Gravitorium Pro - Version 1.0.15 The prime purpose of Gravitorium is to let you playwith ideas about gravity and gravitational systems.While it's not intended to be a highly accurate solarsystem simulator, at low speeds its accuracy is reallypretty good. And, best of all, it lets you "playuniverse maker". Throw in a few extra planets, add ablack hole, set a comet plunging towards the Earth! Orcreate an entirely new solar system from scratch.