Planets for iPhone is the application that you need if you are an astronomy enthusiast. With it you will have a complete guide to the Solar System in your pocket.
In Planets you will be able to locate planets with a 2D view of the sky, but you will also have a 3D vision mode simulating the way you would see the heavenly bodies from a planetary. It will also allow you to find out when any heavenly body will be visible taking into account your position on Earth, the time the Sun and Moon will rise and set with their exact coordinates and the location of visible constellations.
Access also in 3D views and in rotatory modes to the view of the Moon and Solar System planets, with all kinds of information about them and online access to Wikipedia so you don't miss any information.
Download Planets and enjoy astronomy from your iPhone.