Want to tour the Solar System? Solar Walk is a just-updated universal iOS app that allows you to do just that. The new version has support for 3D, so you get some rather stunning renditions of planets and satellites that are more realistic than what's available in a 2D presentation. I reviewed the app in 2010 and found it to be very educational.
Solar Walk would be very nice for teachers, who could plug it into external monitors in the classroom. As near as I can tell, the app doesn't support the high end 3D method that uses shutter glasses or polarizing filters, but instead uses the tried and true red/blue anaglyphic glasses that became pop
