The best thing about this is you don't need to have a supercomputer to make this simulator work. If you really were to observe the universe it would be the same. The simulation happens according to real science. Simulate GravityYou can make the simulation at any speed using Newtonian mechanics. Let's take a specific look at what are the things that you can do with Universe Sandbox 2. The stunning graphics will make you feel like you are out there in the space. It is completely gravity based and so if you happen to add your own planet to our solar system, it will obstruct the path of the other planets as well because it will pull the other planets to itself. This simulator is basically created to match with what will happen in reality when you make the changes to the properties in the real universe. 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.