Here's the final clip we'll be re-creating:
Tutorial on creating the above:
Using Trapcode Mir v1
For finishing touches also uses Trapcode Shine and Form.
Covers setting up the "spikey" shape using an amplitude map for the fractal. Also shows the "finishing"; creating the background, light-rays, shadows, glow, atmospheric particles etc.
Excellent tutorial by School of Motion. Covers a lot of useful techniques.
Inspired by works of Matthias Muller in his video "The Space We Live In", I have created some galaxy/ nebulae objects entirely inside of After Effects with the help of Trapcode plug-in and some other built-in ones.
PS: I have worked on some other galaxy videos too, and will upload and have plans on doing tutorials on them once I get all the permissions from the producers and the studio.