Made the Sun with Fractal noise, NASA UV imaging, and Heat Distortion. The Nebula is practical macro footage of kombucha in an aquarium with a single light on it in the dark. For the camera move  I pushed the sun and nebula extremely far back in z-depth space and then scaled them up to a massive size.  Asteriods and planets are scaled proportional to the sun and spread out through that very deep z-depth camera dolly.