Space Sphere (Project Piece)

This just part of a project (related to the Bright and Brilliant) I'm working on for my 2D Digital Animation (or After Effects) Final. The auroraish areas are small because I have to be zoomed in on the frame quite a bit.
There was a tutorial I used to get the stars the way they are. I don't remember where I got it. However the stars were obtained using a monochrome noise filter on a black background, then you mess with levels. The rest of it I just sort of experimented with techniques I knew.