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Period: 1500 to
Cosmology
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1543
Nicolaus Copernicus
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Tycho Brahe
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Johannes Kepler
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Issac newton
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Pierre-simon Laplace
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William Herschel
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Percival Lowell
Founded Lowell Observatory in Flagstaff which led to the discovery of Pluto -
Henrietta Leavitt
2,400 variable stars between 1907 and 1921 -
Willem de Sitter
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Albert Einstein
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Harlow Shapley
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Georges Lemaître
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Edwin Hubble
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Fred Hoyle
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Arno Penzias and Robert Wilson
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Arno Penzias and Robert Wilson