An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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radiant drift
  دلک ِ تابسر  
delek-e tâbsar
Fr.: dérive de radiant  

The apparent slow motion of the → radiant of a → meteor shower from night to night against the background stars due to the Earth moving in its orbit around the Sun.

See also: → radiant; → drift.