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" (Eonothem) Phanerozoic Eonothem (541.0 Ma - present) (Erathem) Cenozoic Erathem (66.0 Ma - present) (System) Quaternary System (2.58 Ma - present) (Series) †Pleistocene Series (2.58 - 0.0117 Ma) (Subseries) †Lower Pleistocene Subseries (2.58 - 0.774 Ma) 1 (Stage) †Gelasian Stage (2.58 - 1.80 Ma) 2 (Stage) †Calabrian Stage (1.80 - 0.774 Ma)