Interactive space simulator created by Dan Dixon. It includes the solar system, the nearest 1000 stars, the local group of galaxies. The free version of Universe Sandbox lets you explore and discover any of the included simulations for as long as you want.
Universe Sandbox is an interactive space gravity simulator. Using Universe Sandbox, one can see the effects of gravity on objects in the universe and run scale simulations of our Solar System, various galaxies or other simulations, while at the same time, interacting and maintaining control over gravity, time, and other objects in the universe (moons, planets, asteroids, comets, black holes, etc.) Currently this software is only available for Windows based PCs. Read more