How was Aristotle’s model similar to Ptolemy’s model?

Both models stated that the planets rotate on their axes.
Both models stated that Earth is the center of the system around which other objects orbit.
Both models stated that the planets and objects in the solar system have small orbits called epicycles.
Both models stated that the Sun is the center of the system around which objects have elliptical orbits.

1 answer

Both Aristotle’s model and Ptolemy’s model stated that Earth is the center of the system around which other objects orbit. This geocentric view was central to both philosophers' cosmological frameworks, with Aristotle proposing a spherical Earth at the center and Ptolemy elaborating on this with his complex system of deferents and epicycles to explain the apparent retrograde motion of the planets.