# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 6 Search : gravitational constant
 Einstein's gravitational constant   پایای ِ گرانشی ِ اینشتین   pâyâ-ye gerâneši-ye Einstein (#)Fr.: constante gravitationnelle d'Einstein   The coupling constant appearing in → Einstein's field equations, expressed by: κ = 8πG/c4, where G is the Newtonian → gravitational constant and c the → speed of light.→ einstein; → gravitational; → constant. Gaussian gravitational constant   پایای ِ گرانشی ِ گاؤس   pâyâ-ye gerâneši-ye GaussFr.: constante gravitationnelle de Gauss   The constant, denoted k, defining the astronomical system of units of length (→ astronomical unit), mass (→ solar mass), and time (→ day), by means of → Kepler's third law. The dimensions of k2 are those of Newton's constant of gravitation: L 3M -1T -2. Its value is: k = 0.01720209895.→ Gaussian; → gravitational; → constant. 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. heliocentric gravitational constant   پایای ِ گرانشی هورمرکزی   pâyâ-ye gerâneši-ye hur-markaziFr.: constante gravitationnelle héliocentrique   A parameter representing the product of the → gravitational constant by the → solar mass. It is 13.27 x 1019 m3 s-2.→ heliocentric; → gravitational; → constant. selenocentric gravitational constant   پایای ِ گرانشی ماه‌مرکزی   pâyâ-ye gerâneši-ye mâh-markaziFr.: constante gravitationnelle sélénocentrique   A parameter representing the product of the → gravitational constant by the → lunar mass. It is 49.03 x 1011 m3 s-2.→ selenocentric; → gravitational; → constant. terrestrial gravitational constant   پایای ِ گرانشی زمینی   pâyâ-ye gerâneši-ye zaminiFr.: constante gravitationnelle terrestre   A parameter representing the product of the → gravitational constant by the Earth's mass. It is 3.987 x 1014 m3s-2 or 3.987 x 105 km3s-2.→ terrestrial; → gravitational; → constant.