Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2017 July 11 Explanation: Behold the largest ball of stars in our galaxy. Omega Centauri is packed with about 10 million stars, many older than our Sun and packed within a volume of only about 150 li
![APOD: 2017 July 11 - Star Cluster Omega Centauri in HDR](https://cdn-ak-scissors.b.st-hatena.com/image/square/45071ab99d0b241e8a677b6785b9c0fb5ebbb008/height=288;version=1;width=512/https%3A%2F%2Fapod.nasa.gov%2Fapod%2Fimage%2F1707%2FOmegaCentauri_ODay_1080.jpg)