I modified a bit your node setup. I reduced alpha for black in ramps donw to 0 so I could add star background.
I also removed the noise texture attached to color dodge node and replaced it by plain white. It didn't really change the result but I think it really improved rendering time.
Plus some color change.
Now I'm working on animating it :)
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!