It's not bad, colour wise, though I'm confused as to why you have birds in space and your lighting doesn't really make sense.
The yellow is a complete clash. It either needs to be blended properly, or changed. Aside from that it looks fairly good, though the planet appears to have stars in it. Some sharpening would make the starscape a beauty. And the birds.... they do look an awful lot like birds.
kindof the same criticism as Papermache gave: The yellow sun (I figured it was the sun ) looks like it touches the earth (I figured it was the earth ). The lighting doesn't make sense where those two "touch". Great job on the space, but bird ARE kinda out-of-place
