An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Oort's constants
  پایاهایِ اورت  
pâyâhâ-ye Oort
Fr.: constantes de Oort  

Two parameters, denoted A and B, that describe the major features of our Galaxy’s differential rotation in the Sun’s neighbourhood. A is one-half of the shear and equal to +14.4 ± 1.2 km s-1 kpc-1, and B, one-half of the vorticity, equal to -12.0 ± 2.8 km s-1 pc-1.

See also: → Oort cloud; → constant.