celestial longitude

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• celestial longitude — n. Astron. the arc of the ecliptic measured eastward from the vernal equinox to the point where the ecliptic is intersected by the great circle through the star, planet, etc. and the poles of the ecliptic …   English World dictionary

• celestial longitude — The celestial longitude of a body is the arc of the ecliptic contained between the first point of Aries and the secondary ecliptic through that body measured eastward from Aries. It is the angular distance along the ecliptic from the vernal… …   Aviation dictionary

• celestial longitude — noun (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours… …   Useful english dictionary

• celestial longitude — Astron. the angular distance of a point on the celestial sphere from the great circle that is perpendicular to the ecliptic at the point of the vernal equinox, measured through 360° eastward parallel to the ecliptic. * * * …   Universalium

• celestial longitude — /səˌlɛstiəl ˈlɒŋgətjud/ (say suh.lesteeuhl longguhtyoohd) noun → longitude (def. 2a) …   Australian English dictionary

• celestial longitude — noun Astronomy the angular distance of a point east of the First Point of Aries, measured along the ecliptic …   English new terms dictionary

• Celestial meridiator — is a vertical imaginary line that goes over the celestial poles and crosses (perpendicular to) the celestial equator. There are two celestial meridiators on the celestial sphere: Equinox meridiator and Solstice meridiator.NameThe meridiators are… …   Wikipedia

• Longitude by chronometer — Longitude by Chronometer, known by mariners as Long by Chron , is an astronomical navigation method of calculating an observer s position on earth. The method gives the observer a position line on which the observer is situated. Usually the… …   Wikipedia

• longitude — [län′jə to͞od΄, län′jətyo͞od΄; lôn′jə to͞od΄, lôn′jə tyo͞od΄] n. [ME < L longitudo < longus, LONG1] 1. length 2. distance east or west on the earth s surface, measured as an arc of the equator (in degrees up to 180° or by the difference in… …   English World dictionary

• Longitude — For Dava Sobel s book about John Harrison, see Longitude (book). For the adaptation of Sobel s book, see Longitude (TV series). Map of Earth Longitude (λ) Lines of longitude appear vertical with varying curvature in this projection, but are… …   Wikipedia

• longitude — Synonyms and related words: Antarctic Zone, Arctic Circle, Arctic Zone, Cartesian coordinates, Frigid Zones, Lambert conformal projection, Mercator projection, Miller projection, Torrid Zone, Tropic of Cancer, Tropic of Capricorn, Variable Zones …   Moby Thesaurus