tropical year

tropical year
The period between two successive vernal equinoxes, the time the earth takes to complete one orbit around the sun relative to the first point of Aries. Its length was 365 days 5 h 48 min and 45.19 s in 2000, and it is changing by 0.00000006162 ´ y days (y in Julian years from 2000), or about 5 milliseconds/year. The tropical year differs from the solar year by 1 part in 26,000, since this is the period of the earth’s precession about its rotational axis combined with the precession of the perihelion of the earth’s orbit. Also called an astronomical, equinoctial, natural, or solar year. It contains one complete cycle of seasons.

Aviation dictionary. 2014.

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  • Tropical year — Year Year, n. [OE. yer, yeer, [yogh]er, AS. ge[ a]r; akin to OFries. i?r, g?r, D. jaar, OHG. j[=a]r, G. jahr, Icel. [=a]r, Dan. aar, Sw. [*a]r, Goth. j?r, Gr. ? a season of the year, springtime, a part of the day, an hour, ? a year, Zend y[=a]re… …   The Collaborative International Dictionary of English

  • tropical year — n. see YEAR (sense 2) …   English World dictionary

  • Tropical year — A tropical year (also known as a solar year), for general purposes, is the length of time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox,… …   Wikipedia

  • tropical year — atogrąžiniai metai statusas T sritis fizika atitikmenys: angl. solar year; tropical year vok. tropisches Jahr, n rus. тропический год, m pranc. année tropique, f …   Fizikos terminų žodynas

  • tropical year — year (def. 4b). [1585 95] * * * …   Universalium

  • tropical year — noun the time for the earth to make one revolution around the sun, measured between two vernal equinoxes • Syn: ↑solar year, ↑astronomical year, ↑equinoctial year • Hypernyms: ↑year …   Useful english dictionary

  • tropical year — noun a) The time that it takes for the Sun to return to the same position along the ecliptic, as viewed from the Earth, especially: b) A vernal equinox year, the time between two successive vernal equinoxes. Syn: astronomical year …   Wiktionary

  • tropical year — /trɒpɪkəl ˈjɪə/ (say tropikuhl year) noun See year (def. 5) …  

  • tropical year — noun another term for solar year …   English new terms dictionary

  • tropical year — The interval between two consecutive returns of the sun to the vernal equinox …   Ballentine's law dictionary

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