A very useful feature is a comparison section, in which students can compare one planet to another, both in internal structures, moons, orbits, etc. And these can be printed out so that students can take them home or incorporate them into reports. My favorite part of the program relates directly to simulations. The program has a marvelous simple explanation of orbital mechanics, including spacecraft and attaining orbits. Students using this simulator learn very fast that what NASA does routinely is certainly anything but routine.
All missions are possible.
The manual is helpful and quite easy to follow. The whole program fits on one high density disk, and is a breeze to install on a hard drive. I believe any creative teacher can use this cost efficient program in spectacular ways to help build enthusiasm about the solar system in the classroom. I highly recommend it.