Image:Ptolemaic elements.svg
From Wikipedia, the free encyclopedia
Ptolemaic_elements.svg (25KB, MIME type: image/svg+xml)
| This is a file from the Wikimedia Commons. The description on its description page there is shown below. |
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.
[edit] Licensing
Use of this work which I have created is allowed under the terms of the CC-BY-SA license (see below). Credit must be given to "Wikimedia Commons." You can contact me if you would like to negotiate other licensing terms (which I am generally happy to do). Those who wish to use this in the course of teaching may do so without any limitations. --Fastfission
   |
This file is licensed under the Creative Commons Attribution ShareAlike 2.5 License |
