An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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TW Hydrae association
  آهزش ِ TW هودرا  
âhazeš-e TW Hudrâ
Fr.: Association TW Hydrae  

A young (≤ 100 million years) association of stars (abbreviated TWA) with at least 27 members,
from → intermediate mass stars to planetary mass objects. Five of them, including → TW Hydrae, display signatures of → T Tauri stars. TWA is the first moving group of young nearby (≤ 100 → paesecs) stars to be identified.

See also: → TW Hydrae; → association.