In Ptolemy's geocentric theory of the solar system, what name is given to the small circle around which the planet moves while the center of this circle orbits Earth?
A) epicycle
B) ecliptic
C) deferent
D) celestial equator

Question

Quizplus · Accepted Answer

The term "epicycle" refers to the small circle on which a planet moves according to Ptolemy's geocentric model, while the center of this circle (the epicycle) moves along a larger circle called the deferent, which orbits Earth.

In Ptolemy's Geocentric Theory of the Solar System, What Name