The Omega Centauri globular cluster in the constellation of Centaurus. At a distance of 17090 light-years, this is the largest and most massive known globular cluster in the Milky Way.
...
The picture was processed from 22hr 50 min of H alpha, SII and OIII data curated by Ian Howarth. The images were stacked using Deep Sky Stacker and processed in Photoshop. The final pi...