An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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ZZ Ceti star
  ستاره‌ی ِ ZZ-کتوس  
setâre-ye ZZ Ketus
Fr.: étoile de type ZZ Ceti  

A member of a class of non-radially pulsating stas that change their brightnesses with periods from 30 seconds to 25 minutes and amplitudes from 0.001 to 0.2 mag in V. Their location on the
→ Hertzsprung-Russell diagram identifies them as → white dwarf stars that have entered the → instability strip as they evolve along the white dwarf track.

See also: → Cetus; → star.