特徵
NGC 772的直徑約20萬光年,是銀河系的兩倍大小[1],其周圍有若干個衛星星系——包括矮橢圓星系NGC 770——其施加於NGC 772潮汐力很可能導致了後者發展出了一條非常長的外螺旋臂。
參考資料
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