Natura - nature actualia - actual entities Mundus Plinius - physical world Astra Plinius - celestial bodies Universe (Supercluster) Virgo-Hydra-Centaurus Supercluster (Supercluster) Virgo Supercluster (Cluster) Local Group (Galaxy) Milky Way Galaxy veter. (Spiral arm) Orion Arm (Region) Local Bubble Local Interstellar Cloud (Planetary system) Solar System (Planet-satellite system) Earth System (Planet) Earth veter. "spheres" (Earth) (Sphere) Hydrosphere (Earth) - layer of water (Drainage basin) Pacific Ocean Basin (Drainage basin) Bering Sea Basin (Drainage basin) Bristol Bay Basin (United States: Alaska) (Bay) Bristol Bay (United States: Alaska: Dillingham Census Area)