Comet Enthusiast

The American Museum of Natural History has an awesome new app, which offers turn by turn directions to exhibits, customizable museum tours and exhibit information in the 500,000 sq foot facility.

The Explorer, an app for iPhones and iPod Touches which uses over 300 Wi-Fi hotspots to triangulate your position inside the museum—a feat of "indoor GPS" the museum claims is the first of its kind takes the quesswork out of finding the particular piece of history or exhibit you're looking for.