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Physics Engineer - Planetary Destruction

Cross-Platform Engineer

What is Universe Sandbox Legacy?

Universe Sandbox Legacy is no longer available for purchase or download.


Learn about Universe Sandbox, the latest version.




Universe Sandbox Legacy is an interactive space simulator for Windows-based PCs first released in 2008.


Unlike most astronomy software that just shows you what the sky looks like or where the planets are, Universe Sandbox is a powerful gravity simulator. You can add another star to our solar system and watch it rip the planets from their orbits.


Adding an Earth




What can you do with Universe Sandbox Legacy?

Our Solar System - December 12, 1212

Explore our solar system

The solar system is so much more than the 8 planets. It's made up of thousands of asteroids, comets, and moons.

Blow up moons

Unleash destruction on a scale that you never dreamed was possible.

Exploding Moon

Line up the planets with a single click

Use the chart mode feature to line up the planets and moons. Then reorder them by mass or velocity.

Play pool in zero gravity

Break apart a rack of pool balls with such a light touch that gravity pulls them back together.

Pool Balls in Space

Neptune ripping apart Saturn's Rings

Rip Saturn's rings apart in 3D

Put on some 3D glasses to see Saturn's rings ripped away by a passing planet.

Destroy our solar system with a single rogue star

The aftermath of our solar system after a rogue star passes through the center.

Destroyed Solar System

Solar System

View the paths of hundreds of asteroids & moons

Jupiter, it's 60+ moons, the 400 largest asteroids, and Earth and the other inner planets.

Compare the moons & dwarf planets

Compare the size of Pluto, our Moon, and everything else in the Solar System.

Lined up


View our constellations from other stars

View the constellations from other stars and see how they warp and distort.

Make a football orbit a bowling ball

If baseballs and footballs (soccer balls) move slowly enough they can orbit a bowling ball.

Galaxy Clusters

Explore nearby galaxy clusters

Explore the galaxy cluster simulation to understand how big our universe really is.