-
1473
Nicolaus Copernicus
Sun-Centric Model -
1571
Johannes Kepler
Discovered elliptical orbits -
Tycho Brahe
Made astronomical instruments and fixed the positioning of stars -
Isaac Newton
Theory of universal gravity -
Pierre-Simon Laplace
Applied Sir Isaac Newton’s theory of gravitation to the solar system -
William Herschel
Discovered a planet and moons -
Harlow Shapley
Estimated the size of the milky way and sun -
Percival Lowell
Discovered Pluto and Mars -
Henrietta Leavitt
Period-luminosity relationship for Cepheid variables -
Albert Einstein
Special and general theories of relativity -
Edwin Hubble
Galaxies exist beyond the milky way -
Willem De Sitter
Developed theoretical models of the universe -
Georges Lemaître
Discovered the Big Bang Theory -
Fred Hoyle
Formulated the theory of stellar nucleosynthesis -
Arno Penzias and Robert Wilson
Discovered cosmic microwave background radiation