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Olaf Hassel Olaf Hassel (12 May 1898 – 22 August 1972) was a Norwegian amateur astronomer. He was born in Øvre Sandsvær. He is known for his discoveries of the comet Jurlov-Achmarof-Hassel in April 1939 and the nova V446 Herculis on 7 March 1960. Hassel was born deaf. ==References==
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「Olaf Hassel」の詳細全文を読む
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