Nutshell is as follows:
- Base coat. Whatever color you want (I tend to use tinted gesso for this. Most canvases don't NEED this per se, but I find it helps even out potential inconsistencies) If I'm using a black canvas I tend to skip this step.
- Paint pour. Can be a partial, a full, multiple, etc... This one was pour and smoosh since I was trying to get 2 mirrored canvases out of it. Up to you how you do this step.
- Figure out where you're going to drop in your planets. I made myself some stencils and stencil masks for this out of plastic so they're reusable. Mask your planets using tape/vinyl, whatever.
- Start laying in your background. This can be anything from covering the whole canvas again with a solid color, to as simple as daubing paint on with sponges and brushes in select areas. Up to you and each piece will tell you as you go what it wants.
- Hand brush in the background clouds and dust. I use a variety of brushes and sea sponge for this. Takes a bit of practice to find a technique yo'ure happy with.
- Background stars. I usually use the toothbrush method and one or 2 colors.
- Airbrush blending, detailing, and accents. Peel the stencil masks off, airbrush the planet to give that atmosphereic look and depth. This is where those stencils come in handy, you can use them as outlining masks on the planets you covered up earlier.
- Final hand detailing, foreground stars, etc.
Some visuals to go with that expolanation.
..where bullies abound! 
I’ll delete it
