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. www.phy.ncku.edu.tw/~astrolab/mirrors/apod/ap961004.html
NGC 5139 (Omega Centauri) - An image, links, data, and discussion from SEDS. messier.man.szczecin.pl/xtra/ngc/n5139.html
Omega Centauri - Large color photo. cfa-www.harvard.edu/~jpw/weird/omega_centauri.html
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. arXiv.org/abs/astro-ph/9910278
