Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Caelum veter. - region of the fixed stars
         (Constellation) Gemini veter. - Gem
           (Star system) α Geminorum - Castor
             073436.0+315318 (Star) α Geminorum A
             073436.0+315319 (Star) α Geminorum B