Copyright:
原文:
Globular star cluster 47 Tucanae is a jewel box of the southern sky. Also known as NGC 104, it roams the halo of our Milky Way Galaxy along with over 150 other globular star clusters. The second brightest globular cluster (after Omega Centauri) as seen from planet Earth, 47 Tuc lies about 17,000 light-years away and can be spotted naked-eye near 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. Recent observations have shown that 47 Tuc’s white dwarf stars are in the process of being gravitationally expelled to the outer parts of the cluster due to their relatively low mass. Other colorful low mass stars including yellowish red giant stars are easy to pick out on the outskirts of the cluster in this recently released sharp telescopic portrait by the Hubble Space Telescope.
中文翻譯:
47 Tucanae（又名NGC 104）是南天星空中的一顆璀璨明珠。這顆球狀星團與超過150個其他球狀星團一同游弋於我們的銀河系之中。作為肉眼可見的第二亮球狀星團（僅次於Omega Centauri），47 Tuc距離地球約17,000光年，並且可以在鸚鵡座附近的小麥哲倫雲旁被肉眼觀察到。這個密集的星團由數十萬顆星星組成，直徑僅約120光年。最近的觀測顯示，47 Tuc的白矮星正因其相對較低的質量而被引力逐漸驅逐至星團的外圍。在哈勃太空望遠鏡最近發布的清晰望遠鏡肖像中，外圍的黃色紅巨星等其他色彩斑斕的低質量星星也非常顯眼。
#47Tucanae #NGC104 #GlobularCluster #MilkyWay #Astronomy #HubbleSpaceTelescope #TucanaConstellation #Stargazing #SpaceLovers #AstronomyLovers #StarCluster #CosmicWonders
來源:NASA每日圖片
