An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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gravitational lens equation
  هموگش ِ عدسی ِ گرانشی  
hamugeš-e adasi-ye gerâneši
Fr.: équation de lentille gravitationnelle  

The main equation of gravitational lens theory that sets a relation between the angular position of the point source and the observable position of its image.

See also: → gravitational; → lens; → equation.