The program has three modes. First, Sky, allows one to view almost every known thing in space via multitude wavelengths of data. Second, Planets, allows the viewer to pan across 3D models of our solar system. Earth is like Microsoft's answer to Google Earth but lacks cool KML-like add-ons. Finally, Panoramas has HDviews of things like Mars Rover images.
A neat feature is the ability to create presentations with the tool. Hopefully astronomy teachers and buffs will make many projects and release them to the public.