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) (Oceanic basin) "Atlantic Basin" (Atlantic Ocean) (Undersea cordillera) Mid-Atlantic Ridge (Undersea ridge) Reykjanes Ridge "Iceland" (Island) Skrúður (Iceland: Austurland)