I just came across the uberl33t piece of software that lets you navigate anywhere in the universe in full 3D. Thats only the gist of it, go see it for yourself. It will keep you entertained for quite a while. Its an 11mb d/l, so its no biggie. This app is called Celestia, heres the site:
http://www.shatters.net/celestia/index.html
Have fun.
/me quivers with excitement.