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NGC 4639 is a barred spiral galaxy located in the constellation Virgo. It lies over 70 million light-years away from planet Earth. Its core contains a massive black hole. ==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 4639」の詳細全文を読む スポンサード リンク
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