Universe Sandbox

N-body simulation at almost any speed using Newtonian mechanics. Real science, real physics, no supercomputer required. Epic, mind blowing collisions of massive planetary bodies that leave behind molten craters.  Start with a star, then add a planet. Spruce it up with moons, rings, comets, or even a black hole. Watch sea ice grow and recede with the seasons because of a planet’s tilt - change the tilt and change the seasons. Or move planets close to a star and see the oceans boil away as the surface heats up. Watch a supernova unfold by colliding two stars, cranking up their mass, or making them explode at your whim.  Hitch a ride with spacecraft including Juno and New Horizons, or view a total solar eclipse . Subnautica