Individual #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
  instance of:  #extragalactic_nebula
  member:  #Southern_Cross
  part:  #heliosphere  the region inside the heliopause containing the sun and solar system
     part:  #solar_system__solarsystem  the sun with the celestial bodies that revolve around it in its gravitational field
        part:  #interplanetary_medium  interplanetary space including forms of energy and gas and dust
           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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