An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Hale's law
  قانون ِ هیل  
qânun-e Hale
Fr.: loi de Hale  

The leader and → follower spots have opposite polarities on either side of the equator. This reverses after the ~11 year
→ solar cycle. Also called Hale-Nicholson’s law.

See also: Named after George Ellery Hale (1868-1938), American astronomer;
→ law.