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) Atlantic Ocean Basin (Drainage basin) Eurafrican Mediterranean Sea Basin (Drainage basin) Nile River Basin (Africa) (Drainage basin) White Nile Basin (Drainage basin) Lake No Basin (Drainage basin) Lake Albert Basin (Drainage basin) Victoria Nile Basin (Drainage basin) Lake Victoria Basin (Stream) Kagera River