From 1952, he has worked as a scientist at the Tartu Observatory (1977–1998) Head of the Department of Cosmology; in 1992-1995, he was Professor of Cosmology at the University of Tartu.
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Born in Tartu, he attended the University of Tartu, where he received the Ph.D. equivalent in 1955 and a senior research doctorate in 1972.
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Vera Rubin - her discovery of "flat rotation curves" is the most direct and robust evidence of dark matter.
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