Original file (SVG file, nominally 168 × 168 pixels, file size: 25 KB)
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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.
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This work has been released into the public domain by its author, Fastfission. This applies worldwide.
In some countries this may not be legally possible; if so: |
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)
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:25, 8 November 2009 | | 168 × 168 (25 KB) | Fastfission~commonswiki | update metadata |
| 16:23, 31 December 2005 |  | 168 × 168 (24 KB) | Fastfission~commonswiki | modify this a bit. remove the little arrows (not necessary, somewhat cheesy), and put the epicycle itself in its own little sphere | |
| 19:42, 30 December 2005 |  | 153 × 153 (28 KB) | Fastfission~commonswiki | ||
| 19:38, 30 December 2005 |  | 153 × 153 (29 KB) | Fastfission~commonswiki | shift the elements around a little | |
| 19:37, 30 December 2005 |  | 153 × 153 (29 KB) | Fastfission~commonswiki | A simple illustration showing the three basic elements of Ptolemaic geometry. It shows a planet rotating on an epicycle which is itself rotating around a deferrent inside a crystalline sphere. The center of the system is marked with an X, and the earth is |
