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Ptolemy
Ptolemy suggests geocentric theory of the universe -
Dec 28, 1543
heliocentric theory
copernicus publishes his heliocentric theory of the Universe. -
Kepler's Law
Kepler creates his first and secong law -
Speed of light
Ole Romer measures the speed of light. -
Telescope
Hans Lippershey makes the telescope -
Ceres
piazza finds ceres asteroid -
Canals on mars
Schiaparell sees canals on mars -
Red spot
The Great Red Spot on Jupiter becomes prominent. -
Pluto is a planet
Clyde Tombaugh finds pluto -
Astronomy school
Al mamon founds baghdad astronomy school