Awesome! It reminded me of laying on the soft grass in the cool of Autumn and looking up through the trees to catch glimpses of the moon as the trees moved softly in the breeze. It's wonderful.
I like it though I'm not quite sure exactly what it is meant to depict space-wise - it has a general spacey look, but I'm not sure exactly of what... But I think this is what I like about it. It has a dreamy, unreal quality to it. It seems to connect the misty, cloudy nature of dreams and the clarity of space. It makes me think of the idea that people can leave their bodies behind when they dream and wander - beyond their own flesh and place, beyond the Earth into the places between the stars. Here, you see the remnants of confusion/cloudiness being left behind - maybe the atmosphere of Earth, maybe the confusions of material existence for the clarity of what lies beyond. So the dreams aren't really the source of confusion, but the path to true clarity.
Or something like that. I'm making this up. Obviously. Badly. Obviously. But still... I like it.
Interesting, but i really don't see any resemblance of space (other than the black of course :P) ... you may want to have a look at Greg Martins tutorials if you're interested in space art :)