Natura - nature actualia - actual entities Mundus Plinius - physical world Astra Plinius - celestial bodies Universe Virgo-Hydra-Centaurus Supercluster Virgo Supercluster Local Group Milky Way Galaxy veter. Orion Arm Local Bubble Local Interstellar Cloud Solar System Earth System Earth veter. "spheres" (Earth) Atmosphere (Earth) - layer of air Cyclones 2004 Atlantic hurricane season Alex (31 Jul 2004 - 6 Aug 2004)