I've added Hubblecast 15 to the Star Movie Map. The Hubble Telescope shows that the stars are bunching up near the centre of Omega Centauri, as seen in the gradual increase in starlight near the centre. This could be because of the presence of a black hole.
Measuring the speed of the stars swirling near the cluster's centre it was found that the stars closer to the core are moving faster than the stars farther away. The measurement implies that some unseen matter at the core has gravitational interactions with stars near it. This could be evidence of an intermediate-mass black hole.
View Hubblecast 15 on the Star Movie Map