星系群(group of galaxies)和 星系团 ( cluster of galaxies )是同级天体系统，通常把成员数不超过100个的称为星系群，更多的为 星系团 。
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The winner is a group of galaxies called Arp 274.
获奖的是被称为Arp 274的一个星系群。
One progenitor hypothesis is that NGC 1132 is the result of a series of galaxy mergers in what once was a small group of galaxies.
有一个假设认为NGC 1132是由一个小星系群进行一系列星系融合之后的产物。
A new look at Stephan's Quintet, a compact group of galaxies discovered about 130 years ago and located 280 million light years from Earth.
史蒂芬五重奏的新样子，这是一个大约130年前坐落在距离地球2亿8千万光年远的星系的组合。
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