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) "surface" (Earth) (Continent) Afro-Eurasia (Continent) Eurasia (Continent) Europe "Greece" (Europe; coast) (Archipelago) Cyclades (Greece: Kykládes) (Island) Nísos Thíra (Greece: Kykládes) (Volcano) ‡Thera volcano (Nísos Thíra) p Phenomenon eruptions (Thera volcano)