View Full Version : Three Cheers For Epicyles?
2nd July 2006, 11:35 AM
2nd July 2006, 02:40 PM
A green velvet robe with a white fur collar. Ohmygod, Copernicus is the Ghost of Christmas Present!
2nd July 2006, 03:44 PM
Myth: The Copernican system was simpler than the Ptolemaic system. Some things were clearly simpler, but he actually used more epicycles! The Prutenic Tables were not better than the Alfonsine tables.
Sort of. The Copernican epicycles were his way of accounting for elliptical motion rather than using equant points (think Spirograph motion) which were confusing. Both were way off in their predicitions (but in different places) and both had epicycles, but the Copernican model used simpler uniform motion. Had Copernicus worked after Descartes he might have developed a more accurate system than Ptolemy. Kepler had the advantage of ellipses.
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