Definition:Epicycle (Ptolemaic Astronomy)

Definition
An epicycle is the orbit described by a body moving in a uniform circular motion around a point which is itself moving in a uniform circular motion around another point.


 * Epicycle.png

That point may itself also be moving in a uniform circular motion around yet another point.

Also see

 * Definition:Epicycle of Epicycloid
 * Definition:Epicycle of Hypocycloid