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Ptolemy proposes the Geocentric Model/Theory
Ptolemy proposes a theory/model that the Earth is in the center and that the sun, moon, planets and stars revolve around it, adding his discovery that they orbit in epicycles. -
May 24, 1543
Nicolaus Copernicus publishes On The Revolutions of Heavenly Spheres
A book explaining that the planets orbit around the Sun and not the Earth, and that Earth is one of the orbiting planets. (Book supporting his idea of the heliocentric system). -
Johannes Kepler published his Laws of Planetary Motion
Johannes Kepler published his three laws that he discovered about planetary motion.
