Study orbits and Newton's laws with this tool. N-body Orbits model displays the dynamics of three to five identical masses orbiting each other subject to Newtonian gravity. The simulation displays the periodic orbital motion of the masses. The initial configuration of the system can be changed via slider. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item.

N equal masses are moving in the same plane under the action of the mutual gravitational attraction. If the initial conditions are chosen in the right way, some periodic solutions of a very special kind may be found: all particles move along the same orbit and the total angular momentum vanishes in the center-of-mass system. One can see some examples in this simulation.

Requirements:
* Java

The license of this software is Freeware, you can free download and free use this graphing software.