网络释义专业释义英英释义
...sier, 1730∼1817年，译注一）时代所使用的小口径望远镜，对这些夜空深处的天体，除了可把几个显著的 散开星团 （ open cluster ）分辨出一颗颗的星以外，其他的，看来只不过是一些蒙眬的光斑而已。
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疏散星团 - 引用次数：6 参考来源 - 疏散星团系统运动学参数的最大似然估值银河星团分散星团散开星团
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疏散星团
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开路 - 引用次数：1 参考来源 - Sierpinski地毯格点图上的渗流问题疏散星团
·2,447,543篇论文数据，部分数据来源于NoteExpress
Open cluster
- abstract: An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist.
以上来源于: WordNet
双语例句权威例句
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This open cluster is particularly ancient, estimated to be nearly one billion years old.
这个疏散星团尤其古老，据测算有十亿岁了。
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NGC 2818 is one of very few planetary nebulae in our galaxy located within an open cluster.
NGC2818是银河系中少数几个位于疏散星团内部的行星状星云之一。
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Hence, it is rare that an open cluster survives long enough for one of its members to form a planetary nebula.
因此，一个疏散星团很少能够存活到它内部的某个成员变成行星状星云。
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