An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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dust settling
  نیاشش ِ غبار  
niyâšeš-e qobâr
Fr.: dépose de poussières  

A process occurring in → protoplanetary disks whereby relatively large → dust grains settle to the disk midplane.
These grains, with sizes from → micron to → millimeter, grow from smaller dust grains and will eventually give rise to a planetary system.

See also: → dust; → settling.