-
276 BCE
eratosthenes
sieve of erathosthenes -
160
claudius ptolemy
geocentric model -
1473
nicholaus copernicus
heliocentrism -
Dec 14, 1546
tycho brahe
tychonic system -
1571
johannes kepler
kelpers law of planetary motion -
sir issac newton
law of gravity -
albert einstein
theory of relativity