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Richard A. Prager (November 30, 1883 – July 20, 1945) was a German-American astronomer. ==Career== Prager was born in Hannover, Germany. He became an assistant in the German Academy of Sciences in 1908. The following year he became head of the ''Observatorio Nacional'' in Santiago, Chile,〔Hentschel, Klaus (ed.) (1996). ''Physics and National Socialism: An Anthology of Primary Sources'', p. 117, fn. 6. Birkhauser. ISBN 3-7643-5312-0.〕 where he remained until 1913. He then returned to Berlin, becoming an observer at the Berlin-Babelsberg Observatory.〔 In 1916 he became a professor. He was an early pioneer of stellar photoelectric photometry. He is noted for his work in the field of variable stars,〔 and he made numerous contributions to ''Astronomische Nachrichten'' on this topic. In 1938 he was imprisoned by the German Nazis. His friends in England obtained his release in 1939, and he moved to the United States where he accepted a position at the Harvard Observatory. However his health had suffered from his imprisonment and from his separation from his family, and he died only six years later. The crater Prager on the Moon is named in his honor. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Richard Prager」の詳細全文を読む スポンサード リンク
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