Solar systems are procedurally generated using statistics gathered by NASA on over 400 solar systems, including our own. A solar system is seamless, which means that there should be no loading screen when traveling from one side of the solar system to the other, through 57 million x 1039 cubic km3 worth of space.
This video represents an older version of the framework that is currently in use. I’m still writing to improve some very basic issues such as multiplayer behavior. And I’m also still undecided as to the combination of heightmap, meshes and voxels I want to use for planets/moons.