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Johann Holetschek : ウィキペディア英語版 | Johann Holetschek Johann Holetschek (August 29, 1846 – November 10, 1923) was an Austrian astronomer, known for his research on comets. Born in Thuma, in Lower Austria, he worked at the observatory of the University of Vienna. He died at Vienna. The crater Holetschek on the Moon is named after him. ==Sources==
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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「Johann Holetschek」の詳細全文を読む
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