Do u make any gif pic of scifi??
Sorry I don't have more to say about the image itself, the criticism isn't flowing from my pores today, what I will suggest is really striving more than anything for depth in your composition, know from near the beginning of the process what you're going for, and depending on the piece, pump as much depth into that bitch as possible, and also try to make sure each element is serving a purpose other than space filling, compositional devices, such as planets and the clouds have to lead the eye to your main point of the image. Hard to explain and I'm starting to ramble, but i think of a sort of valley of (fantasy ;D) space clouds, the eye is being lead through the valley, and it will have depth, this looks just a little bit like your clouds are just thrown in there, without really supporting the piece, as was said earlier, don't let the stocks pwn you. Basically I think you're aware of this already,
Long story unimaginably longer, go hard motherlover, you're doing fucking brilliantly.
Man i loved it
however I do have to agree that the starfield/space seems to having a direct conflict with the clouds