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| View Original: | Ptolemaic elements.svg (167x167) | |||
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| Keywords: Ptolemaic elements.svg A simple illustration showing the basic elements of Ptolemaic astronomy It shows a planet rotating on an epicycle which is itself rotating around a deferent inside a crystalline sphere The center of the system is marked with an X and the earth is slightly off of the center Opposite the earth is the equant point which is what the planetary deferent would actually rotate around Distances have been exaggerated as has the simplicity for the purposes of illustration Created by User Fastfission in Adobe Illustrator Fastfission If you want to credit someone credit Wikimedia Commons Otherwise don't credit anyone that's fine by me --Fastfission 15 02 14 April 2008 UTC Medieval astronomy Geocentric model Orbits Epicycle | ||||
