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" (Bioregion) Old World (Biogeographic realm) Palearctic (Terrestrial ecoregion) English Lowlands beech forests (Palearctic) "United Kingdom" (English Lowlands beech forests) "England" (United Kingdom; English Lowlands beech forests) (Town [pop. 10k - 50k]) Greenwich (England: Greater London: Greenwich) 1.512840N0000005W (Observatory) Royal Observatory, Greenwich (England: Greater London: Greenwich)