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. "history" (Earth) "global geochronologic units" (Eon) Phanerozoic Eon (541.0 Ma - present) (Era) Cenozoic Era (66.0 Ma - present) [(Period) †Tertiary Period (66.0 - 2.58 Ma)] [(Subperiod) †Paleogene Subperiod (66.0 - 23.03 Ma)] see Period Paleogene Period (66.0 - 23.03 Ma)