An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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artificial horizon
  افق ِ ساختگی  
ofoq-e sâxtegi
Fr.: horizon artificiel  

A shallow flat vessel filled with → mercury or some other viscous → liquid used in special → sextant for measuring altitudes of celestial bodies at sea in the absence of a → visible horizon.

See also: → artificial; → horizon.