German-born theoretical physicist Albert Einstein writes out an equation for the density of the Milky Way on the blackboard at the Carnegie Institute, Mt. Wilson Observatory headquarters in Pasadena, CA, January 14, 1931
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German-born theoretical physicist Albert Einstein and his wife Elsa Einstein, on the Red Star Ocean Liner S.S. Belganland, 1930
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German-born theoretical physicist Albert Einstein, circa 1935
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German-born theoretical physicist Albert Einstein and his wife Elsa Einstein, on the Red Star Ocean Liner S.S. Belganland, 1930
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German-born theoretical physicist Albert Einstein and his wife Elsa, circa 1931
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German-born theoretical physicist Albert Einstein, visiting Mount Wilson Observatory, in California. Also present are astronomers Edwin Hubble, back, second from left, Walter Sydney Adams, centre, in hat) and William Wallace Campbell, far right, circa 1931
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German-born theoretical physicist Albert Einstein, circa 1929
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German-born theoretical physicist Albert Einstein, circa 1929
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German-born theoretical physicist Albert Einstein, with his wife Elsa and stepdaughter Margot, at their home in Berlin, circa 1929
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German-born theoretical physicist Albert Einstein, circa 1941
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German-born theoretical physicist Albert Einstein with his son Hans Albert, left, and grandson Bernhard, circa 1932
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German-born theoretical physicist Albert Einstein, circa 1925
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German-born theoretical physicist Albert Einstein, circa 1925
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German-born theoretical physicist Albert Einstein, circa 1925
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