Planet Seik and It's 3 Moons

About two days of work...
only 302MB psd...
Original rez 3800x2276...
around 110 layers

Why must I always have an exploding planet....*shrugs*

Now I could never get the exploding moon to quite fit properly, the best placements for it always seemed to make it look like it was crashing into the main planet. Which was not what I wanted, and If it for somereason still looks that way, please tell me. But even if it doesnt, please help me with any tips on how to give this picture better depth. I'm Having a hard time trying to figure out where and how to position objects so that they appear a certain distance from one another, so any suggestions/critiques on this matter would be much appreciated.