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ID: 132371
User: 209.106.46.161
Article: Aristarchus of Samos
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m (Reverted edits by 216.56.28.137 to last version by ClueBot NG (GLOO))
(Distance to the Sun (Lunar Dichotomy))
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Using correct [[geometry]], but the insufficiently accurate 87° [[Datum (geodesy)|datum]], Aristarchus concluded that the Sun was between 18 and 20 times farther away than the Moon. (The true value of this angle is close to 89° 50', and the Sun's distance is actually about 400 times the Moon's.) The implicit false solar parallax of slightly under 3° was used by astronomers up to and including [[Tycho Brahe]], ca. AD 1600. Aristarchus pointed out that the Moon and Sun have nearly equal [[angle|apparent angular sizes]] and therefore their diameters must be in proportion to their distances from Earth. He thus concluded that the diameter of the Sun was between 18 and 20 times larger than the diameter of the Moon; which, although wrong, follows logically from his data. It also leads to the conclusion that the Sun's diameter is almost seven times greater than the Earth's; the volume of Aristarchus's Sun would be almost 300 times greater than the Earth.<ref>{{cite book |author=Kragh, Helge |title=Conceptions of cosmos: from myths to the accelerating universe: a history of cosmology |publisher=Oxford University Press |year=2007 |page=26 |isbn=0-19-920916-2}}</ref> This difference in sizes may have inspired the heliocentric model.
 
Using correct [[geometry]], but the insufficiently accurate 87° [[Datum (geodesy)|datum]], Aristarchus concluded that the Sun was between 18 and 20 times farther away than the Moon. (The true value of this angle is close to 89° 50', and the Sun's distance is actually about 400 times the Moon's.) The implicit false solar parallax of slightly under 3° was used by astronomers up to and including [[Tycho Brahe]], ca. AD 1600. Aristarchus pointed out that the Moon and Sun have nearly equal [[angle|apparent angular sizes]] and therefore their diameters must be in proportion to their distances from Earth. He thus concluded that the diameter of the Sun was between 18 and 20 times larger than the diameter of the Moon; which, although wrong, follows logically from his data. It also leads to the conclusion that the Sun's diameter is almost seven times greater than the Earth's; the volume of Aristarchus's Sun would be almost 300 times greater than the Earth.<ref>{{cite book |author=Kragh, Helge |title=Conceptions of cosmos: from myths to the accelerating universe: a history of cosmology |publisher=Oxford University Press |year=2007 |page=26 |isbn=0-19-920916-2}}</ref> This difference in sizes may have inspired the heliocentric model.
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you douche bag you r the weirdest thing ever.
   
 
==The Great Year and an Estimate of the Length of the Month==
 
==The Great Year and an Estimate of the Length of the Month==
Reason: ANN scored at 0.964542
Reporter Information
Reporter: -19 (anonymous)
Date: Saturday, the 4th of June 2016 at 09:42:03 AM
Status: Reported
Saturday, the 4th of June 2016 at 09:42:03 AM #104577
-19 (anonymous)

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