Omega Centauri (Subscribe)
Links
Omega Centauri: Nucleus of a Milky Way Dwarf Spheroidal?
http://arxiv.org/abs/astro-ph/9910278
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.
Omega Centauri - a former nucleus of a dissolved dwarf galaxy?
http://arxiv.org/abs/astro-ph/0008500
A technical article from the Los Alamos E-print archive
NGC 5139 (Omega Centauri)
http://www.seds.org/messier/xtra/ngc/n5139.html
An image, links, data, and discussion from SEDS.