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NGC 4517 is a spiral galaxy located approximately 40 million light-years away in the constellation of Virgo. It was discovered in 1784 by William Herschel.〔 == 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「NGC 4517」の詳細全文を読む スポンサード リンク
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