Found this the other day: http://workshop.chromeexperiments.com/stars/ If you haven't seen it I recommend you do. If it doesn't start in IE try Chrome when viewing it. Take the tour, it's pretty awesome.
It is basically just space -in your computer. Which is really quite cool. They've attempted to visualize the nearby stars, you can float around and explore, read about stars and get a good look at stuff.
If you want to know more about the guy who made it and the project: http://www.html5rocks.com/en/tutorials/casestudies/100000stars/