How did Aristotle and Copernicus explain the retrograde motion of the planets?

Under their different ideas of how the solar system was setup, how did Aristotle and Copernicus explain the retrograde motion of the planets in the sky?How did Aristotle and Copernicus explain the retrograde motion of the planets?Aristotle believed in the geocentric model of the Universe. In this model, retrograde motion was explained by epicycles. Look at Wikipedia to see what they are:



http://en.wikipedia.org/wiki/Epicycles



Copernicus was a supporter of the heliocentric model of the Universe. In this model, retrograde motion resulted naturally from the fact that all the planets, including Earth, rotated around the Sun. It was essentially just a curious side-effect.How did Aristotle and Copernicus explain the retrograde motion of the planets?You know. I almost wish we could forget about Aristotles thoughts about astronomy because he was completely wrong. Being wrong about an idea is ok but the church completely adopted Artistotles ideas about the geocentric universe and the moon is made of glass and in the last....ummm....1900 years the church will burn, torture, and kill you if you have any other ideas.



Now his Ideas on Logic and Reasoning where much different but it is hard for anyone to figure out astronomy without technology.



You know, Noone really knows how or why Copernicus thought the Sun was the center. Plus there was someone from the Greek (B.C) days who posed a Heliocentric universe.... think his name was Archumis or Arch(something)......