Sandbox Universe

Plain Sandbox Universe lets i build and explore star systems in a 3D space environment with gravity.

How To Play Sandbox Universe

Step through the tutorial, and use the toolbar to add objects and view their characteristics.

Controls and Features

You can add stars, planets, moons, asteroids, comets, black holes, and neutron stars. Time controls let you speed up or slow down, and you can load ready-made systems.

Tips

Most players tweak mass, radius, and temperature to see how they affect orbits. Set collisions to observe mergers and debris scattering.

Another Star Sandbox Game for Gravity Physics

Build and explore star systems in 3D space with gravity, I think it is relaxing, use time controls to speed up or slow down, Melon Sandbox Online lets you add stars and planets while tweaking mass and radius to see how they affect orbits.