英仙座的双星团

                               
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Explanation: Some 7,000 light-years away, this pair of open or galactic star clusters is an easy binocular target, a lovely starfield in the northern constellation Perseus. Also visible to the unaided eye from dark sky areas, it was cataloged in 130 BC by Greek astronomer Hipparchus. Now known as h and chi Persei, or NGC 869(above right) and NGC 884, the clusters themselves are separated by only a few hundred light-years and contain stars much younger and hotter than the Sun. In addition to being physically close together, the clusters' ages based on their individual stars are similar - evidence that both clusters were likely a product of the same star-forming region.

转自APOD

见识了，岂今为止还没有认识英仙座。

double cluster  见识真面目了

也许很多年后这两个星团会合并为一体。好图。

此图片漂亮啊！

5# 霓虹彩云

顶了楼主
精华……收藏之

到现在我还没能亲眼看到呢,不知道具体在哪个位置?

酷！好帅！据我们多少光年啊！

9# 轩辕龙南


大约7000光年

8# 肥蛙


小方框标出的就是双星团

双筒只能窥见一斑

版主这么简单的都懒得翻译了吧。没办法，这个已经加入索引，我自己来翻译吧
Explanation: Some 7,000 light-years away,this pair of open or galactic star clusters is an easy binoculartarget, a lovely starfield in the northern constellation Perseus. Alsovisible to the unaided eye from dark sky areas, it was cataloged in 130BC by Greek astronomer Hipparchus. Now known as h and chi Persei, orNGC 869(above right) and NGC 884, the clusters themselves are separatedby only a few hundred light-years and contain stars much younger andhotter than the Sun. In addition to being physically close together,the clusters' ages based on their individual stars are similar -evidence that both clusters were likely a product of the samestar-forming region.
双筒望远镜很容易发现7000光年外的这对疏散星团，这块可爱的星空位于北天的英仙座。它们能在黑暗的夜空中被肉眼看到，公元前130年希腊天文学家希帕克就记录了它们。现在它们被编号为英仙座η和χ，或者称为NGC 869(位于右上)、884。它们相隔数百光年，都包含（大量）比太阳年轻和热得多的（巨）星。有证据表明这2个星团很可能诞生在同一个恒星形成区域，因为这2个星团本身物理上就比较靠近，而且星团中的恒星年龄都很接近。