Click start. The cloud of dust will slowly condense into larger bodies, which orbit each other. Asteroids (gray) combine to form planets (green) and stars (yellow). Run the simulation several times and see if you can create a binary star system or planets with moons.
This runs very slowly at the beginning but will speed up after most of the bodies have escaped the system or collided with each other. The display size is known not to be consistent with collision models. The amount of mass will decrease as fast-moving bodies escape the system.
