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Einstein published his fabled "Annus Mirablills" in which he published four ground breaking papers on topics that included special relativity.
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Einstein revolutionized physics when he announced the Theory of General Relativity that explained gravitational attraction as the result of massive objects warping all near by space-time.
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Einstein used general relativity ti predict existence of gravitational waves, ripples, in space space-time when massive bodies interact.
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In 1917 Einstein introduced a new term to his equation known as the cosmological constant.
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in 1919 Arthur Eddington observed the sun mass being light during a eclipse that was the gravitational lensing effect assumed by Einstein.
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A solar eclipse confirmed a strange relativity prediction which was that a massive body can redirect the path of traveling starlight
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Alexander Friedmann and Georges Lemaitre independently found a solution to Einstein's equation about the uniformly expanding universe.
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In 1970 Vera Rubin provided very convincing evidence that most galaxies contained dark matters, which was causing them to rotate faster.
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in 1974 Steph Hawking showed that theoretically that quantum effects can cause black holes evaporate.
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In 1974 both men discovered a pair of neutron stars whose orbit seemed to slow up as if they were losing energy by omitting gravitational forces.