It's fairly easy to create a nice space scene using Trapcode Particular. You just need to use blue and violet, and place your shit on a nice dark gradient background, and add small particles to play the "stars" role. Now mostly anything abstract that comes out of it will fit into a space sequence.
With that being said, in the tutorial I mostly show you a way to freeze these abstract shapes generated by Particular. Using different light emitters with different settings, you can see how easy it is to generate space looking nebulas.
Ofcourse I go over some final steps in achieveing a nice color, and some final touches that you can add to your comp to really give it a "refined" feeling. Hope you enjoy bois, more on the way!