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) Jovian System
                             (Moon) Jupiter I (Io) Galilei, 1610
                               01 Active eruptive centers
                               02 Catenae
                               03 Fluctus
                               04 Mensae
                               05 Montes
                               06 Paterae
                               07 Plana
                               08 Regiones
                               09 Tholi
                               10 Valles