Alien planet and how to make one

I always wanted to make space art but I never really go around to start properly. Since I regularly make some sort of computer art I thought I should start something with an alien planet and just try. From a magazine I took a tutorial for Photoshop and tried it in Gimp. With a little help from another tutorial specifically for Gimp I got the following result.

alien planet

There are some aspect which can be improved, but all in all I pleased with the picture. Next step is to acquire some extra techniques. I think I can use this type of alien planets for all kind of print merchandise. If you want to try yourself, this space and planet tutorial is a good place to start.