Wednesday, Sep 10, 2025

NGC 5139, more commonly known as Omega Centauri (ω Cen), is a globular cluster in the constellation Centaurus that is so unique it's widely believed to be the remnant core of a dwarf galaxy that was tidally stripped and absorbed by the Milky Way. It is the largest, brightest, and most massive globular cluster known in our galaxy, and one of the few visible to the unaided eye.