In grade school, studies of space are often limited to the eight (that was nine in my day, Pluto fans) planets of the solar system. Discover the mysteries that lie beyond our own planetary backyard on the iPad app Journey to the Exoplanets ($10), which examines the outer planets that continue to be discovered.
Created by Scientific American magazine, the app includes audio, video, illustrated, and essay tours of the planets. If none of these new exoplanets impress you much, build your own perfect planet complete with its own star and gravitational patterns. It's not all fun, games, and planet creation as there is a whole lot of learning to do in Journey to the Exoplanets. An interactive timeline charting the history of space exploration, how a star's light is seen, and science experiments for little astronomers round out an iPad must for the space geek.