An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

Homepage  Preliminaries  Abbreviations  Acknowledgments  References 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
precession of the equator
  پیشایان ِ هموگار  
pišâyân-e hamugâr
Fr.: précession de l'équateur  

That component of general precession caused by the combined effect of the Moon, the Sun and the planets on the equatorial protuberance of the Earth, producing a westward motion of the equinoxes along the ecliptic about 50’’ per year.
According to an IAU resolution adopted in August 2006, the present terminology replaces lunisolar precession.

See also: → precession; → equator.