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Dr Robert A. Hatch - University of Florida
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| The heliocentric (sun-centered) diagram below, drawn by the author, is rather more complex than the standard illustration usually taken from Copernicus' De revolutionibus. Several points worthy of notice include the 'bi-epicyclic' model used for the Moon, and perhaps second, to note that there are several different centers of motion, a different center for each planet. Technically, the Sun is not at the 'center' of Copernicus model. Each planet had its own center of motion, which was neither a geometric nor a physical center of rotation (rotation of the line, revolution of the planet). For further details about Copernicus' system, see the clicks below, which focus on Copernicus' models for the superior and inferior planets, and Earth-Sun and Earth-Moon relations. |
| Diagrams of the Earth & Superior Planets |
| Diagrams of the Earth & Inferior Planets |
| Diagrams of the Earth - Sun Relation |
| Diagrams of the Earth - Moon Relation |
rah.jan.99
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Copyright 1998 - Dr Robert A. Hatch - All Rights Reserved