Exoplanet discovery is fascinating stuff. We've been at it for a while now using various techniques and instruments, and our perception of our stellar neighborhood in terms of planetary frequency, composition and the potential for life has shifted dramatically from, say, a decade or two ago. Keeping up with the rapid developments in this astronomical field can be tough, if this field indeed piques your interest.
Enter the "Exoplanet" application for the iPhone (and related devices) by Hanno Rein. This app is easy to use, visually pleasing and boasts some great features. Such features include a current and frequently updated database of all known exoplanets with related information (physical characteristics, parent star characteristics, orbital details, detection method), animations which depict the planet's orbit and size with respect to planets in our own Solar System, a plot map which depicts the location of all known exoplanets in our galaxy, a current news feed as well as some excellent information about exoplanet science (discovery, analysis of atmospheres etc.). The other nifty feature I like is the push notification you receive when a new planet is discovered. It makes you feel somehow more connected to the exoplanet hunter community. Nice touch.
Best of all (not that I am a cheapskate!) but it is FREE! What a great idea to make this type of application, and the inherent data within it, free. Very good show!
I spend a lot of time using this application, purely just out of interest. It's fascinating to go through each planet (currently standing at 505!) and review their details. Seeing the visual comparisons is sometimes staggering., especially when focusing on the super Jupiter type planets. How many moons will they have?!
Check it out - I don't think you'll be disappointed.