Which is a correct statement about Aristotle's and Ptolemy's models of the solar system?

Question

(1 point)
Ptolemy's model involved epicycles moving along perfect circles
Aristotle's model involved epicycles moving within crystalline spheres.
Ptolemy's model was never useful because it was incorrect.
Aristotle's model put the Sun at the center

Answer 1

The correct statement about Aristotle's and Ptolemy's models of the solar system is:

Ptolemy's model involved epicycles moving along perfect circles.

Ptolemy's geocentric model explained the movements of the planets using a system of deferents and epicycles, where planets moved in small circles (epicycles) that were themselves moving along larger circles (deferents).

Aristotle's model also placed the Earth at the center, and while he did propose a system of crystalline spheres for the heavens, he did not incorporate epicycles in the way Ptolemy did.