Globular Cluster Omega Centauri: Does an old, red globular cluster have any hot, blue stars? Photos taken in two wavelength bands, with comments on stellar evolution in the cluster.
Omega Centauri: Nucleus of a Milky Way Dwarf Spheroidal?: A technical article from the Los Alamos E-print archive that discusses the possibility that Omega Centauri could be the remains (nucleus) of a once larger satellite dwarf galaxy that has been substantially reduced by tidal stripping caused by the Milky Way's disk.
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