Sharing how I did my nebula nails to ring in the new year!
I was unable to take step by step photos myself, but I though I would share the guide I used! This is from Didoo at DeviantArt
My base coat was a black that had some subtle glitter in it already. I prefer this, as I feel a glitter top coat can be distracting from all the nebula work. I did, however, take a glitter polish and dab it lightly over just the nebula. Best of luck, and happy space exploring!