#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:  #interplanetary_dust  #interplanetary_gas  #solar_magnetic_field  #solar_wind
  part of:  #solar_system__solarsystem  the sun with the celestial bodies that revolve around it in its gravitational field
     part of:  #heliosphere  the region inside the heliopause containing the sun and solar system
        part of:  #Milky_Way_Galaxy__Milky_Way__Milky_Way_System  the galaxy containing the solar system; consists of millions of stars that can be seen as a diffuse band of light stretching across the night sky

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