April 2, 2008 - HubbleSite
... Astronomers at the Max-Planck Institute for Extraterrestrial Physics in Germany and the University of Texas at Austin have reported on the possible detection of an intermediate-mass black hole in the core of Omega Centauri.
The result is primarily based on spectroscopic measurements obtained with the Gemini South observatory in Chile which suggest the stars are moving around the central core of the cluster at higher than expected velocities. ...