#planet  any of the celestial bodies (other than comets or satellites) that revolve around the sun in the solar system
  supertype:  celestial_body__celestialbody__heavenly_body  natural objects visible in the sky
  part:  biosphere
  member of:  solar_system
  subtype:  asteroid__minor_planet__minorplanet__planetoid  any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)
     subtype:  Pallas  a large asteroid; the second asteroid to be discovered
     instance:  Apollo_asteroid  Ceres  Vesta
  subtype:  evening_star__eveningstar__Hesperus__Vesper  a planet (usually Venus) seen at sunset in the western sky
  subtype:  morning_star__morningstar__daystar__phosphoru  a planet (usually Venus) seen just before sunrise in the eastern sky
  subtype:  superior_planet  any of the planets whose orbit lies outside the earth's orbit
     subtype:  Jovian_planet__gas_giant__gasgiant  any of the four outermost planets in the solar system; much larger than Earth and gaseous in nature (like Jupiter)
        instance:  Jupiter  Neptune.Jovian_planet__neptune  Saturn  Uranus
     instance:  Red_Planet__Mars  Pluto
  subtype:  terrestrial_planet__terrestrialplanet  a planet having a compact rocky surface like the Earth's; the four innermost planets in the solar system
     subtype:  inferior_planet  any of the planets whose orbit lies inside the earth's orbit
        instance:  Mercury  Venus
     instance:  Earth.terrestrial_planet__earth__globe  Red_Planet__Mars

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