zip file and click on Extract to Universe.Sandbox.2.Update.25.0.3.zip (To do this you must have WinRAR, which you can get here). Once Universe Sandbox is done downloading, right-click the. Now let the download begin and wait for it to finish.
Universe Sandbox Web available for Windows, macOS, and Linux as web-application. Using Universe Sandbox Web, users can see the effects of gravity on objects in the universe and run scale simulations of the 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, such as moons, planets, asteroids, comets, and black holes. Universe Sandbox Web is an interactive space sandbox gravity simulator video game and educational software.
Live here - Universe-Sandbox-Web Description