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) Biosphere (Earth) - zone of life "terrestrial and freshwater ecoregions" (Biogeographic realm) Australasia (Ecoregion complex) Southern Australia Mallee and Woodlands 1 (Terrestrial ecoregion) Eyre and Yorke mallee (Australasia) 2 (Terrestrial ecoregion) Mount Lofty woodlands (Australasia) 3 (Terrestrial ecoregion) Murray-Darling woodlands and mallee (Australasia) 4 (Terrestrial ecoregion) Naracoorte woodlands (Australasia)