Nebular Hypothesis Simulation
Very similar to my other gravity simulation: this simulation shows how a large collection of objects naturally forms to create a solar system similar to our own. There’s almost always a single star in the middle and the occasional planets that orbit it. Most satellites of the star go in a single direction based on the original total angular velocity of the objects, while most retrograde ones quickly collide with other masses and either change direction or fall into the center.
Here’s an interactive version with parameters to fiddle around with.
(Note that more objects = more processing power, and as time passes, the faster the simulation is able to run)