•Nicolaus Copernicus 1473 - 1543 Heliocentric
model
Explanation of retrograde motion
•
•Tycho Brahe 1546
- 1601 Observations of
changes in sky
Accurate planet positions
•
•Johannes Kepler
1571 – 1630 Mathematical
description of
planetary orbits
•Galileo Galilei
1564 – 1642 Observations
using telescope
supporting Copernican model
•
•Isaac Newton 1642
– 1727 Physics to explain
Kepler’s orbits