Four-body problem

The gravitational simulation is programmed to automatically stop either when one of the bodies flies out of the bounds or on a near collision between any two bodies.
Before you start experimenting with the model, please read the sections Technical Comments and Suggested Experiments.

Make sure that Java 2 is enabled in your browser. To start the model, click on Simulation in the left panel. Allow several minutes, depending on your Internet connection, for the applet to load.