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) "interior" (Earth)
                                   1 (Sphere) crust
                                   2 (Sphere) Mohorovicic discontinuity
                                   3 (Sphere) mantle
                                   4 (Sphere) core–mantle boundary
                                   5.1 (Sphere) outer core
                                   5.2 (Sphere) Lehmann discontinuity
                                   5.3 (Sphere) inner core