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Apr 29, 1543
Theory of the Universe
Copernicus publishes his heliocentric theory of the Universe -
Period: Apr 29, 1543 to
History of Astronomy
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Apr 29, 1572
Supernova
Tycho Brahe discovers a supernova in the constellation of Cassiopeia -
Discovery of the Milky Way
Galileo uses telecope for astronomical reasons and discorvers 4 Jovian moons, the Moon's craters, and the Milky Way Galaxy -
Beginning of Star Analysis
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Hubble discovers More Galaxies beyond Milky Way
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Explorer 1 launched
First satellite to orbit earth is launched -
Armstrong and Aldrin walk the Moon
Apollo 11 lands on the moon -
Challenger Disaster
Space shuttle, Challenger, explodes after launch -
Mars Pathfinder
The mars pathfinder lands on Mars -
Water on Mars
Evidence of water is found on Mars