NGC 6397 (also known as Caldwell 86) is a globular cluster in the constellation Ara that was discovered by French astronomer Nicolas-Louis de Lacaille in 1752. [9] It is located about 7,800 light-years from Earth, [3] making it one of the two nearest globular clusters to Earth (the other one being Messier 4).

ngc 6397(也稱為科德韋爾86)是在天壇座的球狀星團。 它距離 地球 大約7,800 光年 [ 3 ] ，使它成為離地球最近的兩個球狀星團之一（另一個是 M4 ）。 這個星團大約有400,000顆恆星 [ 8 ] ，在良好的觀察條件下可以用 肉眼 看到 [ 9 ] 。

2018年4月4日 · This ancient stellar jewelry box, a globular cluster called NGC 6397, glitters with the light from hundreds of thousands of stars. Astronomers used the Hubble Space Telescope to gauge the distance to this brilliant stellar grouping, obtaining the first precise measurement ever made to an ancient globular cluster.

ngc 6397 是一个位于天坛座的球状星团。 它距离地球大约有7,200光年的距离,这使得它成为距离地球最近的两个球状星团之一(另一个是M4)。 这个星团包含大约400,000颗恒星。

This ancient stellar jewelry box, a globular cluster called NGC 6397, glitters with the light from hundreds of thousands of stars. Astronomers used the NASA/ESA Hubble Space Telescope to gauge the cluster’s distance at 7800 light-years away.

2023年11月7日 · Located about 7800 light-years from Earth, NGC 6397 is the second-closest globular cluster to us. Together with other globular clusters it orbits in the disc of the Milky Way, where the majority of stars are located.

2021年2月11日 · Astronomers on the hunt for an intermediate-mass black hole at the heart of the globular cluster NGC 6397 found something they weren’t expecting: a concentration of smaller black holes lurking there instead of one massive black hole.

2021年2月12日 · NGC 6397是银河系当中至少20个经历过中心坍塌的球状星团之一， 这意味着它的中心拥有非常密集的恒星。 由于其核心非常密集，因此将其归类为压缩核心群集。 最初，天文学家 希望 在星团NGC 6397的中心找到一个中等质量的黑洞-期待已久的“超质量黑洞”之间的“缺失环节”，其质量比太阳重数百万倍，位于太阳系的核心星系和恒星质量黑洞，是在单个大质量恒星坍缩后形成的...顾名思义， 中等质量黑洞是一种理论上的第三类黑洞，其大小介于位于星系中心 …

2023年11月7日 · This sparkly image shows Euclid’s view on a globular cluster called NGC 6397. Globular clusters are collections of hundreds of thousands of stars held together by gravity. Located about 7800 light-years from Earth, NGC 6397 is the second-closest globular cluster to us.

2021年2月11日 · This ancient stellar jewelry box, a globular cluster called NGC 6397, glitters with the light from hundreds of thousands of stars. Astronomers used the Hubble Space Telescope to gauge the cluster's distance at 7,800 light-years away. NGC 6397 is one of the closest globular...