球狀星團 47 Tuc
Globular Star Cluster 47 Tuc
來源：Marco Lorenzi｜發表日期：2024-02-08
球狀星團 47 Tucanae 是南天的一顆明珠。它也被稱為 NGC 104 ，與其他大約 200 個球狀星團一起漫遊在銀河系的光暈中。從地球上看， 47 土星是第二亮的球狀星團（僅次於半人馬座歐米茄），距離地球約 13000 光年。用肉眼可以在靠近小麥哲倫雲的天空中看到它，位於鬥雞座。這個密集的星團由數十萬顆恆星組成，體積只有大約 120 光年寬。星團外圍的紅巨星在這幅銳利的望遠鏡畫像中很容易被分辨成淡黃色的恆星。密集的球狀星團 47 Tuc 也是一顆恆星的家園，它擁有已知的圍繞黑洞執行的最近軌道。
原文：Globular star cluster 47 Tucanae is a jewel of the southern sky. Also known as NGC 104, 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 cluster 47 Tuc is also home to a star with the closest known orbit around a black hole.
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