Pocket Universe: Virtual Sky Astronomy (iOS) app for $0.99

Have you ever looked up at the night sky, and wondered what exactly you were looking at? Pocket Universe is an easy-to-use app that will help you learn constellations, bright stars and planets. You can literally hold up your iPhone 3GS/4 or iPad in front of you, and the app will use the built-in compass to display the same view of the sky you see - but one that's complete with names and information. Then explore the Solar System, and take virtual walks on the surface of the Moon and Mars, before playing a game to help you learn the names of the stars.+