This is a simplistic simulation of a solar system forming. It calculates only the gravitational force between the objects and plastic collisions. You can find the exe here and the source here. The simulation is based on the classical description of how a solar system is formed: There is a lot of dust and it collides and it forms rocks than they collide and form miniplanets than they attract and collide and form planets and the sun.
The text is in romanian. To start you can put the values: 1000 , 1000 , 30 , 3 , 1 in order.
Those mean: