In my last galaxy design, I ended up using a ton of polishes! It turned out fantastic, but this time I kept it to just a few colors. That way, you get the full impact of each color and nothing gets overpowered.
For the base, I used Ulta Little Black Dress. The white sponging and the larger stars are done in acrylic paint. The rest of the sponging was done in Ulta Envy, Julep Blake, OPI Blue My Mind, and Funky Fingers Riot. To make the small star clusters, I just used a loose matte white glitter that I got from a craft store.