Ptolemy tried to describe the motion of the planets by devising a small circle, called a(n) ____, which rotated around the edge of a larger circle.
A) epicycle
B) foci
C) deferent
D) equant
E) sphere

Question

Quizplus · Accepted Answer

Ptolemy used the concept of an epicycle, a small circle whose center moves around the circumference of a larger circle (the deferent), to explain the complex movements of planets in the geocentric model of the universe.

Ptolemy Tried to Describe the Motion of the Planets by Devising