Here is the link for part 2 of the apps I have found for astronomy. I covered the following Apps: Exoplanet (by the way he has a new one out called Kepler that has all the date from the recent Kepler release but it is $2.99) Planets Messier List (Mainly for those working the Messier list. I think it has some quick reference material if someone needs it to share at a Public Outreach Star Party). Sky&Telescopes Sky This Week Cosmic Discoveries by the American Museum of Natural History (won't help you observe but it is COOL if you haven't seen it!). AstroPlanner App (some serious planning for observing or imaging here; costs $9.99) iPushTo (setting circles in ALT and AZ for the Messier on a non-driven scope. Not sure how it works, haven't been able to try it . . . been working on that Ark and making sure there's an observatory on it). http://jaysastronomyobservingblog.blogspot.com/ -- Jay Eads