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Jakob Bartsch or Jacobus Bartschius (c. 1600 – 26 December 1633) was a German astronomer. ==Biography== Bartsch was born in Lauban (Lubań) in Lusatia. He was taught how to use the astrolabe by Sarcephalus (Christopher Hauptfleisch), a librarian in Breslau (Wrocław). He also studied astronomy and medicine at the University of Strassburg (Strasbourg).〔Ioan James. ''Remarkable Physicists: From Galileo to Yukawa''. Cambridge University Press, 2004. ISBN 0-521-01706-8〕 In 1624 Bartsch published a book titled ''Usus astronomicus planisphaerii stellati'' containing star charts that depicted six new constellations introduced around 1613 by Petrus Plancius on a celestial globe published by Pieter van den Keere. These six new constellations were Camelopardalis, Gallus, Jordanis, Monoceros (which he called Unicornu), Tigris and Vespa. He also mentioned but did not depict Rhombus, a separate invention by Isaac Habrecht II. Bartsch was often wrongly credited with having invented these figures. Only Camelopardalis and Monoceros survive today.〔(Jacob Bartsch and seven new constellations – Ian Ridpath's ''Star Tales'' )〕 Bartsch married Johannes Kepler's daughter Susanna on 12 March 1630〔James A. Connor. ''Kepler's Witch''. HarperCollins, 2004. ISBN 0-06-052255-0〕 and helped Kepler with his calculations.〔''Christian Pamphlets''. Protestant Episcopal Society for the Promotion of Evangelical Knowledge. 1852.〕 After Kepler's death in 1630, Bartsch edited Kepler's posthumous work ''Somnium''. He also helped gather money from Kepler's estate for his widow.〔 Bartsch died in Lauban in 1633. 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「Jakob Bartsch」の詳細全文を読む スポンサード リンク
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