The game world in Dual Universe consists of many procedurally generated planets, moons and asteroids, all of which are composed of voxels and have their own set of resources which can be mined by players. The actual number of stars and worlds is not set or known at this time.
The distances between a planet and the moon(s) around it is small, but the distance between two planets may be much, much larger, and the distances between different star systems is vastly greater than that. In between these worlds is open space. Players are free to fly anywhere in space and go anywhere on any world, albeit the proper technology will shorten the length of the journey. The world in Dual Universe is designed to give players the ability to enjoy an emergent, open-universe game world where anything can happen and they are free to do as they choose.