-
Nicolaus Copernicus was a Polish astronomer who did the theory that the Sun is at rest near the center of the Earth
-
Ptolemy believed that the heavenly bodies' circular motions were caused by their being attached to unseen revolving solid spheres
-
Galileo's observations strengthened his belief in Copernicus' theory that Earth and all other planets revolve around the Sun.
-
Johannes Kepler was a German astronomer who discovered three major laws of planetary motion
