What was the reason for using epicycles and deferents to explain the motion of the planets in the night sky?
A)prograde motion
B)Mercury and Venus's limited angular distance from the Sun
C)retrograde motion
D)non-uniform speed of the planets in their orbits

Question

Quizplus · Accepted Answer

The reason for using epicycles and deferents was to explain retrograde motion, which is the apparent motion of a planet in the opposite direction to its usual path across the night sky. These models were used to account for this phenomenon before the development of a heliocentric model of the solar system.

What Was the Reason for Using Epicycles and Deferents to Explain