Star Walk is available for $5 from the Apple App Store, is an iPad app that helps stargazers spot constellations and planets from where they are standing. It makes discovering more than 9,000 stars, planets, constellations, and messiers beautiful and easy using OpenGL ES 2.0 to create stunning 3D graphics delivered at 30 fps. Star Walk uses the accelerometer, compass, and Core Location frameworks to accurately determine orientation, bearing, and location to enable viewing of the night sky as it appears from your location.
Hold the iPad up to the sky and see the stars in that position. Pan the iPad across the sky and see the stars enter the iPad and display their names and other information.
It seems like magic, it is hard to believe it is possible. The aesthetics of this app are of the very highest caliber. It's a top notch application that will impress and educate.