When Did a Planet Undergo Retrograde Motion in Ptolemy's Model

Multiple Choice

When did a planet undergo retrograde motion in Ptolemy's model of the solar system?

A) When the deferent of a planet carried it closest to the Earth
B) When the Earth passed the planet as they both orbited the Sun
C) When the planet was dimmest and most distant
D) When the planet was on the part of its epicycle that was nearest the Earth