**First Appearance:** #book11 A class G system, Sol-like star on the anti-spinward edge of known space, not far from the borderlands with Unity. In a striking example of parallel stellar evolution, the system, officially known by a catalog number and unofficially known as Milestone, was surprisingly similar to the Solar System—three rocky inner planets, one of them in the habitable zone, and two gas giants, one of them twice the size of Jupiter but only a little more massive, so it has the density of whipped cream, as Netty puts it. #### Milestone (Planet) The earth-like planet in the Milestone system, which goes by the same name as the star.