Pretty indeed!
My only two criticisms are of the earthscape:
1) The lens flare. Is this a chapter picture (in which case no problem) or a landscape? 'Cos lens flares are very direction-dependent, and if the marine can focus on different places and the flare is static, the illusion of its reality is lost. And also, if it's supposed to be seen with the marine's own eyes, why would a lens flare be there in the first place? (Though I admit I am reasonably ignorant of the specific mechanism by which lens flares are created.)
2) Minor nitpick: if the sun is that far away, I would guess that the only features visible on the earth would be the crescent of the hemisphere that's lit up, but turned away from the viewer. The rest would just be a shadow against the stars, no? This is really style, of course.
Comments:
On the nightscape, the water is quite visible, almost phosphorescent. Is this intentional? I didn't realize that the nightscape was the same terrain as the dayscape until I read the note in your post; the night version looks less natural, I think.
I'm also curious now about that foliage I can see silhouetted against the light background on the Pfhor shot. Is it part of the story in any way?
Overall, I like muchly!
And no, I didn't realize that it was Mars. Good job on that, too, even if it's unused.
Lunair