I was looking thru what actually software comes with these $500 little computers , when I stumbled across something called KStars. I opened it open and lo and behold there is the night sky. I am still looking thru it all but I have noticed it's very interactive, can be as detailed as you like( even down to tracking at .125 of sec) and can even operate a telescope. Not that I have a telescope that can be controlled via comp, but if I ever do I at least have the software. :-)
Here's the link to the actual website
http://edu.kde.org/kstars/
Sorry if it's everyone knows about it. :-)
Dingo