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) Southwestern Australia Forests and Scrub (Terrestrial ecoregion) Southwest Australia savanna (Australasia) 1 (Bioregion) Yalgoo 2 (Bioregion) Geraldton Sandplains 3 (Bioregion) Avon Wheatbelt