斗牛座47：球状星团
(原标题: 47 Tucanae: Globular Star Cluster)
2025-09-05
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也被称为ngc104, 47 Tucanae是南部天空的一颗宝石。它不是一颗恒星，而是一个密集的星团，它和其他大约200个球状星团一起漫游在我们银河系的光环中。从地球上看到的第二亮的球状星团（仅次于半人马座），Tuc 47距离我们大约13000光年。它可以用肉眼在巨嘴鸟星座的小麦哲伦星云附近的天空中被发现。这个密集的星团由数十万颗恒星组成，直径只有120光年左右。在这张清晰的望远镜图像中，星团外围的红巨星很容易被分辨出是淡黄色的恒星。紧密堆积的球状星团Tuc 47也是一颗恒星的家园，它的轨道离黑洞最近。
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Also known as NGC 104, 47 Tucanae is a jewel of the southern sky. Not a star but a dense cluster of stars, it roams the halo of our Milky Way Galaxy along with some 200 other globular star clusters. The second brightest globular cluster (after Omega Centauri) as seen from planet Earth, 47 Tuc lies about 13,000 light-years away. It can be spotted with the naked eye close on the sky to the Small Magellanic Cloud in the constellation of the Toucan. The dense cluster is made up of hundreds of thousands of stars in a volume only about 120 light-years across. Red giant stars on the outskirts of the cluster are easy to pick out as yellowish stars in this sharp telescopic portrait. Tightly packed globular star cluster 47 Tuc is also home to a star with the closest known orbit around a black hole.
© Carlos Taylor