Copernicus
A)proposed that the Earth orbited the Sun.
B)showed how retrograde motion could be explained without epicycles if the planets all orbited the Sun.
C)neither proposed that the Earth orbited the Sun and showed how retrograde motion could be explained without epicycles if the planets all orbited the Sun.
D)both proposed that the Earth orbited the Sun and showed how retrograde motion could be explained without epicycles if the planets all orbited the Sun.

Question

Quizplus · Accepted Answer

Copernicus proposed the heliocentric model where the Earth and the other planets revolve around the Sun. He also showed that retrograde motion could be explained by the relative motion of the Earth and the other planets, rather than the need for epicycles in the geocentric model.