Editing Deferent and epicycle (section)

==External links==
{{Commons category|Epicycle}}
*[http://galileo.rice.edu/sci/theories/ptolemaic_system.html Ptolemaic System] – at Rice University's Galileo Project
*[https://www.mathpages.com/home/kmath639/kmath639.htm Eccentrics, Deferents, Epicycles, and Equants] at MathPages

===Animated illustrations===
*[https://www.foothill.fhda.edu/astronomy/astrosims/ptolemaic-system/ Ptolemaic System Simulator], interactive, Foothill College.
*[https://demonstrations.wolfram.com/OrbitsWithEpicyclesOnADeferent/ Orbits with Epicycles on a Deferent], interactive, Wolfram Demonstrations.
*[https://www.khanacademy.org/computer-programming/animate-epicycles/4520289299857408 ANIMATE: Epicycles], interactive JavaScript coding example, Khan Academy.
*[https://www.youtube.com/watch?v=QVuU2YCwHjw Ptolemy and Homer (Simpson)] Reconstruction of a planet's bizarre orbit with Ptolemy's system of epicycles and deferents.

{{Ancient Greek astronomy}}

[[Category:Ancient Greek astronomy]]

[[pl:Deferent]]