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
                             (Moon) Earth I (Moon) veter.
                               "history" (Moon)
                                 1 (Period) pre-Nectarian Period (Moon)
                                 2 (Period) Nectarian Period (Moon)
                                 3 (Period) Imbrian Period (Moon)
                                 4 (Period) Procellarian Period (Moon)
                                 5 (Period) Eratosthenian Period (Moon)
                                 6 (Period) Copernican Period (Moon)