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Unformatted text preview: accounted for retrograde motion-Wrote first text on astronomy The Amalgamest-His model stood for almost 1,500 years Copernicus (1500 AD) first to put forth heliocentric model (based on logic instead of arguments)-Wrote On the Revolutions of the Heavenly Spheres OR The Revolution 1) 2) Stars are very far away from the Sun with respect to the planets 3) Daily motion of stars/sun could be Earths rotation about its axis every 24 hours 4) Explained suns path through zodiac by Earths yearly orbit about the Sun 5) Retrograde motion explained by planets differing orbital distances and speeds to the sun...
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- Spring '09