Omega Centauri (ω Cen, NGC 5139, or Caldwell 80) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in 1677. Located at a distance of 17,090 light-years (5,240 parsecs), it is the largest known globular cluster in the Milky Way at a diameter of roughly 150 light-years. [10]

半人马座ω，又称NGC 5139。 是一个曾被误认为 恒星，环绕着 银河系 的 球状星团。 半人马座ω是银河系内已知最大的球状星团，于1677年被 爱德蒙·哈雷 发现，也是迄今所知最大的，且唯一能以肉眼看见的球状星团。 半人马座ω距离地球约18,000光年，包含有数百万颗第二星族的恒星，年龄大约为120亿年。 半人马座ω是 拜耳命名法 的名称，并不因为不是单独的恒星而变更传统的名称。 在大量观测之后，发现半人马座ω不同于其他的 球状星团：首先，它包含几种不同世 …

2024年6月2日 · Omega Centauri (Caldwell 80, NGC 5139) is the largest and most massive globular cluster in the Milky Way galaxy. With an apparent magnitude of 3.9, the cluster is easily visible to the unaided eye.

2024年8月23日 · Caldwell 80, also known as NGC 5139 and commonly called Omega Centauri, is home to around 10 million stars. Located about 17,000 light-years away from Earth toward the Centaurus constellation, the cluster has a diameter of about 450 light-years.

The globular cluster NGC 5139 is located in the constellation Centaurus and it is visible to the naked eye. At a declination of -47° the object is not visible from Europe. On 12 April it in opposition with the Sun and is therefore highest in the sky at around midnight.

2022年7月4日 · 半人马座欧米伽星团（半人马座ω球状星团，又名ngc 5139）是半人马座的一个古老的球状星团，古人很早就发现了这个星团的存在，但是一直把它当做一颗普通的恒星，半人马座欧米伽星团距离我们有17090光年，是银河系已知的质量最大的球状星团，直径大约为150 ...

2019年8月24日 · Explanation: Globular star cluster Omega Centauri, also known as NGC 5139, is some 15,000 light-years away. The cluster is packed with about 10 million stars much older than the Sun within a volume about 150 light-years in diameter. It’s the largest and brightest of 200 or so known globular clusters that roam the halo of our Milky Way galaxy.

2025年1月12日 · Omega Centauri (ω Cen, NGC 5139) is the most massive globular cluster of the Milky Way and is believed to be the stripped nucleus of an accreted dwarf galaxy. This makes it a unique laboratory to study both a witness of the merger history of the Milky Way and a nearby low-mass galactic nucleus.

2012年6月28日 · NGC 5139 or Caldwell 80 (also known as the Omega Centauri) is a in the constellation . It has an apparent visual magnitude of 3.6 and its angular diameter is 36 arc-minutes. Omega Centauri lies at an estimated distance of 17,300 light years and it contains several million Population II stars.

2021年4月16日 · NGC 5139 (Omega Centauri) NGC 5139 (also known as Omega Centauri; Caldwell 80) is a globular cluster in the constellation Centauri. It has an apparent visual magnitude of 3.6 and its angular diameter is 36 arc-minutes. Omega Centauri lies at an estimated distance of 15,800 light years and it contains several million Population II stars.