Watchers of the celstial bodies
The Greeks and their relation to astronomy
The Greeks contribution to Astronomy
Since this failed to ultimately decide how the universe as a whole functioned, they then turned to more options, next came Aristarchus, who proposed that THE SUN, NOT THE EARTH, was the center of our universe, and on Earth, we spun on an axis. While this was actually correct, ancient Astronomers could pick up what he was putting down, so they rejected his ideas.
A little while of a century later, The astronomer Hipparchus, believed that the suns moons and stars moved in circular movements, or orbits, and because our Earth is not exactly at the center, and that in fact, the nearby celestial bodies moved in complicated patterns.