One you might try is called Celestia.
http://sourceforge.net/projects/celestia/
Its a pretty comprehensive begginers (and not so beginners) program (3D) with heaps of interesting interactive options and graphics. It allows you to move throught the galaxy (including the solar system) and view different areas of space from different viewpoints. The solar system part is great . you can display orbits, look at it from different angles to the eliptical. Heaps of useful stuff.
Once you download it and install it go to the help menu and copy the control key options (under "Controls") and paste them into wordpad or notepad, then print them out. Makes moving through and operating Celestia a lot easier.
Good luck with it
Paul