气泡和星团
(原标题: The Bubble and the Star Cluster)
2021-09-25
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在肉眼看来，这个宇宙组成很好地平衡了右边的气泡星云和疏散星团M52。不过，这对夫妇在其他方面可能是不平衡的。气泡星云，也被称为NGC 7635，镶嵌在星际尘埃和气体的综合体中，由一颗巨大的o型恒星吹来的风吹来，只有10光年宽。另一方面，M52是一个丰富的疏散星团，大约有1000颗恒星。这个星团的直径约为25光年。在仙后座的北部边界，泡泡星云和伴生星云的距离估计在11000光年左右，而星团M52距离我们近5000光年。宽望远镜视野跨度约1.5度的天空或三倍满月的视大小。
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To the eye, this cosmic composition nicely balances the Bubble Nebula at the right with open star cluster M52. The pair would be lopsided on other scales, though. Embedded in a complex of interstellar dust and gas and blown by the winds from a single, massive O-type star, the Bubble Nebula, also known as NGC 7635, is a mere 10 light-years wide. On the other hand, M52 is a rich open cluster of around a thousand stars. The cluster is about 25 light-years across. Seen toward the northern boundary of Cassiopeia, distance estimates for the Bubble Nebula and associated cloud complex are around 11,000 light-years, while star cluster M52 lies nearly 5,000 light-years away. The wide telescopic field of view spans about 1.5 degrees on the sky or three times the apparent size of a full Moon.
© Lorand Fenyes