You can even change the properties of each of these planets and thus change the way it reacts with the other planets. You can fly through the space and explore whatever you like the stars, Saturn, Jupiter, the sun etc.
You can have endless hours of fun using this amazing piece of software/game.
Universe Sandbox 2 is basically a physics-based space simulator created by Dan Dixon.
Universe Sandbox2: Many moons colliding with the Earth.
