What iPad Astronomy App Do You Use?

http://twitter.com/chrispirillo - http://facebook.com/chrispirillo - Star Walk for the iPad could quite possibly be one of the coolest things I've ever seen. You can use the app to look at the solar system and learn any number of things about what you're seeing. The coolest thing, though, is when you hold the iPad up to the night sky. Pan the iPad across the sky and see the stars enter the iPad and display their names and other information. This is an amazing way of navigating the night sky. Learning has just become even more fun. http://chris.pirillo.com