Jeff Rommereide 343 Elma Ave. Macintosh or Power Macintosh with 800 K free memory and System 6.0.7 or newer. Gravitation Ltd. is currently available only for Macintosh computers. The solar system construction set for Macintosh. Lots of sample solar systems are included or you can create your own with the built in point and click editor.
Documentation is built in.
You may give copies freely to friends and family. Users must understand that the price they paid for the disk does not include the shareware registration fee. Please keep all the files together.