An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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pre-main sequence binary
  درین ِ پیش-رشته‌ی ِ فریست  
dorin-e piš-rešte-ye farist
Fr.: binaire pré-séquence principale Markarian's Chain  

A → binary system whose components are → pre-main sequence stars.

See also: → pre-; → main sequence; → binary.