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 (Region) Great Basin (North America) (Drainage basin) Pyramid Lake Basin (Nevada) 1 (Lake) Pyramid Lake (Nevada) 2.1 (Stream) Truckee River (California - Nevada) 2.2 (Lake) Lake Tahoe (California - Nevada)