An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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gravitational constant
  پایای ِ گرانشی  
pâyâ-ye gerâneši (#)
Fr.: constante gravitationnelle  

A fundamental constant that appears in → Newton’s law of gravitation. It is the force of attraction between two bodies of unit mass separated by unit distance:
G = 6.673 x 10-8 dyn cm2 g-2 or 6.673 x 10-8 cm3s-2g-1, or 6.673 x 10-11 N m2 kg-2 or
6.673 x 10-11 m3s-2kg-1. It was first measured in 1798 by Henry Cavendish (1731-1810), 71 years after Newton’s death. Same as the → Newtonian constant of gravitation.

See also: → gravitational; → constant.