奥米茄星团
2021年06月03日 Millions of Stars in Omega Centauri Image Credit & Copyright: Ignacio Diaz Bobillo 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 ...