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) "Arctic Basin" (Arctic Ocean)
                                     1.870000N0800000E (Undersea basin) Eurasia Basin (Arctic Ocean)
                                     1.a [(Topographic basin) Eurasian Basin (Arctic Ocean)] see Undersea basin Eurasia Basin (Arctic Ocean)
                                     2.880000N1400000E (Undersea ridge) Lomonosov Ridge (Arctic Ocean)
                                     3.800000N1700000W (Undersea basin) Amerasia Basin (Arctic Ocean)
                                     3.a [(Topographic basin) Amerasian Basin (Arctic Ocean)] see Undersea basin Amerasia Basin (Arctic Ocean)