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) Lithosphere (Earth) - layer of rock "strata" "lithostratigraphic units" (Group) †Dockum Group (United States: Colorado, Kansas, New Mexico, Texas) (Formation) †Chinle Formation (United States: Arizona, Colorado, New Mexico, Nevada, Utah) (Formation) †Santa Rosa Formation (United States: New Mexico, Texas) (Formation) †Tecovas Formation (United States: Texas) (Formation) †Trujillo Formation (United States: Texas)