Omega Centauri close-up (LRGB)

NGC 5139; aka Omega Centauri, a globular cluster in the constellation of Centaurus, estimated to contain approximately 10 million stars, with a total mass of 4 million solar masses, making it the most massive known globular cluster in the Milky Way. There is evidence of an intermediate-mass black hole in the dense core of this cluster, although this is disputed.