#magnetic_field__magnetic_flux__flux  the lines of force surrounding a permanent magnet or a moving charged particle
  supertype:  field_of_force__field__force_field__forcefield  the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it
  subtype:  magnetosphere  the magnetic field of a planet; the volume around the planet in which charged particles are subject more to the planet's magnetic field than to the solar magnetic field
  subtype:  solar_magnetic_field  the magnetic field of the sun

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