#interplanetary_medium  interplanetary space including forms of energy and gas and dust
  supertype:  interplanetary_space  the part of outer space within the solar system
  part of:  solar_system
  part:  interplanetary_dust  microscopic particles in the interplanetary medium
  part:  interplanetary_gas  a rarefied flow of gas and charged particles (plasma) that stream from the sun and form the solar wind
  part:  solar_magnetic_field  the magnetic field of the sun
  part:  solar_wind__solarwind  a stream of protons moving radially from the sun

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