Longitude (/ˈlɒndʒɪtjuːd/, AU and UK also /ˈlɒŋɡɪ-/) is a geographic coordinate that specifies the east–west position of a point on the surface of the...

measuring and communicating positions directly on Earth as latitude and longitude. It is the simplest, oldest and most widely used of the various spatial...

In celestial mechanics, true longitude is the ecliptic longitude at which an orbiting body could actually be found if its inclination were zero. Together...

history of longitude describes the centuries-long effort by astronomers, cartographers and navigators to discover a means of determining the longitude of any...

celestial mechanics, the longitude of the periapsis, also called longitude of the pericenter, of an orbiting body is the longitude (measured from the point...

Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time is a 1995 best-selling book by Dava Sobel about John...

Mean longitude is the ecliptic longitude at which an orbiting body could be found if its orbit were circular and free of perturbations. While nominally...

celestial body. Longitude may also refer to: Longitude rewards, a British inducement prize for a solution to the longitude problem Longitude (book), by Dava...

The Longitude Act 1714 was an Act of Parliament of Great Britain passed in July 1714 at the end of the reign of Queen Anne. It established the Board of...

The longitude of the ascending node, also known as the right ascension of the ascending node, is one of the orbital elements used to specify the orbit...

ship's longitude at sea. The prizes, established through an Act of Parliament (the Longitude Act) in 1714, were administered by the Board of Longitude. This...

Longitude is a 2000 TV drama produced by Granada Television and the A&E Network for Channel 4, first broadcast between 2 and 3 January 2000 in the UK...

The Cessna Citation Longitude is a business jet produced by Cessna, part of the Cessna Citation family. It remains the largest business jet by Cessna...

The Commissioners for the Discovery of the Longitude at Sea, or more popularly Board of Longitude, was a British government body formed in 1714 to administer...

The Longitude Prize is an inducement prize contest offered by Challenge Works, a social enterprise which was historically part of Nesta, a British lottery...

Longitude Festival is a music festival that takes place during July every year in Dublin, Ireland. Since 2013, Marlay Park has been home to the festival...

Longitude by chronometer is a method, in navigation, of determining longitude using a marine chronometer, which was developed by John Harrison during...

Solar longitude, commonly abbreviated as Ls, is the ecliptic longitude of the Sun, i.e. the position of the Sun on the celestial sphere along the ecliptic...

and west of the prime meridian in a geographical coordinate system. The longitude at this line can be given as either east or west. On Earth, the prime...

it is a coordinate line for longitudes, a line of longitude. The position of a point along the meridian at a given longitude is given by its latitude, measured...

an arbitrarily chosen meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian...

Apparent longitude is celestial longitude corrected for aberration and nutation as opposed to mean longitude. Apparent longitude is used in the definition...

Longitude LLC is the inventor and distributor of the Longitude Enhanced Pari-Mutuel System™, a pool betting technology platform. The Longitude Enhanced...

subject to small periodic oscillations. Ecliptic longitude Ecliptic longitude or celestial longitude (symbols: heliocentric l, geocentric λ) measures...

between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep...

called the International Reference Meridian, is the prime meridian (0° longitude) maintained by the International Earth Rotation and Reference Systems...

The Bureau des Longitudes (French: [byʁo de lɔ̃ʒityd]) is a French scientific institution, founded by decree of 25 June 1795 and charged with the improvement...

(secondary coordinates) The meridian 80° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Indian...

ecliptic longitude β, ecliptic latitude Galactic coordinates l, galactic longitude b, galactic latitude Miscellaneous λo, observer's longitude ϕo, observer's...

equator from the Galactic Center. Analogous to terrestrial longitude, galactic longitude is usually measured in degrees (°). Latitude (symbol b) measures...