Natura - nature actualia - actual entities Mundus Plinius - physical world Caelum veter. - region of the fixed stars (Constellation) Sagittarius Cleostratus, 6th century BC - Sgr (Planetary system) OGLE-2006-BLG-109L system B.S. Gaudi et al., 2008 (Planet) OGLE-2006-BLG-109Lb B.S. Gaudi et al., 2008