Vision: I think the vision is clear on this one, it is a rather simple concept that shows a lonely planet with a very distant ambient light source.
Originality: This piece in particular gets a few extra bonus originality points because it is much less done than other space pieces. The rings give it a nice touch.
Technique: The planet and planet details look fantastic, and the rings were really well done as well! The nebula in the background has a couple problems with fluidity though. There is a cut-off that is in the upper right side of the image that detracts from the overall flow. I really love the subtle wisps of color right behind and above the planet, those are fantastic looking, but the bottom left side could use a little refinement, especially since I feel it looks a little too artificial and detracts a little bit from some of the other great subtleties of this piece.
Impact: Overall, when I look at this image, I see a lonely planet with some very nice points of interest, so I think the impact is definitely there. Just clean up the nebula a little bit and maybe vary the actual "color" of space/stars to add a little bit more loneliness.
Overall Deviousness: Killer job on this one! It has a couple flaws, but hey, the 'meat and potatoes' of this image look fantastic! Keep up the strong work
the only problem i see in this is the shadow on the ring, i dont know why but it just looks unnnatiral. perhaps of therew was harder light on one side of the planet then it would be more vidible but so far i think with the current lighting the shadow would be more faint (you also seem to have light coming from below the planet seemingly.