Longitude prize
The longitude prize was a prize offered by the British government through an Act of Parliament in 1714 for the precise determination of a ship's longitude.
Longitude
The azimuthal position of a point on the surface of a or . The zero point of longitude is usually arbitrarily fixed at a given point (the on ), and longitude is then conventionally specified in the range 180° east to 180° west.
Longitude
On the globe, lines of constant longitude ("meridians") extend from pole to pole, like the segment boundaries on a peeled orange.
The Longitude of Greenwich
The problem: why does a GPS receiver operated on the zero meridian at Greenwich indicate a longitude differing by about 100 metres from zero?
Longitude of Perihelion
The sum of the longitude of the ascending node and the argument of perihelion.
longitude (or geographic ~ to distinguish it from the ecliptic ~): [Î", Î"t, LON] the angular location of a place on the Earth's surface measured east or west of the Prime meridian though Greenwich.
longitude
the angular distance of a particular place on Earth as measured east or west from the prime meridian running through Greenwich, England
long-period comet ...
longitude -- distance on the Earth (measured in degrees) east or west from a reference line, usually the line running between the poles passing through Greenwich, England.
longitude of perihelion:
Orientation of the perihelion of the orbit.
main belt:
Region between Mars and Jupiter inhabited by a large number of asteroids.
Longitude , symbolized by the Greek character lambda , is the geographic coordinate most commonly used in cartography and global navigation for east-west measurement....
, and must be as many degrees to the north of the equator
Equator ...
Longitude of the Ascending Node The angular distance, measured around the reference plane, between the FPA and the ascending node of an orbit.
Longitude: The angular distance East or West, between the meridian of a particular place on Earth and that of Greenwich, England, expressed in degrees or time.
Long-period: In astronomy, a comet with an orbital period greater than 200 years.
Longitude -- Great circles that pass through both the north and south poles, also called meridians.
LOS -- Loss Of Signal, used in DSN operations.
LOX -- Liquid oxygen.
Longitude, Celestial
Angular distance on the celestial sphere measured eastward along the ecliptic from the dynamical equinox to the great circle passing through the poles of the ecliptic and the celestial object.
Longitude, Terrestrial ...
Longitude - The angular distance around the equator of a body from a zero point to the place on the equator nearest a particular point as measured by a hypothetical observer at the center of a body ...
LONGITUDE
Longitude is the angular distance east or west from the north-south line that passes through Greenwich, England, to a particular location. Greenwich, England, has a longitude of zero degrees.
[edit] Longitude
Longitude can be measured in the same way. If one can accurately measure the angle to Polaris, a similar measurement to a star near the eastern or western horizons will provide the longitude.
longitude (,long)
sidereal hour angle (SHI)
right ascension (RA, ),
Greenwich hour angle (GHA),
local hour angle (LHA) ...
longitude - An east-west coordinate on the earth's surface; the angular distance, measured east or west along the equator from the Greenwich meridian, to the meridian passing through a place.
LONGITUDE
Longitude is the angular distance east or west of the prime meridian of a celestial object.
LONG PERIOD COMET
A long period has an orbital period over 200 years. This type of comet may originate from the .
longitude of the perigee at the two epochs gave the annual motion of that element, and the difference of mean longitudes gave the mean motion.
Longitude (see Longitude, Terrestrial) measured eastward from the ephemeris meridian. [S92]
Ephemeris Meridian ...
The Longitude of Perihelion
The perihelion and aphelion are precessing, advancing eastward along the ecliptic about 11 arcseconds per year in relation to the fixed stars.
The longitude problem took centuries to solve. Two useful methods evolved during the 1700s, and are still practiced today: lunar distance, which does not involve the use of a chronometer, and use of an accurate timepiece, or chronometer.
"The longitudes of a large number of spots were derived from these drawings by estimation, ...
Just as longitude and latitude allow us to locate a point on Earth's surface, right ascension and declination specify locations on the sky.
At some longitudes the observer probably would see the Sun rise and then gradually increase in apparent size as it slowly moved toward the zenith.
Celestial longitude
Angle measured eastward along the ecliptic from the vernal equinox to foot of the circle perpendicular to ecliptic and passing through the object.
Ls -- Longitude of the Sun is measured eastward in the planet's orbital plane from Mars’ Northern Hemisphere vernal equinox. (Also referred to Areocentric Longitude).
Libration of longitude, the Moon's east-west wobble, is a product of the Moon's elliptical (elongated) orbit.
It has a zero longitude that runs from the North Pole, through England, through Spain, down through the west side of Africa where is passes the Equator and then continues all the way down to Antarctica and the South Pole.
ACTIVE LONGITUDE. The approximate center of a range of heliographic longitudes in which ACTIVE REGIONS are more numerous and more FLARE-active than the average. ACTIVE PROMINENCE.
longitude used to specify position on the Earth, it is the number of degrees east or west of the 0° line going through Greenwich, England. luminosity the total amount of energy radiated by an object every second.
Analogous to the longitude coordinate here on Earth, RA is also an angular distance, measured eastward from the vernal equinox (where the celestial equator intersects the ecliptic).
Ninety degrees of longitude, as measured along the equator, is the equivalent of about 6,225 miles. So as the bird flies, the distance from the Congo to Columbia (15 degrees E. longitude to 75 degrees W. longitude) lies some 6,225 miles away.
parallactic inequality A secondary effect in the solar perturbations in the moon's longitude due to the ellipticity of the earth's orbit.
See also: Meteor, Solar longitude, Trajectory Meteorite A natural object of extraterrestrial origin (meteoroid) that survives passage through the atmosphere and hits the ground.
It is a mechanical device for finding the longitudes and positions of the Moon, Sun, and planets, without calculation using a geometrical model to represent the celestial body's mean and anomalistic position.
Planisphere ...
One element of the astronomical coordinate system on the sky, which can be though of as longitude on the earth projected onto the sky.
The Caloris Basin--so named because it occurs at one of the "hot" (Latin: calor) longitudes described earlier--is about 1,300 kilometres in diameter (Figure 13).
The star is far better known by its Greek letter name Nu Draconis, the western one of the pair Nu-1, the eastern one Nu-2 (the numbers, when applied, always going east to west in order of increasing right ascension, the "longitude" of the sky).
Pickering's different elements for planet O were: Mean dist Period Mass Magnitude Node Incl Longitude 1908 51.9 373.5 y 2 earth's 11.5-13.4 105.13 1919 55.1 409 y 15 100 15 1928 35.23 209.2 y 0.
Its original purpose was to provide the astronomical information necessary to derive longitude at sea. In 1852 the U.S.
The celestial equivalent of longitude is called right ascension. Right ascension can be measured in degrees, ...
Ptolemy measured the longitudes of Regulus, Spica, and other bright stars with a variation of Hipparchus' lunar method that did not require eclipses. Before sunset, he measured the longitudinal arc separating the Moon from the Sun.
Right Ascension is similar to longitude on the Earth, however it is numbered differently. Longitude starts at 0 degrees at the Prime Meridian and goes to 180 degree East or 180 degrees West. Since the Earth is a sphere, 180 E is equal to 180 W.
This complex terrain on Jupiter's moon, Europa, shows an area centered at 12 degrees north latitude, 274 degrees west longitude, in the trailing hemisphere.
His main contribution was to apply rigorous mathematical principles to the determination of places on the Earth's surface, and he was the first to do so by specifying their longitude and latitude--the method used today.
Three coordinates—latitude, longitude, and altitude—suffice for locating all such features.
Declination: One of two coordinates for the celestial sphere, which are analogous to latitude and longitude for the Earth's surface. The declination of an object is how many degrees it is north or south of the celestial equator.
In the ecliptic system, latitude is measured with respect to the ecliptic plane and position is measured by ecliptic latitude (elat) and ecliptic longitude (elon). Both ecliptic latitude and longitude are measured in degrees.
The right ascension is different from the longitude. Instead of running from -180° to +180° like the longitude, the right ascension runs from 0 hour to 24 hours from west to east.
We used latitude for the North-South system, so let's see if we can do the same with longitude for the East-West coordinates.
These goals were to be carried out from a near-circular lunar orbit and on the lunar surface at 3° S latitude, 17° W longitude. Although the planned mission objectives were not realized, a limited amount of photographic data was obtained.
A Dictionary of Astronomy entry for ecliptic longitude
A Dictionary of Astronomy entry for ecliptic latitude
A Dictionary of Astronomy entry for ecliptic coordinates
The Concise Oxford Dictionary of English Etymology entry for ecliptic ...
The coordinates are centered on Earth as with equatorial coordinates, but the origin of galactic longitude and latitude are coincident with the center of the Galaxy, the longitudinal direction is along the galactic plane, ...
Al igual que el Telescopio Espacial Spitzer, el Webb podrá ver el Universo en longitudes de onda que no pueden ser alcanzadas por el ojo humano. Web observará luz infrarroja.
Pero una elipse tiene diámetros de diversas longitudes. El más largo se llama el eje mayor, y el más corto es el eje menor. El radio de estas dos longitudes determina la excentricidad (e) de la elipse; mide cuán elíptica es.
Before this, zero degrees longitude would vary on different maps, but thanks to British dominance of the seas and the important work that the Royal Observatory had done since its founding by Charles II in 1675 it became the location of the ...
I am reading Sobel's Longitude , and she speaks of the Earth's rotation rate slowing as a result of tidal forces. At what rate is the Earth's rotation slowing down? What will be the result of this slowing, and how long will it take?
The Answer ...
 See also: Earth, Time, Sun, Latitude, Planet
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