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Ptolemy Tycho Brahe Copernicus Johannes Kepler
Galileo Edwin Hubble Isaac Newton
Ptolemy TychoBrahe
Copernicus Johannes Kepler
Galileo Edwin Hubble
IsaacNewton
Earth is at the center of the universe
Other planets and the sun revolve around the Earth
Sun and moon revolve around the Earth (Earth-centered)
Other planets revolve around sun while sun revolves around Earth
Believed in a Sun centered universe
Believed all planets orbit the Sun
Believed all planets revolve around the Sun in elliptical orbits
3 laws of planetary motion
Used a telescope to observe objects in space
Other galaxies exist beyond the edge of the Milky Way.
The universe is larger than our galaxy!
The Laws of Gravity
All the planets orbit the most massive object in the solar system