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) †Paleozoic Era (541.0 - 251.902 Ma) (Period) †Permian Period (298.9 - 251.902 Ma) (Epoch) †Cisuralian Epoch (298.9 - 273.01 Ma) 1 (Age) †Asselian Age (298.9 - 293.52 Ma) 2 (Age) †Sakmarian Age (293.52 - 290.1 Ma) 3 (Age) †Artinskian Age (290.1 - 283.5 Ma) 4 (Age) †Kungurian Age (283.5 - 273.01 Ma)