Showing how to make a globular cluster in Blender. Particles emit from a single vertex and are dispersed with Brownian motion. Once the animation reaches the desired appearance, new keyframes are added to instantly increase damping to 1 and decrease Brownian to 0. The camera then revolves around the finished cluster. I think some of the blinking is probably caused by a few places were particles intersect momentarily.
The star texture is generated by TinyTim, a Hubble point spread function simulator.