Long title, but it about covers it. In this tutorial, I'm demonstrating how to get the look of an Interstellar Movie-type Black Hole using the Bulge effect, 3D layers, adjustment layers and how to use expressions to compensate for the fact you can't use Bulge in 3D space.
I've included the project file here:
Other tutorials mentioned:
CC Particle Galaxy tutorial
Cinema 4D Black Hole