This tutorial was made by a good friend of mine who goes by the name Soulless... it shows you the basic's of how to make nice space effects. firstly download this file then, open it, and open the file called index.htm and hey presto the tut.
"...the idea that a multifaceted infinitely complex planetary body can be meaningfully distilled down to a simple sphere with a texture mapped onto it, is, in a word, obscene." - Greg Martin i agree wit him, u shud try adding more than just a texture to make a planet, ill mebbe make a tut for a complex planet, but I liked the nebula part of the tut