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Karl Hermann Struve (October 3, 1854 – August 12, 1920) was a Russian astronomer. In Russian, his name is sometimes given as ''German Ottovich Struve'' (Герман Оттович Струве) or ''German Ottonovich Struve'' (Герман Оттонович Струве). Herman Struve was a part of the famous group of astronomers from the Struve family, which also included his grandfather Friedrich Georg Wilhelm von Struve, father Otto Wilhelm von Struve, brother Ludwig Struve and nephew Otto Struve. Unlike other astronomers of the Struve family, Herman spent most of his career in Germany. Continuing the family tradition, Struve's research was focused on determining the positions of stellar objects. He was particularly known for his work on satellites of planets of the Solar System and development of the intersatellite method of correcting their orbital position. The mathematical Struve function is named after him. ==Biography== Herman was born in 1854 in Tsarskoye Selo, a former Russian residence of the imperial family and visiting nobility, located south from the center of St. Petersburg. He attended gymnasium in Vyborg and in 1872 entered the Tartu University (Tartu was known then as Dorpat). While studying there, in 1874–1875, Struve participated in an expedition to observe transit of Venus through the disk of the Sun. That observation was carried out at Port Poisset on the Asiatic East Coast. After graduation in 1877, he became a member of the Pulkovo Observatory and was sent abroad for two-year post-graduate studies. Accompanied by his cousin's husband, Struve stayed in several cities, including Strasbourg, Paris, Milan, Graz and Berlin, learning from such celebrities as Helmholtz, Kirchhoff, Boltzmann and Weierstrass. After returning to Russia, he joined the staff of Pulkovo Observatory, studying the satellites of Saturn among other things.〔 In 1881, Struve obtained his master's degree at the University of Tartu, with the highest honors, and in 1882 defended a PhD thesis at Saint Petersburg University (Pulkovo had no associated educational institutions). Both works were in the field of optics, in particular, the master thesis was titled "On Fresnel interference phenomenon – theoretical and experimental work" – according to Struve himself, despite the family traditions, he did not intend then to become an astronomer. Later, however, he became excited with his father's project of building a 30-inch telescope at Pulkovo, with its fantastic new possibilities for observation. Struve made extensive use of this telescope in his work. In 1883, he was appointed adjunct astronomer at Pulkovo Observatory.〔 (contains a photo of Wilfried)〕 By then, the Struve family was highly respected in Russia and Tsar Alexander III had a strong wish for Hermann to succeed his father Otto as the director of the Pulkovo Observatory. However, Hermann politely declined the offer, mentioning that he was in the middle of crucial observations of Saturn which would be interrupted by administrative tasks. In 1890, Struve was appointed as the senior astronomer at Pulkovo with the clear understanding that he should become director after completing his Saturn work. However, the death of Alexander III in 1894 freed Struve from this task. Pro-Russian views were gradually developing in Russian society, including science, and foreigners felt progressively more alienated. Therefore, when in 1895 Struve was offered the position of professor at Königsberg University, he gladly accepted and moved his family to Germany.〔 There, he succeeded W. Foerster as director of Königsberg Observatory. Struve was also called for the task of rescuing the Berlin Observatory. It was then located in the center of Berlin where astronomy observations were not practical and rents were too high, and discussions of its relocation stalled. Struve managed to sell the old observatory site so profitably that he could build a new observatory from scratch. The location was chosen at Neubabelsberg, near Potsdam and from the center of Berlin, and the new institution was named Berlin-Babelsberg Observatory. There, he started installing a 26-inch Zeiss refractor and a 48-inch reflector, which would then become the largest telescope in Germany. While he did not get to operate them himself due to delays caused by World War I, the refractor was much used by his son Georg, and the reflector by his lesser-known grandson Wilfried.〔 In 1905, Struve became professor of the University of Berlin and from 1904 until his death in 1920, he served as director of the Berlin-Babelsberg Observatory.〔〔(Struve family ) (in Russian)〕 Struve's death was accelerated by a heart illness which he suffered from during his late years and by a bad fall from a tram car in 1919. He broke a thigh, and while recovering in a sanatorium in Bad Herrenalb, died of a heart attack.〔 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「Hermann Struve」の詳細全文を読む スポンサード リンク
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