vernal-equinox year — An Etymological Dictionary of Astronomy and Astrophysics

vernal-equinox year

سال ِ هموگان ِ بهاری

sâl-e hamugân-e bahâri

Fr.: année d'équinoxe vernal, année vernale

The time interval between two successive passages of the Sun, when the true longitude of the Sun is considered.
In other words, the interval during which the Sun’s true longitude increases by 360 degrees. Its mean length for the epoch J2000.0 is 365.24236460 real solar days (approximately 365.2424 days). The vernal-equinox year, on which the Iranian calender is based, should not be confused with → tropical year. See also: A concise review of the Iranian calendar. → Iranian calendar

See also: → vernal; → equinox; → year.

An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک