Aristotle

Aristotle thought that the earth was stationary and that the sun the moon the planets and that the sun,the moon ,the planets and the stars moved in circular orbits about the earth.Thisidea was elaboarted by ptolemy in the second century AD in to a complete cosmological model.The earth stood at the center surrounded by eight sphares that carried the moon the sun the stars, and the five planets known at the time.Mercury venus ,Mars,Jupiter and saturm.The planets thenselves moved on smaller circles attached to their respective sphares in order to account for their rather complicated observed paths in the sky.The outermost sphare carried the so-called fixed stars,which always stay in the positions relative to each other but which rotate together accross the sky.What lay beyond the last sphere was never made very clear,but it certainly was not part of mankinds observe universe.