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NGC 1232
NGC 1232 is an intermediate spiral galaxy about 60 million light-years away〔 in the constellation Eridanus. It is dominated by millions of bright stars and dark dust, in spiral arms rotating about the center. Open clusters containing bright blue stars are sprinkled along these spiral arms, with dark lanes of dense interstellar dust between. Less visible are dim normal stars and interstellar gas, producing such high mass that they dominate the dynamics of the inner galaxy. Not visible is matter of unknown form called dark matter, needed to explain the motions of the visible material in the outer galaxy. NGC 1232 and its satellite are part of the Eridanus cluster of galaxies, along with NGC 1300. == NGC 1232A == NGC 1232A is a satellite galaxy of NGC 1232.〔(【引用サイトリンク】work=Results for NGC 1232A )〕 It is thought to be the cause of unusual bending in the spiral arms. In 1988, NGC 1232A was estimated to be 68 million light-years away〔(【引用サイトリンク】work=NASA/IPAC Extragalactic Database )〕 while NGC 1232 was estimated to be 65 million light-years away.〔
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 1232」の詳細全文を読む
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