The Photopic Sky Survey

If you're at all interested in astronomy, don't miss the Photopic Sky Survey. It's a magnum opus - tons of photos of the Milky Way shot from all over the planet stitched together. The result is magnificent. But then you check out the interactive version, and zoom in...a lot! It's speechless-making (and, amazingly, shows only hundredth of one percent of our galaxy's stars).

It's sort of like Google Galaxy.