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汉语拼音：xīng tuán

十颗以上的恒星被彼此间引力束缚在一起而组成的恒星群。分球状星团和疏散星团两大类。前者由老年恒星密集成球形，分布在银河系中心周围，总数估计约五百个；后者由年轻恒星组成，组合松散，已发现一千三百个，多数聚集在银道面附近。

1. 由十个以上的恒星组成的、被各成员星之间的引力束缚在一起的恒星群。

• Eventually, clusters of many thousands of stars develop and began to look and behave like something that could be called a sub-galaxy.

  最后，数以千计的恒星构成的星团发展成为从外表到行为都可以在某种程度上被称为准星系的东西。

• The star Merope is in the Pleiades star cluster and is veiled by gas from at least one cloud that the cluster is passing through.

  Merope星是昴宿星团而隐藏于气体中，至少星团正通过一片云。

• A study of many globular clusters gives another important bit of information.

  对许多球状星团进行研究之后，使我们得到一些重要信息。

• Besides the dark dust, NGC 7049appears similar to a smooth elliptical galaxy, although featuring surprisingly few globular star clusters.

  除了暗黑尘埃，NGC7049则与平滑的椭圆形星系相似，尽管其具有令人吃惊的几个球状星团。

• Red giant stars on the outskirts of the cluster are easy to pick out as yellowish stars in this sharp telescopic portrait.

  在这张清晰的特写中，我们可以清楚地看到星团边远的红巨星，即那些黄色的星星。

• We believe that during the course of the evolution of the Universe, stars and clusters might have been formed before the galaxies.

  我们相信，在宇宙的演化过程中，恒星和星团可能比星系更早形成。

• Near the bottom of the scene, an even more distant Pleiades star cluster and bright planet Jupiter shine on this cloudy northern night.

  图中接近底部的位置，更加遥远的昴宿星团和明亮的木星也正在云层中闪耀。

• He posed as a privateer for two years, exploring the underworld of the Hapes Cluster in search of his brother's murderer.

  在接下来的两年里，他假扮成私掠船船长，混迹于海皮斯星团的黑社会，寻找杀害哥哥的凶手。

• collisions can modify the long - term evolution of entire clusters , and the most violent ones can be seen halfway across the universe.

  碰撞可以改变整个星团的长期演化，而最激烈的情形，可在半个宇宙外看到。