Copernicus
A) was the first person to propose that the earth orbited the sun
B) showed how retrograde motion could be explained without epicycles if the planets all orbited the sun
C) showed how retrograde motion could be explained without epicycles if the planets all orbited the earth
D) first used the telescope for astronomical purposes

Question

Quizplus · Accepted Answer

Copernicus proposed the heliocentric model, where planets, including Earth, orbit the Sun, explaining retrograde motion without the need for epicycles.