Well, since [email protected] showed everyone how to do it, here is another one from me!
I made the Nebulea texture myself in Photoshop with about 10 layers and a few adjustment layers. The planet and the moon textures I have had for a while. I lit the planet and the moon using radiosity to get the nice gradient shadow line and placed a layer only lamp to light the nebulae.
Let me know what you think, and if your getting bored of seeing these things? (j/k . I plan on doing a lot more of these. Just have to get my ship modelling down a bit more).