In Ptolemy s view of the universe, a planet moves on an epicycle whose center moves around the Earth on the deferent circle.
A) Correct
B) FALSE; Ptolemy put the Sun at the center.
C) FALSE; The planet stays on the deferent circle.
D) FALSE; The Earth is at the center of the epicycle.
E) FALSE; Both c and d are correct.

Question

Quizplus · Accepted Answer

Ptolemy's model of the universe had the Earth at the center and the planets moving on epicycles, which had their centers moving on deferent circles around the Earth. This is the correct description of Ptolemy's geocentric model, where each planet moves on an epicycle (a small circle) whose center moves along the deferent circle (a larger circle) around the Earth at the center.

In Ptolemy S View of the Universe, a Planet Moves