So i was kinda bored and decided to play around.
So i made an earth-moon wallpaper. i havent done one of these in a while.

Highlights: i went for a simple composition, but concentrated a lot of detail on the Earth, with clouds and city lights
In fact, i can even see where i live
The moon has a glow, thats not the atmosphere, its the specularity.
At first i tried to have the sun emit a red glow, but after hours of frustration, I realized that for earth, the only way to go is BLUE.

Downs: im not too satisfied with the crispness of the clouds, and its a shame that i had to compress it for everyone to see, otherwise it wouldve been better.
The moon is not that close to earth. In fact, its 1/4 the size of earth, and in this pic it looks like 1/10th. And its ot that close to earth either, its separated by 250.000 miles. But when you do an Earth wallpaper, the moon just HAS to be there. and i think this is the best way possible to fit it there.

I used what i always use: 3d studio Max, Photoshop, Earth textures from NASA (so this will not be available for prints) and lots of experimentation.

Enjoy