that looks awesome man. very nice work, the contrast between the two well chosen colours is awesome. maybe the yellow dust could need a bit of detail, but either way, it looks fine this way too. and, i agree with all the others on the small planet texture, but i'm sure you've already noticed that
Only thing I can see that needs improvement is the ball on the right side, partially in the light. It's too plain and looks like it needs some texture to it. Well, it'd be awesome if it was 1600x1200 too.
that's some lovely work, I love those strong colours, the contrast between the warm and the cold hues. the planet has a great level of detail and is softly framed by the dust clouds. seriously, I think the only point where this image is lacking is the starfield. the noise filter shows too clearly =/ a few more outstanding stars, and a more interesting starfield (I do not say more stars, just better placed ) would really enhance this piece I think.
anyway, it already looks superb as it is