Listen to the Nebula

One of my friends saw some lineart I did for a project for a friend (which I'll post later if he says it's alright) and thought it was really cool, so I made a tutorial out of this image. Which I'll post later because making this image was frustrating enough, I swear if it wasn't one thing it was another.
Anyway, sketched it on paper but everything else was done on the computer. All the lineart and flat colors and shadows and stuff were done on Inkscape, and I got the picture of a nebula called the Keyhole Nebula and a picture of gold texture off google(if you ask I'll post links). I really like how it came out, especially the nebula part, thought I'd never figure that out.