We love astronomy here at the Frog Blog and one of the best astronomy apps available at the moment is Pocket Universe. Available for the iPhone and iPad, Pocket Universe helps you learn the constellations, bright stars and planets simply by pointing your iPhone at the sky. The app uses the built-in compass of your iPhone and displays the same view of the sky you see - but one that's complete with names and information. You can then find out more information about that planet, star or constellation with a click of a button. There is a brilliant feature which lets you see the movement of the planets in tonight's skyline - as a time lapse animation. I also love the International Space Station (ISS) tracking facility which will predict when you can see a passing in the night sky. All in all it's a brilliant investment for the amateur astronomer at just €2.39.