unsourced statements (August 2015)
Sternwarte PeterbergLow Stub3 September 2011Expansion needed (September 2011), Orphaned (March 2015), Sources lacking (September 2017)
Steve FosseyLow Start1 April 2015Unsourced statements (April 2015)
Steven J. OstroMid C2 Citation with bare URL, Citation lacking title
Stock 16Unknown Start1 August 2017References needed (August 2017)
StratopauseLow Stub1 June 2009Sources lacking (June 2009)
StratosphereLow Start1 October 2010References needed (October 2010)
Stratton (crater)Low Start1 April 2014In-text citations lacking (April 2014)
String theoryMid B2 February 2016Weasel-worded phrases (February 2016, November 2016)
Stripe 82Low Stub1 January 2015References needed (January 2015)
Structure formationHigh Start1 July 2014Style editing needed (July 2014)
Struve familyUnknown Start1 April 2015References needed (April 2015)
Strömgren sphereMid Start1 August 2011References needed (August 2011)
Stuttgart ObservatoryLow Start1 May 2015Sources lacking (May 2015)
SuWt 2Low Stub1 December 2016Orphaned (December 2016)
SubgiantMid Start1 April 2016Unsourced statements (April 2016)
Submillimetre Common-User Bolometer ArrayUnknown Start1 Coordinates needed
Submillimetre astronomyHigh Start2 September 2010References needed (September 2010), Dead external links (August 2016)
Subrahmanyan ChandrasekharTop C2 November 2015Unsourced statements (November 2015), Vague or ambiguous time (November 2015)
Substellar objectMid Start1 March 2017Unsourced statements (March 2017)
Sudarsky's gas giant classificationLow Start2 Citation with bare URL, Citation lacking title
Suffa RT-70 radio telescopeLow Stub3 2008Potentially dated statements (2008, 2014), Expansion needed (January 2017)
Sullam al-sama'Low Start1 June 2016Unsourced statements (June 2016)
Summer Science ProgramBottom Start1 February 2012Unsourced statements (February 2012)
Sun transit timeLow Stub1 November 2008Sources lacking (November 2008)
Sun-synchronous orbitLow C4 November 2011Unsourced statements (November 2011), Expert attention needed (December 2013), Too technical (December 2013)
SunlightMid C4 February 2011References needed (February 2011, January 2015), Vague or ambiguous time (December 2016), Unsourced statements (March 2017)
Sunyaev–Zel'dovich ArrayMid Start3 May 2017Coordinates needed, Update needed (May 2017), References needed (May 2017)
Sunyaev–Zel'dovich effectMid Start1 2017DOIs inactive (2017)
Super soft X-ray sourceMid Start1 August 2017Unsourced statements (August 2017)
Super star clusterMid Start1 February 2011Incomplete lists (February 2011)
Super-EarthMid C1 CS1 errors: external links
Super-KamiokandeMid Start2 December 2013Citation lacking title, Vague or ambiguous time (December 2013)
Superhabitable planetMid C2 October 2016CS1 errors: missing author or editor, Clarification needed (October 2016)
Superluminous supernovaHigh Start3 January 2017References needed (January 2017), Self-contradictory articles (January 2017), Factual verification needed (January 2017)
SupermoonLow Start1 September 2015Unsourced statements (September 2015)
SupernovaMid FA1 2010Potentially dated statements (2010)
Supernova remnantHigh C1 July 2008Unsourced statements (July 2008)
Supernovae in fictionLow Start2 May 2008References needed (May 2008), Weasel-worded phrases (November 2011)
Supra-arcade downflowsUnknown C3 November 2015Expert attention needed (November 2015), Too technical (November 2015)
Surtur (moon)Low Stub1 June 2011Dead external links (June 2011)
Surya SiddhantaLow Start2 February 2014References needed (February 2014, August 2017)
Sutherland Astronomical SocietyLow Start1 March 2011References needed (March 2011)
Suzanne MaddenLow Stub1 November 2016BLP articles lacking sources (November 2016)
Svante ArrheniusUnknown C1 August 2017Unsourced statements (August 2017)
Symbiotic starMid Start1 Web citation with no URL
Systemic (amateur extrasolar planet search project)Low Start2 August 2009Reliable references lacking (August 2009), References needed (August 2009)
Systems Tool KitMid Start2 March 2009References needed (March 2009), Unsourced statements (October 2014)
T AndromedaeLow Stub1 March 2016References needed (March 2016)
T AntliaeLow Stub2 February 2016References needed (February 2016), Unsourced statements (March 2017)
T AurigaeLow Stub1 April 2017References needed (April 2017)
T CarinaeLow Stub1 December 2009Sources lacking (December 2009)
T Tauri starHigh C1 January 2017References needed (January 2017)
T Tauri windLow Start3 April 2008References needed (April 2008), Cleanup needed (April 2008, April 2008)
T-type asteroidLow Stub1 December 2009Sources lacking (December 2009)
TRAPPIST-1bLow Stub1 August 2017Clarification needed (August 2017)
TRAPPIST-1dLow Start1 February 2017Update needed (February 2017)
TRAPPIST-1fMid Stub1 February 2017Unsourced statements (February 2017)
TRAPPIST-1hUnknown Stub1 Reference errors
TVLM 513-46546Low Stub1 April 2017In-text citations lacking (April 2017)
TX PisciumLow Stub1 September 2017References needed (September 2017)
Tabetha S. BoyajianLow Start1 2015Potentially dated statements (2015)
Taft E. ArmandroffLow Stub2 December 2016Orphaned (December 2016), Wikilinks needed (December 2016)
Taipei Astronomical MuseumLow Stub2 February 2014Unsourced statements (February 2014), CS1 errors: external links
Taiwanese–American Occultation SurveyLow Start2 May 2010Expert attention needed (May 2010)
Takeshi OkaLow Start1 July 2016BLP articles lacking sources (July 2016)
Talking About LifeLow Start3 May 2013Orphaned (May 2013), Notability unclear (July 2017), Reliable references lacking (July 2017)
Tamara DavisLow Stub1 2016Potentially dated statements (2016)
Tarantula NebulaMid Start1 2017DOIs inactive (2017)
Tau EridaniLow List1 December 2009Unsourced statements (December 2009)
Tau GeminorumMid C1 March 2012Disputed statements (March 2012)
Tau HerculisLow Start1 Citation with format and no URL
Tau SagittariiMid C1 September 2015Unsourced statements (September 2015)
Tau1 CapricorniLow Stub1 December 2009Sources lacking (December 2009)
Tau1 GruisLow Start1 October 2015Unsourced statements (October 2015)
Tau2 EridaniLow Start1 March 2017Unsourced statements (March 2017)
Tau2 GruisLow Stub1 June 2017Notability unclear (June 2017)
TauridsLow C1 November 2012Unsourced statements (November 2012)
Taurus (constellation)Top GA1 2008Potentially dated statements (2008)
Taurus VoidMid Stub1 December 2015Orphaned (December 2015)
Technetium starLow Stub1 CS1 errors: external links
Teen Age MessageLow Start1 Detailed references needed
Teide 1Mid Start1 May 2017Unsourced statements (May 2017)
TelecompressorLow Stub2 September 2016Unsourced statements (September 2016), Vague or ambiguous time (September 2016)
TelescopeTop C1 July 2008References needed (July 2008)
TellStarBottom Start3 January 2012Unsourced statements (January 2012), Expert attention needed (August 2012)
Tempel 1Mid C2 February 2011References needed (February 2011), CS1 errors: external links
Template:ARICNS linkNA Template1 External link templates with potential for greater use
Template:KICNA Template1 Templates with missing or incorrect documentation
Template:NSSDCNA Template2 External link templates with potential for greater use, Templates with missing or incorrect documentation
Terahertz radiationMid C5 July 2007Potentially dated statements (2012), Unsourced statements (July 2007, January 2013, June 2013), Clarification needed (May 2012)
Terebellum (astronomy)Low Stub1 December 2009Sources lacking (December 2009)
Terrestrial planetTop C3 March 2014Unsourced statements (March 2014, December 2016), CS1 errors: external links
Terzan 5Mid Start1 Citation lacking title
Terzan 7Low C1 Citation lacking title
Test targetLow Stub1 December 2009Sources lacking (December 2009)
Thai National ObservatoryLow Stub1 May 2016Unsourced statements (May 2016)
Thaicom 6Low Start1 February 2014Update needed (February 2014)
The Astronomical JournalMid Start1 May 2017Update needed (May 2017)
The Astronomy and Astrophysics ReviewLow Stub1 Citation with accessdate and no URL
The Big Splash (book)Bottom Start1 May 2015Orphaned (May 2015)
The Copernican QuestionLow Start1 CS1 errors: external links
The Dark Energy SurveyLow C3 January 2016Dead external links (January 2016, January 2017), Unsourced statements (November 2016)
The Dish (landmark)Low Start1 August 2014Unsourced statements (August 2014)
The Fabric of the CosmosUnknown C1 July 2012Original research (July 2012)
The Living CosmosLow Start1 May 2015Orphaned (May 2015)
The Magnificent Seven (neutron stars)Mid C1 March 2011Clarification needed (March 2011)
The Planetary SocietyLow C3 January 2012External link cleanup (January 2012), Spam cleanup (January 2012), Peacock terms (October 2016)
The Sky (magazine)Low Start1 January 2010Sources lacking (January 2010)
The Sky at NightMid Start1 April 2012Unsourced statements (April 2012)
The Smithers DivideUnknown Stub6 March 2015Expert attention needed (May 2015), References needed (March 2015), Original research (March 2015), Too technical (May 2015), Orphaned (July 2016)
The Space Place ObservatoryLow Stub1 Coordinates needed
The Spaceguard FoundationLow Start1 2007Potentially dated statements (2007)
The Sun in cultureLow Start1 January 2017Sources lacking (January 2017)
The Universe (TV series)Low Start1 December 2011References needed (December 2011)
The World At NightUnknown Start1 April 2014Potentially dated statements (April 2014)
The building of the First Serbian ObservatoryUnknown C1 June 2017Orphaned (June 2017)
TheSky (astronomy software)Unknown Stub2 July 2015References needed (July 2015), Notability unclear (July 2015)
Theia (planet)Mid Start3 September 2015Unsourced statements (September 2015, May 2017), Dead external links (February 2017)
Theodosius of BithyniaLow Stub1 September 2011References needed (September 2011)
Theoretical planetologyMid Start1 May 2009Dead external links (May 2009)
Thermal time scaleLow Stub1 January 2008References needed (January 2008)
Thermodynamics of the universeMid C3 May 2015Expert attention needed (August 2017), Orphaned (May 2015)
Theta AurigaeMid C1 January 2017Unsourced statements (January 2017)
Theta BoötisLow Start1 January 2016Unsourced statements (January 2016)
Theta ChamaeleontisLow Stub1 August 2017Unsourced statements (August 2017)
Theta EridaniMid C1 June 2013Unsourced statements (June 2013)
Theta PerseiLow Stub1 April 2017Unsourced statements (April 2017)
Theta PictorisLow Stub1 March 2010Unsourced statements (March 2010)
Theta Piscis AustriniLow Start1 May 2017Reliable references lacking (May 2017)
Theta PyxidisLow Start1 July 2017Unsourced statements (July 2017)
Theta ReticuliLow Stub1 July 2017Reliable references lacking (July 2017)
Theta TauriMid Start1 June 2017References needed (June 2017)
Theta TucanaeLow Start1 Citation with accessdate and no URL
Thirty Meter TelescopeHigh C3 May 2010Dead external links (May 2010, December 2016), Unsourced statements (April 2015)
Thomas HarriotHigh B1 June 2009Unsourced statements (June 2009)
Thomas J. BalonekLow Stub1 September 2016Unsourced statements (September 2016)
Thomas King ObservatoryLow Start1 2006Potentially dated statements (2006)
Thomas Wright (astronomer)Unknown Start2 August 2015URL error, Weasel-worded phrases (August 2015)
Thorne–Żytkow objectMid Start1 January 2014Unsourced statements (January 2014)
Three College ObservatoryLow Stub2 March 2016References needed (March 2016), Reliable references lacking (March 2016)
Three-torus model of the universeLow Start2 April 2017Weasel-worded phrases (April 2017), Clarification needed (May 2017)
ThubanMid Start2 July 2015Web citation with no URL, Unsourced statements (July 2015)
Thābit ibn QurraUnknown Start2 April 2016Citation with accessdate and no URL, Unsourced statements (April 2016)
Tidal accelerationHigh C3 February 2007Unsourced statements (February 2007, November 2015, March 2017)
Tidal circularizationLow Stub1 April 2014In-text citations lacking (April 2014)
Tidal lockingHigh C4 August 2010Unsourced statements (August 2010, October 2012, December 2014, January 2016)
Tidal strippingLow Stub1 August 2009Sources lacking (August 2009)
Tim Hunter (astronomer)Low Start1 March 2014In-text citations lacking (March 2014)
TimeTop B6 May 2010Potentially dated statements (May 2010), Unsourced statements (January 2015, August 2015, May 2017), Clarification needed (February 2014), Weasel-worded phrases (August 2015)
Time delay and integrationLow Stub2 Expert attention needed
Time smearingUnknown Stub4 June 2012Expert attention needed (June 2012), Too technical (June 2012), Orphaned (May 2015)
Timeline of Solar System astronomyMid List1 March 2010References needed (March 2010)
Timeline of astronomical maps, catalogs, and surveysMid List1 April 2009References needed (April 2009)
Timeline of astronomyLow List2 March 2010References needed (March 2010), Update needed (July 2010)
Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structureLow List1 April 2009References needed (April 2009)
Timeline of knowledge about the interstellar and intergalactic mediumMid List1 December 2009References needed (December 2009)
Timeline of solar astronomyMid List1 December 2009Sources lacking (December 2009)
Timeline of stellar astronomyMid List1 July 2012References needed (July 2012)
Timeline of telescope technologyNA List2 October 2007Unsourced statements (October 2007, May 2010)
Timeline of telescopes, observatories, and observing technologyMid List2 May 2010Unsourced statements (May 2010, June 2015)
Timeline of the far futureLow FL1 October 2016Failed verification (October 2016)
Timeline of the formation of the UniverseHigh C3 May 2016Split needed (May 2016), References needed (October 2016), Unsourced statements (May 2017)
TimocharisLow Start1 September 2009Unsourced statements (September 2009)
Timothy B. SpahrLow Stub1 July 2016Unsourced statements (July 2016)
Tisserand's criterionMid Start1 December 2009Sources lacking (December 2009)
Titan Winged AerobotMid Stub1 July 2016Orphaned (July 2016)
Tobias MayerUnknown Start1 February 2014In-text citations lacking (February 2014)
Todd J. HenryLow Stub1 May 2015Orphaned (May 2015)
Tolman surface brightness testMid Start1 March 2009Weasel-worded phrases (March 2009)
Tololo 1247-232Unknown Start1 Citation with accessdate and no URL
Tom BolesLow Start1 October 2016Unsourced statements (October 2016)
Tom GehrelsMid Start1 December 2016Unsourced statements (December 2016)
Tom Quinn (astrophysicist)Low Start2 May 2017Orphaned (May 2017), Notability unclear (May 2017)
Tom Van FlandernMid Start4 September 2010Unsourced statements (September 2010, August 2017), External link cleanup (January 2014), Spam cleanup (January 2014)
Tommaso PerelliUnknown Stub1 June 2016Orphaned (June 2016)
Tortugas Mountain ObservatoryLow Start1 June 2011Potentially dated statements (June 2011)
Toru KobayashiUnknown Stub1 January 2011BLP articles lacking sources (January 2011)
Toulouse ObservatoryLow Stub2 January 2016Unsourced statements (January 2016), Dead external links (March 2017)
Trans-Neptunian objectMid B2 November 2016Potentially dated statements (November 2016, February 2017)
Trans-Neptunian objects in fictionLow Stub3 July 2010References needed (May 2012), Expansion needed (July 2010), Reliable references lacking (May 2012)
Transit (astronomy)Low Start2 December 2016References needed (December 2016), Unsourced statements (June 2017)
Transit of minor planetsLow Start1 March 2012In-text citations lacking (March 2012)
TriangulumMid FA1 February 2017Clarification needed (February 2017)
Triangulum Australe in Chinese astronomyUnknown Stub1 May 2015Orphaned (May 2015)
Triangulum in Chinese astronomyUnknown Stub1 May 2015Orphaned (May 2015)
Triquetrum (astronomy)Low Start1 April 2012Accuracy disputes (April 2012)
TritosLow Start1 August 2017Sources lacking (August 2017)
TropopauseLow Start2 March 2012References needed (March 2012), Unsourced statements (March 2012)
TroposphereLow Start1 Web citation with no URL
True massLow Start1 August 2017Dead external links (August 2017)
Trumpler (lunar crater)Low Start1 August 2017Unsourced statements (August 2017)
Trumpler 10Low Stub1 June 2014Unsourced statements (June 2014)
Trumpler 2Low Stub1 November 2016References needed (November 2016)
Trumpler 3Low Stub1 December 2016References needed (December 2016)
Tucana in Chinese astronomyLow Stub1 May 2015Orphaned (May 2015)
Tunguska eventLow B5 March 2013Unsourced statements (March 2013, November 2014, June 2016), Web citation with no URL, Citation with format and no URL
Type II supernovaHigh GA1 October 2017Failed verification (October 2017)
Tyson MedalBottom Start1 August 2015Unsourced statements (August 2015)
TzolkinexLow Start1 May 2015Orphaned (May 2015)
U GeminorumMid Start1 March 2016References needed (March 2016)
U OrionisMid Start1 August 2016Unsourced statements (August 2016)
U1.11Unknown Start1 September 2016Clarification needed (September 2016)
UDF 2457Low Stub1 April 2017Update needed (April 2017)
UDFy-38135539Low B1 October 2010Potentially dated statements (October 2010)
UGC 12591Low Stub1 April 2017Unsourced statements (April 2017)
UGC 2885Low Stub3 January 2014Orphaned (January 2014), Unsourced statements (January 2017), References needed (July 2017)
UGC 477Unknown Stub1 May 2016Orphaned (May 2016)
UGC 5497Low Stub1 April 2015Orphaned (April 2015)
UGPS J0521+3640Unknown Stub2 January 2017References needed (January 2017), Notability unclear (April 2017)
UKIRT Infrared Deep Sky SurveyLow Start3 March 2009Expert attention needed (March 2009), Too technical (March 2009)
ULAS J1120+0641Mid Start2 June 2011Potentially dated statements (June 2011), Unsourced statements (December 2014)
USNO CCD Astrograph CatalogUnknown Stub2 October 2015References needed (October 2015), In-text citations lacking (October 2015)
UU AurigaeLow Stub2 October 2017References needed (October 2017), Unsourced statements (October 2017)
UY ScutiMid C1 October 2017Unsourced statements (October 2017)
Udaipur Solar ObservatoryLow Start1 July 2015References needed (July 2015)
Ukrainian Optical Facilities for Near-Earth Space Surveillance NetworkUnknown Stub1 March 2014Orphaned (March 2014)
UkrselenaLow Start1 May 2015Wikilinks needed (May 2015)
Ultimate fate of the universeTop C4 July 2007Unsourced statements (July 2007, March 2016, January 2016), Dead external links (November 2015)
Ultra-Fast Flash Observatory PathfinderUnknown Start1 2017DOIs inactive (2017)
Ultra-high-energy cosmic rayHigh C1 September 2011Unsourced statements (September 2011)
Ultraviolet astronomyHigh Start2 Citation with bare URL, Citation lacking title
Ulugh BegMid Start2 November 2009Weasel-worded phrases (November 2009), Unsourced statements (August 2016)
Ulugh Beg ObservatoryLow Start1 May 2010Unsourced statements (May 2010)
Unbarred lenticular galaxyLow Stub1 November 2006Sources lacking (November 2006)
Unbarred spiral galaxyMid Stub2 May 2009References needed (May 2009), Expansion needed (April 2010)
Uncertainty parameterLow Stub6 March 2016Expert attention needed (May 2016, March 2016), Too technical (May 2016), Cleanup needed (March 2016, March 2016)
Uniformity of motiveLow Stub2 December 2009Sources lacking (December 2009), Orphaned (May 2015)
United States Naval ObservatoryMid C1 January 2016Unsourced statements (January 2016)
United States Naval Observatory Flagstaff StationLow C4 November 2013Citation with bare URL, Citation lacking title, URL error, Dead external links (November 2013)
UniverseTop GA1 September 2017Unsourced statements (September 2017)
Universe SandboxLow Start3 December 2014References needed (December 2014), Reliable references lacking (April 2016, August 2017)
Universe TodayBottom Start1 October 2016Potentially dated statements (October 2016)
University of California High-Performance AstroComputing CenterUnknown C2 February 2014Style editing needed (February 2014), Promotional tone (August 2016)
University of Copenhagen Center for Planetary ResearchLow Stub2 May 2015References needed (May 2015), Coordinates needed
Uppsala Southern Schmidt TelescopeUnknown Stub1 April 2013Unsourced statements (April 2013)
Uppsala–DLR Trojan SurveyLow Start1 September 2016Unsourced statements (September 2016)
Upsilon AndromedaeMid GA1 2010Potentially dated statements (2010)
Upsilon Piscis AustriniLow Start1 May 2017Reliable references lacking (May 2017)
Upsilon TauriLow Start1 August 2017Unsourced statements (August 2017)
Ursa (Finland)Low Stub2 August 2009Reliable references lacking (August 2009), References needed (August 2009)
Ursa Major ClusterLow Stub1 June 2017Sources lacking (June 2017)
Ursa Major Moving GroupMid Start2 November 2009References needed (November 2009), Unsourced statements (November 2010)
Ursa MinorTop FA1 April 2017Factual verification needed (April 2017)
Usuda Star DomeUnknown Start1 August 2016References needed (August 2016)
V1054 OphiuchiLow Start2 March 2017Prose needed (March 2017), Cleanup needed (March 2017)
V1191 CygniLow Start1 Citation lacking title
V1280 ScorpiiLow Stub1 April 2017References needed (April 2017)
V1339 AquilaeLow Stub1 August 2017References needed (August 2017)
V343 CarinaeLow Stub1 December 2009Sources lacking (December 2009)
V344 CarinaeLow Stub1 December 2009Sources lacking (December 2009)
V345 CarinaeLow Stub1 December 2009Sources lacking (December 2009)
V357 CarinaeMid Stub1 December 2009References needed (December 2009)
V373 ScutiLow Stub1 April 2017In-text citations lacking (April 2017)
V376 CarinaeLow Stub1 December 2009Sources lacking (December 2009)
V391 PegasiLow Start3 September 2007Unsourced statements (September 2007, February 2014), References needed (February 2014)
V4046 SagittariiLow Stub1 May 2017Unsourced statements (May 2017)
V448 CarinaeLow Stub1 December 2009Sources lacking (December 2009)
V518 CarinaeLow Stub1 September 2012References needed (September 2012)
V520 CarinaeLow Stub1 December 2009Sources lacking (December 2009)
V529 AndromedaeLow Stub1 July 2017References needed (July 2017)
V533 HerculisLow Stub1 March 2017In-text citations lacking (March 2017)
V603 AquilaeMid Start1 October 2015Vague or ambiguous time (October 2015)
V774104Low Start1 August 2017Potentially dated statements (August 2017)
VHS 1256-1257Low Stub3 January 2017Unsourced statements (January 2017), References needed (January 2017), Clarification needed (January 2017)
VIRGOHI21Mid C1 2009Potentially dated statements (2009)
VV CepheiMid Start1 October 2017Unsourced statements (October 2017)
VVV SurveyUnknown Start2 September 2015References needed (September 2015), Orphaned (September 2015)
VW CepheiMid Start1 November 2009References needed (November 2009)
VY Canis MajorisMid C1 October 2017Unsourced statements (October 2017)
VZ ArietisLow Stub1 July 2010In-text citations lacking (July 2010)
Vacuum Tower TelescopeLow Stub2 Citation with bare URL, Citation lacking title
Vainu Bappu ObservatoryUnknown Start1 Citation with accessdate and no URL
Variable starTop C1 February 2013References needed (February 2013)
Variable star designationMid Start1 August 2017References needed (August 2017)
Vatican Advanced Technology TelescopeLow Start1 February 2013In-text citations lacking (February 2013)
Vatican ObservatoryMid Start1 March 2015Unsourced statements (March 2015)
Vaughan–Preston gapLow Stub2 July 2017Orphaned (July 2017), Categories needed (July 2017)
Veil NebulaMid Start1 CS1 errors: external links
Ventspils International Radio Astronomy CentreUnknown Start2 2015Potentially dated statements (2015), Unsourced statements (April 2016)
Vertical circleLow Stub1 December 2009Sources lacking (December 2009)
Very Large TelescopeMid C1 March 2008Potentially dated statements (March 2008)
Very-long-baseline interferometryMid Start3 January 2009References needed (January 2009), Cleanup needed (October 2012), Prose needed (October 2012)
Vesta (spacecraft)Low Start3 May 2012Unsourced statements (May 2012), Vague or ambiguous time (May 2012), Sources lacking (May 2012)
Vibidia (crater)Low Stub1 July 2016Dead external links (July 2016)
Victor AmbartsumianMid C1 January 2014References needed (January 2014)
Victoria MeadowsUnknown Stub1 November 2016Potentially dated statements (November 2016)
VirginidsLow Start1 March 2014Dead external links (March 2014)
Virgo ClusterTop Start1 2004Potentially dated statements (2004)
Virgocentric flowUnknown Stub1 June 2015Orphaned (June 2015)
Virial massLow Stub1 September 2014References needed (September 2014)
Virtual Planetary LaboratoryUnknown Stub1 CS1 errors: missing author or editor
VishākhāLow Start1 July 2015Introduction cleanup (July 2015)
Vixen (telescopes)Low Start1 February 2012References needed (February 2012)
Void galaxyMid Stub1 September 2010Incomplete lists (September 2010)
VolvelleBottom Start2 April 2009In-text citations lacking (April 2009), Unsourced statements (December 2015)
Von Braun (crater)Low Start1 October 2010In-text citations lacking (October 2010)
VortonLow Stub4 October 2009Expert attention needed (October 2009), Too technical (October 2009), Orphaned (June 2015)
Voyager 1Mid GA3 October 2010Potentially dated statements (October 2010, 2013), Unsourced statements (February 2016)
Voyager 2Mid B2 August 2011References needed (August 2011), Dead external links (September 2017)
Voyager programMid B2 2013Potentially dated statements (2017, 2013)
Vulcan PlanumUnknown Stub1 December 2016References needed (December 2016)
VulcanoidLow GA1 August 2015Update needed (August 2015)
Vulpecula OB1Low Stub2 June 2016Expansion needed (June 2016), Sources lacking (July 2016)
W43ALow Stub1 April 2017In-text citations lacking (April 2017)
W50 (nebula)Mid Stub1 September 2009Reference cleanup (September 2009)
WASP-85 AbLow Stub1 July 2016Orphaned (July 2016)
WISE 0855−0714Low C1 2014Potentially dated statements (2014)
WISE J031624.35+430709.1Unknown Stub1 May 2015Orphaned (May 2015)
WISE J1147-2040Unknown Stub2 January 2017Vague or ambiguous time (January 2017), Unsourced statements (March 2017)
WISEA 1101+5400Low Stub2 June 2017References needed (June 2017), Notability unclear (June 2017)
WISEP J190648.47+401106.8Unknown Stub1 December 2015Orphaned (December 2015)
WISEPA J195246.66+724000.8Low Stub1 May 2015Orphaned (May 2015)
WIYN ObservatoryLow Start1 January 2017Sources lacking (January 2017)
WR 25Low Start1 January 2017Unsourced statements (January 2017)
WW AurigaeLow Stub1 May 2017Sources lacking (May 2017)
WZ CassiopeiaeLow Stub2 September 2016References needed (September 2016), Unsourced statements (August 2017)
Wallace L. W. SargentUnknown Stub1 August 2015Unsourced statements (August 2015)
Walter LewinMid Start8 December 2014Unsourced statements (February 2015), Citation with bare URL, Citation lacking title, Clarification needed (December 2014), Cleanup needed (December 2014), List cleanup (December 2014), Potentially dated statements (April 2015), BLP articles lacking sources (February 2015)
Wandlebury EnigmaLow Start4 September 2012References needed (September 2012), Original research (September 2012), Citation with accessdate and no URL, Failed verification (September 2012)
Wang SichaoMid Stub1 June 2015Orphaned (June 2015)
Warkworth 2 dishLow Start1 Coordinates needed
Warkworth Radio Astronomical ObservatoryLow Stub1 January 2011References needed (January 2011)
Warkworth Radio TelescopeLow Start3 January 2011References needed (January 2011), Cleanup needed (January 2011, January 2011)
Warrick CouchUnknown C2 September 2014Potentially dated statements (September 2014, February 2015)
Water Lily NebulaLow Start1 Citation with accessdate and no URL
Weakly interacting massive particlesMid C2 January 2011References needed (January 2011), Clarification needed (March 2015)
Weber (crater)Low Start1 July 2011In-text citations lacking (July 2011)
Westerhout 31Low Start1 Reference errors
Westerhout 40Mid C1 CS1 errors: external links
Westerhout 49Low Stub2 March 2009In-text citations lacking (March 2009), Unsourced statements (February 2013)
Westerhout 5Unknown Stub1 February 2009Unsourced statements (February 2009)
Westerlund 1-26Mid C1 October 2017Unsourced statements (October 2017)
Westerlund telescopeUnknown Start2 September 2017Cleanup needed (September 2017), Prose needed (September 2017)
Whirlpool GalaxyHigh B3 June 2011Unsourced statements (June 2011), References needed (October 2013), Potentially dated statements (February 2016)
White holeLow Start3 October 2012Unsourced statements (September 2015), Clarification needed (October 2012, April 2013)
Wick HaxtonMid Start1 August 2010In-text citations lacking (August 2010)
Wiechert (crater)Low Start1 August 2014In-text citations lacking (August 2014)
Wilder ObservatoryLow Start1 January 2012Unsourced statements (January 2012)
Wilhelm BeerMid Start1 September 2014References needed (September 2014)
Wilkinson Microwave Anisotropy ProbeMid B2 December 2012Unsourced statements (January 2013), Update needed (December 2012)
Will HayUnknown C2 December 2013Unsourced statements (December 2013, June 2017)
Willebrord SnelliusUnknown Start1 December 2016Original research (December 2016)
Willem Hendrik van den BosMid Stub1 November 2015Unsourced statements (November 2015)
William Cranch BondMid Start1 December 2015Unsourced statements (December 2015)
William Henry PickeringUnknown Start1 January 2013Unsourced statements (January 2013)
William Henry SmythUnknown C1 May 2015Unsourced statements (May 2015)
William HerschelHigh C1 August 2017References needed (August 2017)
William Herschel TelescopeHigh GA1 2010Potentially dated statements (2010)
William Kenneth HartmannUnknown Start2 November 2016Weasel-worded phrases (November 2016), Unsourced statements (November 2016)
William LaxLow GA1 Citation with accessdate and no URL
William Parsons, 3rd Earl of RosseHigh Start1 April 2015References needed (April 2015)
William Rowan HamiltonLow B1 April 2013References needed (April 2013)
William Stephen JacobUnknown Start1 March 2017Links needing disambiguation (March 2017)
William of Saint-CloudLow Start1 June 2015Orphaned (June 2015)
Williamina FlemingMid Start1 August 2017Potentially dated statements (August 2017)
Wilson–Bappu effectMid Start