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" "chronostratigraphic units" "global chronostratigraphic units" †"Precambrian" (4600 - 541.0 Ma) (Eonothem) †Proterozoic Eonothem (2500 - 541.0 Ma) (Erathem) †Mesoproterozoic Erathem (1600 - 1000 Ma) (System) †Stenian System (1200 - 1000 Ma)