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Period: 300 BCE to
My Top 10 Space Moments
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200 BCE
Aristarchus proposes a heliocentric (Sun-centered) model of the universe
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1520
Ferdinand Magellan observes Magellanic clouds, which are galaxies
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1543
Nicholas Copernicus publishes a paper that represents the heliocentric model
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Giordano Bruno is burnt at the stake for promoting the heliocentric model
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Kepler publishes Astronomia Nova, explaining the motion of the planets
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Galileo publishes his Dialogue on Two World Systems, which argues for the heliocentric model
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Issac Newton publishes Principia Mathematica in which explains the law of universal gravity
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William Herschel discovers Uranus
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John Couch Adams discovers Neptune
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Georges Lemaitre proposes the Big Bang Theory
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Edwin Hubble discovers evidence of an expanding universe