Universe Sandbox's most impressive achievement, however, lies in illustrating how the force of gravity affects every tiny little object in all of existence.

What is certain is that space is very, very shiny, thanks to a custom-built game engine, and Parnell says that this picturesque and procedurally-generated universe will be infinite.

Currently in Early Access, Universe Sandbox ² is an even greater space simulator with room for all sorts of creativity. You can terraform planets, supernova a star, collide planets, and much more.