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 (Region) Asteroid Belt (Region) Main Belt (Region) "Main-belt II" (2.50 AU < a ≤ 2.82 AU) (Region) Ceres Region (Dwarf planet) (1) Ceres G. Piazzi, 1801