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Heber Doust Curtis (June 27, 1872 – January 9, 1942 ) was an American astronomer. He served as director of the Allegheny Observatory. He is best known as one of the participants in the "Great Debate" of 1920 with Harlow Shapley on the nature of nebulas and galaxies and the size of the universe. Minor planets discovered: 1 (23400) A913 CF February 11, 1913 Links Retrieved from "http://en.wikipedia.org/"
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