Planetary Missions uses the latest orbital theory from recent space
programs letting users launch virtual missions to any planet in the
Solar System.

This is a hybrid Mac/PC disc image, compressed with StuffIt 5.5

Amazon.com Buy link:
[Planetary Missions (box)][1]

Compatibility
Architecture: 68k PPC x86 (Windows)

System requirements Mac:
68040 or PPC
SSW 7.1

System requirements PC:
80486/33 MHz
Windows 95/98

Common requirements:
8 MB RAM
640 x 480 display
2x CD-ROM drive

  [1]: http://www.amazon.com/Piranha-Planetary-Missions-box/dp/B0007DG7TS