Ideas for my final desktop design

I skecthed four ideas for my desktop design, the theme was sci-fi so I decided to draw some planets and some ships (basic ideas), I admit they are not of the best quality but at least I tried and I think that the ideas really do show some potential.


This is my first idea, its basic but it looks good I think.
The images here are some planets, I would like to use these as they are visualy striking and impressive. Also it has been annotated to show where content will go.










This is my second idea what I thought was that all of the sci-fi films I have seen they have ships so I thought I'll do that and so i have also I have a planet in the backgorund as in contrast shows how big the ships are.