Question

The idea of epicycles was introduced by which astronomer as an attempt to explain the retrograde motion of the planets in the geocentric universe model?
A. Brahe
B. Galileo
C. Ptolemy
D. Copernicus

Answer 1

Hi again

The answer is : Ptolemy

Answer 2

It's C; Ptolemy introduced epicycles into his model because he wanted to explain the retrograde motion of the planets.