2. Earth Center Greeks Noticed that dots in sky moved Called them planets (wanderer) Romans Gave these wanderers names of Gods (current names) Ptolemy’s Model Earth as center (Geocentric) Accepted for 1,500 years (good approximation)
3. Sun at Center Heliocentric Copernican (1543) Not accepted easily Tycho Brahe (1580) Orbits could not be circular Kepler (1601) Orbits are Ellipse (Matched observations perfectly) Galileo (1610) Used telescope to show moons circle other planets Church reacted violently to his work