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1543
Nicolaus Copernicus publishes On The Revolutions of Heavenly Spheres
Nicolaus Copernicus was a Polish astronomer who did the theory that the Sun is at rest near the center of the Earth -
Ptolemy proposes the Geocentric Model/Theory
Ptolemy believed that the heavenly bodies' circular motions were caused by their being attached to unseen revolving solid spheres -
Galileo's experiment at the Leaning Tower of Pisa
Galileo's observations strengthened his belief in Copernicus' theory that Earth and all other planets revolve around the Sun. -
Johannes Kepler published his Laws of Planetary Motion
Johannes Kepler was a German astronomer who discovered three major laws of planetary motion
