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Post by Paulie pchris00 on Jul 9, 2014 9:56:32 GMT -6
Not that I've ever seen Omega Centauri, but I'm not sold that it's a globular cluster. I heard at a talk on the southern skies, I believe at Valparaiso University by Dr. Todd Hillwig, that although it's commonly labeled as a glob, it may in fact be what's left of a dwarf galaxy.
All globular clusters are impressive, but Omega Centauri is in a class by itself. Having a mass of 5 million suns, Omega Centauri is 10 times more massive than a typical globular cluster. Omega Centauri has a diameter of 230 light-years. It’s a stellar city sparkling with perhaps 10 million stars. Globular clusters generally have stars of similar age and composition. However, studies of Omega Centauri reveal that this cluster has different stellar populations that formed at varying periods of time. It may be that Omega Centauri is a remnant of a small galaxy that merged with the Milky Way.