Run Steam to download Update 20.3, or buy Universe Sandbox ² via our website or the Steam Store.

Update 20.3 features two new simulations for the recently discovered exoplanet, Ross 128 b, and the first observed interstellar visitor, ‘Oumuamua. This update also includes a number of smaller improvements and bug fixes.

Ross 128 b

On November 15, 2017 astronomers with the European Southern Observatory (ESO) discovered Ross 128 b, a potentially habitable, Earth-sized exoplanet orbiting a red dwarf star 11 light years away.

Though Ross 128 b is farther than the closest temperate planet, Proxima b, it orbits a “quieter” red dwarf that emits far less deadly ultraviolet and X-ray radiation. This makes it a much better candidate for habitability.

Learn more on ESO’s website.

See Ross 128 b in Universe Sandbox ²:
Home > Open > Ross 128 with Earth-sized Planet


On October 19, 2017, astronomers in Hawaii observed an asteroid soaring past Earth. Analysis of its trajectory revealed that it is the first interstellar object ever observed in our solar system. Nicknamed ‘Oumuamua, meaning “a messenger from afar arriving first,” the asteroid carries the story of a distant star system born a long time ago.

Learn more about ‘Oumuamua on NASA’s website.

See ‘Oumuamua in Universe Sandbox ²:
Home > Open > Oumuamua in 2017


Check out the full list of What’s New in Update 20.3.