An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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SB2 binary
  درین ِ SB2  
dorin-e SB2
Fr.: binaire SB2  

Same as → double-lined binary.

See also: SB, for → spectroscopic binary; 2, for → double-lined; → binary.