But it should be good enough to play around with. I still have some enhancements and upgrades in mind for Matters of Gravity, so stay tuned for future releases. And please drop me a note and tell me what you think. I am open to comments, suggestions, and bug reports. It protects against zooming in to absurd sizes, and keeps planetary images from getting too large.
Gravity now does a much better job of computing orbits.
This applies to orbiting the center of mass. There can be no guarantee of getting a stable system, but at least now when you request that everything orbit the center of mass, all the masses start moving in the proper direction. The color of an asteroid is based on its mass. As asteroids collide and grow larger, the color moves through the spectrum from violet to red. The problem with recognizing keypad keystrokes has been fixed.