#nadir  the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected
  exclusion:  #zenith
  supertype:  #celestial_point  a point in the heavens (on the celestial sphere)
  part of:  #celestial_sphere__celestialsphere__sphere__empyrean__firmament__heaven__vault_of_heaven__welkin  the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

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