As far as space goes...
... there are a few spots in the beginning where it clashes, which should not happen, try changing the bass not to fit with the melody there. other than that, this has a very ambient feel, I enjoyed it alot. The synth at 0:47 was a bit annoying, not the kind of synth I would want to hear. But there isn't much you can do about that. Overall, Awesome song, definately fits the scenery of space. Very open, and technological! :P