I tried to combine two of my favorited styles - the detailed one with realistic planet surfaces and the colorful nebulae "WTF?" style. Here is the outcome. Enjoy it, download it, place it on your desktop or, If you are really generous, fave it!
Hit 'download' to get:
Software: PS CS2, 3D SMAX 9
Hardware: A6 WACOM Bamboo One
Time: about 20 hours (most spent on the planet - remaking it over and over again...)