An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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black hole surface gravity
  گرانی ِ رویه‌ی ِ سیه‌چال  
gerâni-ye ruye-ye siyah câl
Fr.: gravité de surface de trou noir  

The acceleration of gravity at the → event horizon of a → black hole. For a → Schwarzschild back hole it is given by κ = GM/RSch2 = c4/(4GM).

See also: → black; → hole; → surface; → gravity.