I don't know about others but i always wanted to be closer to the stars. Maybe that is why i like so much Sci-Fi. And that's why i like to have on the background of my desktop space.
Here are some samples of such backgrounds that i use to alter time to time:









How about others? What do you use as backgrounds for your desktop?






























http://www.adrianparr.com/?p=56
Also use similar shots as you available from the National Geographic site, or occasionally photos of my own of things like sunsets and the sea.