An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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background radiation
  تابش ِ پس-زمینه، ~ زمینه  
tâbeš-e paszaminé, ~ zaminé
Fr.: rayonnement du fond  

The isotropic residual microwave radiation in space left from the primordial → Big Bang. Same as
→ cosmic microwave background (CMB) radiation.

See also: → background; → radiation.