Solar and Extrasolar Planet Taxonomy

A mass-based definition for planets is proposed with dynamical circumstances and compositional characteristics used to define types of planets. Dynamical planet classes include Principal planets, Belt planets, Moons, and Rogue planets. Compositional classes include rock, ice, and gas planets with refined classes when sufficient data is available. The dynamical and compositional definitions are combined with a six class planetary mass scale into a taxonomy that can be used to classify both Solar System and extrasolar planets. This taxonomy can be applied to spherical sub-stellar mass bodies with masses ranging from 3.75 x 10^19 kg to 8.08 x 10^28 kg.