Very cool. Essentially, a "Google Earth" for the heavens.
Photopic Sky Survey
by Steve Nerlich on May 11, 2011
The Photopic Sky Survey, the largest true-color all-sky survey – along with a constellation and star name overlay option – is available here.
For more detail on how it was created read on…
Nick Risinger decided to take a little break from work and embark on a 45,000 miles by air and 15,000 by land journey – along with his Dad, brother and a carload of astrophotography gear – to capture the bigger true color picture of the universe ever.
The Photopic Sky Survey is a 5,000 megapixel photograph of the entire night sky stitched together from 37,440 exposures. Large in size and scope, it portrays a world far beyond the one beneath our feet and reveals our familiar Milky Way with unfamiliar clarity. When we look upon this image, we are in fact peering back in time, as much of the light—having traveled such vast distances—predates civilization itself.
http://www.universetoday.com/85577/photopic-sky-survey