Here's a compilation of some great tutorials and galaxy inspiration ideas that, hopefully, will get the DIY section of your brain working!
DIY Tutorial Roundup
DIY Galaxy Top Tutorial: Gwen from This Fashion Is Mine wrote this easy-to-follow tutorial for this pretty shirt, which only requires a dark-colored tee, bleach, and optionally, fabric paint.
DIY Galaxy Nails: For those of you who just want a subtle way to showcase the galaxy design, try this tutorial for gorgeous galaxy nails!