天文学家一般认为球状星团(globular star clusters)是由单一云气一次收缩形成后,便进入稳定的演化阶段,所以星团中恒星成员的年龄、组成成分和出生地都大致相同。
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Surrounding the Milky Way are thousands of spherical globular star clusters containing some of the oldest stars in the Universe.
上千球状星团围绕着银河,其中包含一些宇宙中最老的星星。
They simply don't have enough gravity to hold them together, unlike their much more massive Cousins, the globular star clusters.
仅仅是因为它们没有足够的引力,以致它们不能像比它们大得多的兄弟——球状星团一样聚在一起。
Of course, M13 is now modestly recognized as the Great Globular Cluster in Hercules, one of the brightest globular star clusters in the northern sky.
当然,M13恰当地被称为武仙座球状星团,北天最明亮的球状星团之一。
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