a very nice example of a space-abstract piece, my only critique is that the DoF sucks (imo)
it looks way too abrupt to be realistic, and in my opinion, DoF can make or break a piece. However, with your style, DoF isn't that important, because your eye is drawn to the big planet, which could be good or bad.
also, nice SSS
/\/\agree/\/\
there should be at least a little blurring
also, a planet large enough to keep it's sattelites fanned out into a ring like that instead of solidifying into a single moon would never be made of solid rock (as it appears to be with those texts), it would be a gas giant.
other than that i really like it: 7.5/10