I've done a few. I delete the ground plane, then select Starfield (with 0 haze for clarity). Turn up the number of stars, but turn down the intensity (you get more stars, but not not as 'big.'

The trick is the sun; I tend to move it around the edges...then I'll use faint radial lights to bring up the detail. of whatever spaceships, etc., I'm using.

One thing to watch; if you put in planets, make sure the shadow doesn't fall across the planet...ruins the whole thing...;)

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)