Question

What was Aristotle's theory of the universe?

Answer 1

In Aristotle world the earth is composed of four elements: Earth, Water, Fire and Air. It is at the center and it does not revolve around anything else or rotate around its own axis. It is surrounded by ten concentric spheres made of a perfectly transparent substance known as "quintessence." These spheres revolve around the earth, carrying the other celestial bodies:
1) Moon
2) Mercury
3) Venus
4) Sun
5) Mars,
6) Jupiter
7) Saturn ("Saturni")
8, 9, 10 "Fixed Stars" `=>`These are the twelve astrological constellations, Gemini, Ares, etc.)
11) Beyond "The Kingdom of Heaven"