An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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binary black hole
  سیه‌چال ِ درین  
siyah câl-e dorin
Fr.: trou noir binaire  

A → binary system consisting of two → black holes in close orbit around each other. Same as → black hole binary.

See also: → binary; → black; → hole.