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Key terms: sun year bc samos moon aristarchus value times greek ca sizes ancient earth lunar degree solar century distances thus away plus ptolemy diameter parallax astronomer angle stars correct almost precession seconds archimedes geocentric great year possibly relative sidereal universe accuracy astronomy babylonian heliocentric model per century sun and moon ancient greek length of the month sizes and distances Search external links cited by footnotes on Wikipedia page Aristarchus of Samos: |
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