Microsoft and Nasa

"Imagine having the ability to take a virtual tour of the cosmos from your living room. Not just a flat, two dimensional tour, but an experience so engrossing that you have the ability to see the entire sky at once then zoom into detailed views of distant galaxies. The Terapixel project from Microsoft Research makes all of that possible, by creating the largest and clearest image of the night sky ever produced—a terapixel image, now available in the WorldWide Telescope and Bing Maps." 


Here is the tool