From Wikipedia, the free encyclopedia
.^ The intersection of the surface of a body with a plane perpendicular to the body's axis of rotation.- equator Facts, information, pictures | Encyclopedia.com articles about equator 23 January 2010 16:34 UTC www.encyclopedia.com [Source type: FILTERED WITH BAYES]
^ The surface of the Earth at the equator is mainly ocean.
^ The great circle on the surface of a body formed by the intersection of the surface with the plane passing through the center of the body perpendicular to the axis of rotation.
.^ The equator is an imaginary circle around the earth, halfway between the North and South Poles.
^ This geographic, or terrestrial, Equator divides the Earth into the Northern and Southern hemispheres and forms the imaginary reference line on the Earth’s surface from which latitude is reckoned; in other words, it is the line with 0° latitude.- Equator (geography) -- Britannica Online Encyclopedia 23 January 2010 16:34 UTC www.britannica.com [Source type: FILTERED WITH BAYES]
^ The equator divides the planet into a Northern Hemisphere and the Southern Hemisphere.
.^ The following are some people associated with "Equator" Ruggero Giuseppe Boscovich (Italian astronomer and mathematician) Other .- Equator (geography) -- Britannica Online Encyclopedia 23 January 2010 16:34 UTC www.britannica.com [Source type: FILTERED WITH BAYES]
^ On December 21st in the year 2012, we have a straight shot—a linear shot, unobstructed by any other planets or any other bodies in the solar system--where we have direct access to that field of energy.- FairfieldLife : Message: The Science Behind 2012 - Interview with Gregg Braden 23 January 2010 16:34 UTC groups.yahoo.com [Source type: FILTERED WITH BAYES]
^ Equator: Encyclopedia - Equator The equator is an imaginary circle drawn around a planet (or other astronomical object) at a distance halfway between the poles.
Geodesy of the Equator
Road sign marking the Equator near
Nanyuki, Kenya
The
latitude of the Equator is 0°.
.^ The length of Earth's equator is about 40,075.0 km, or 24,901.5 miles.
^ Equator facts: • The equator runs for 40,075 km, or 24,901.5 miles, which is longer than the circumference at the poles (40,008 km).
^ The equator, which measures c.24,902 mi (40,076 km), is designated as lat.- equator Facts, information, pictures | Encyclopedia.com articles about equator 23 January 2010 16:34 UTC www.encyclopedia.com [Source type: FILTERED WITH BAYES]
(See also
"Exact length", below.)
.^ This geographic, or terrestrial, Equator divides the Earth into the Northern and Southern hemispheres and forms the imaginary reference line on the Earth’s surface from which latitude is reckoned; in other words, it is the line with 0° latitude.- Equator (geography) -- Britannica Online Encyclopedia 23 January 2010 16:34 UTC www.britannica.com [Source type: FILTERED WITH BAYES]
^ The equator is an imaginary circle around the earth, halfway between the North and South Poles.
^ Each planet moves in a circle, the center of which moves in a circle of larger radius, and so on, the largest circles being centered on the earth.
It is the only line of latitude which is also a
great circle.
.^ This geographic, or terrestrial, Equator divides the Earth into the Northern and Southern hemispheres and forms the imaginary reference line on the Earth’s surface from which latitude is reckoned; in other words, it is the line with 0° latitude.- Equator (geography) -- Britannica Online Encyclopedia 23 January 2010 16:34 UTC www.britannica.com [Source type: FILTERED WITH BAYES]
^ Equator: Encyclopedia - Celestial equator The celestial equator is a great circle on the imaginary celestial sphere, which is actually the plane of the terrestrial equator extended out into the universe (i.e., it could be constructed by extrapolating the Earth's equator until it touches the celestial sphere).
^ In between is the great circle of the horizon , which is the circle on the celestial sphere cut by a plane tangent to the Earth at your feet.
.^ That equator is a hell of a thing, passing through Brazil, Colombia and Ecuador, yet NOT passing through Peru.- Can you name the countries that lie on the Equator and the Prime Meridian? - sporcle 23 January 2010 16:34 UTC www.sporcle.com [Source type: FILTERED WITH BAYES]
^ The plane of the equator passes through the body's centre and divides the body into northern and southern hemispheres.- equator Facts, information, pictures | Encyclopedia.com articles about equator 23 January 2010 16:34 UTC www.encyclopedia.com [Source type: FILTERED WITH BAYES]
^ When the Sun lies in its plane, day and night are everywhere of equal length, a twice-per-year occurrence known as equinox .- Equator (geography) -- Britannica Online Encyclopedia 23 January 2010 16:34 UTC www.britannica.com [Source type: FILTERED WITH BAYES]
.^ The surface of the Earth at the equator is mainly ocean.
^ This geographic, or terrestrial, Equator divides the Earth into the Northern and Southern hemispheres and forms the imaginary reference line on the Earth’s surface from which latitude is reckoned; in other words, it is the line with 0° latitude.- Equator (geography) -- Britannica Online Encyclopedia 23 January 2010 16:34 UTC www.britannica.com [Source type: FILTERED WITH BAYES]
^ On these dates, the Sun has a declination of 0°, rises exactly east, sets exactly west, is up for 12 hours and down for 12 hours, hence the term equinox .
Places on the Equator experience the quickest rates of
sunrise and
sunset in the world.
.^ Above your head is your zenith , while directly below you is your nadir (both of which are points on the celestial sphere).
^ Although they only account for about 2% of the surface of the planet, rainforests hold the majority of the world’s species.
^ During their brief lifetime in the sun they are visible in satellite images as greenish patches of water, which serve as markers for places where upwelling is bringing nutrients to the surface.- Reports to the Nation: El Nino and Climate Prediction 23 January 2010 16:34 UTC www.atmos.washington.edu [Source type: FILTERED WITH BAYES]
.^ Days gradually become longer than 12 hours, nights shorter.
^ Most equitorial locations have a dry season and a wet season. The amount of sunlight the equator receives is relatively constant throughout the year, but the seasonal affect farther north and south do affect the equator.- Are there seasons at the equator? 23 January 2010 16:34 UTC askville.amazon.com [Source type: FILTERED WITH BAYES]
^ In addition, upward refraction by the Earth's atmosphere and the finite angular diameter of the Sun renders the equinox day a bit longer than 12 hours, night a bit shorter, all the while ignoring twilight.
The Earth
bulges slightly at the Equator.
.^ At a mounting height of 12 ft., The Equator will heat an area of approximately 12ft.- The Equator - Gas Fired Radiant Patio Heater 23 January 2010 16:34 UTC www.easyradiantworks.com [Source type: FILTERED WITH BAYES]
^ Miami is farther (at a greater distance) from the equator than Honolulu.- Do you think our grammar as a nation needs to go into rehab? 23 January 2010 16:34 UTC askville.amazon.com [Source type: General]
^ Northern hemisphere days now get shorter (less than 12 hours), nights longer (greater than 12 hours).
.^ Most equitorial locations have a dry season and a wet season. The amount of sunlight the equator receives is relatively constant throughout the year, but the seasonal affect farther north and south do affect the equator.- Are there seasons at the equator? 23 January 2010 16:34 UTC askville.amazon.com [Source type: FILTERED WITH BAYES]
^ Because kinetic energy depends on both a star's mass and its velocity, high-mass stars must move more slowly than low-mass stars, if equipartition of energy prevails.
^ Besides the similarity in the name, the other reason the landmark is located here is because a French expedition in 1736 led by Charles-Marie de La Comdamine did measurements at the spot marked by the landmark that it is in fact the location of the Equator.- The Equator : Quito, Ecuador 2004 23 January 2010 16:34 UTC www.gagme.com [Source type: FILTERED WITH BAYES]
Spacecraft launched in this manner must launch to the east to use this effect.
For high precision work, the Equator is not quite as fixed as the above discussion implies. The true equatorial plane must always be perpendicular to the Earth's spin axis. Although this axis is relatively stable, its
position wanders in an approximately 9 metres (30 ft) radius circular motion each year. Thus, the true equator moves slightly, but this effect is only relevant to detailed scientific studies.
Equatorial seasons and climate
.^ The Front moves toward > the equator with the average winter position at approximately 38N. In > the summer the dome shrinks and the Front migrates away from the > equator to an average summer position of about 65N. These are > average positions and are affected by the difference of heating and > cooling between land and water.- Climate Misinformation and Contradictions Continue - sci.environment | Google Groups 23 January 2010 16:34 UTC groups.google.com [Source type: FILTERED WITH BAYES]
^ The ""gentlemen of the press"" find there is no class distinction among pollywogs, during a crossing the equator ceremony on the U. S. S. Missouri.- Missouri Digital Heritage : Collection : Search Results 23 January 2010 16:34 UTC cdm.sos.mo.gov [Source type: FILTERED WITH BAYES]
^ "Not in the same way most of us view Summer, Autumn, Winter, and Spring" .- Are there seasons at the equator? 23 January 2010 16:34 UTC askville.amazon.com [Source type: FILTERED WITH BAYES]
.^ Most equitorial locations have a dry season and a wet season. The amount of sunlight the equator receives is relatively constant throughout the year, but the seasonal affect farther north and south do affect the equator.- Are there seasons at the equator? 23 January 2010 16:34 UTC askville.amazon.com [Source type: FILTERED WITH BAYES]
^ Part 2: role of long equatorial wave reflection on sea surface temperature anomalies during the 1993-1998 TOPEX/POSEIDON period .
^ Rice thrives in wet conditions during the growing season followed by drier conditions during the ripening phase.- Reports to the Nation: El Nino and Climate Prediction 23 January 2010 16:34 UTC www.atmos.washington.edu [Source type: FILTERED WITH BAYES]
.^ What we had were the wet season and dry season.- Are there seasons at the equator? 23 January 2010 16:34 UTC askville.amazon.com [Source type: FILTERED WITH BAYES]
^ Equator: Encyclopedia II - Equator - Equatorial climate In many tropical regions people identify two seasons, wet and dry, but most places very close to the equator are wet throughout the year, although seasons can vary depending on a variety of factors including elevation and proximity to an ocean.
^ Most equitorial locations have a dry season and a wet season. The amount of sunlight the equator receives is relatively constant throughout the year, but the seasonal affect farther north and south do affect the equator.- Are there seasons at the equator? 23 January 2010 16:34 UTC askville.amazon.com [Source type: FILTERED WITH BAYES]
.^ Equator: Encyclopedia II - Equator - Equatorial climate In many tropical regions people identify two seasons, wet and dry, but most places very close to the equator are wet throughout the year, although seasons can vary depending on a variety of factors including elevation and proximity to an ocean.
^ Most equitorial locations have a dry season and a wet season. The amount of sunlight the equator receives is relatively constant throughout the year, but the seasonal affect farther north and south do affect the equator.- Are there seasons at the equator? 23 January 2010 16:34 UTC askville.amazon.com [Source type: FILTERED WITH BAYES]
^ It depends on how far away you are from the equator, and where the land mass and oceans are positioned. The seasonal changes in the weather north or south of the equator trigger monsoonal rains for part of the year and drought like conditions for part of the year.- Are there seasons at the equator? 23 January 2010 16:34 UTC askville.amazon.com [Source type: FILTERED WITH BAYES]
.^ Information available in early November 1983 indicated that the climatic conditions in the equatorial Pacific were near normal and were likely to remain so through the rainy season, producing favorable conditions for agriculture.- Reports to the Nation: El Nino and Climate Prediction 23 January 2010 16:34 UTC www.atmos.washington.edu [Source type: FILTERED WITH BAYES]
.^ The surface of the Earth at the equator is mainly ocean.
^ EQUATOR The geographic circle at 0 degrees latitude on the earth's surface.- weather.com - Glossary 23 January 2010 16:34 UTC www.weather.com [Source type: FILTERED WITH BAYES]
The highest point on the Equator is 4,690 metres (15,387 ft), at 77°59′31″W, on the south slopes of
Volcán Cayambe (summit 5,790 metres (18,996 ft)) in Ecuador.
.^ This is a short distance above the snow line, and is the only point on the Equator where snow lies on the ground (Google E ...
Equatorial countries and territories
.^ This means the Front is further toward > the equator over the land in winter and further away over the water in > summer (Figure 2).- Climate Misinformation and Contradictions Continue - sci.environment | Google Groups 23 January 2010 16:34 UTC groups.google.com [Source type: FILTERED WITH BAYES]
^ I think Esteban's point is that USA as a country should be included because part of its territory (ie Baker Island) is on the equator.- Can you name the countries that lie on the Equator and the Prime Meridian? - sporcle 23 January 2010 16:34 UTC www.sporcle.com [Source type: FILTERED WITH BAYES]
^ This means the Front is further toward the equator over the land in winter and further away over the water in summer (Figure 2).- Climate Misinformation and Contradictions Continue - sci.environment | Google Groups 23 January 2010 16:34 UTC groups.google.com [Source type: FILTERED WITH BAYES]
Starting at the
Prime Meridian and heading eastwards, the Equator passes through:
Despite its name, no part of
Equatorial Guinea's territory lies on the Equator. However, its island of
Annobón is 155 kilometres (100 mi) south of the Equator, and the rest of the country lies to the north. The country that comes closest to the Equator without actually touching it is
Peru.
Crossing the Equator
.^ The Devil during crossing the Equator ceremony.- Missouri Digital Heritage : Collection : Search Results 23 January 2010 16:34 UTC cdm.sos.mo.gov [Source type: FILTERED WITH BAYES]
^ This is a general view of a crossing the equator ceremony on the U. S. S. Missouri during President Truman's return trip from Brazil.- Missouri Digital Heritage : Collection : Search Results 23 January 2010 16:34 UTC cdm.sos.mo.gov [Source type: FILTERED WITH BAYES]
^ President Harry S. Truman participates in a crossing the equator ceremony on the U. S. S. Missouri, as he returns home from a trip to Bra .- Missouri Digital Heritage : Collection : Search Results 23 January 2010 16:34 UTC cdm.sos.mo.gov [Source type: FILTERED WITH BAYES]
These rites of initiation have in the past been notorious for their brutality.
.^ Captain Robert Dennison reads his summons to his passengers and crew of the U. S. S. Missouri while going through ceremonies for those who had not yet crossed the Equator.- Missouri Digital Heritage : Collection : Search Results 23 January 2010 16:34 UTC cdm.sos.mo.gov [Source type: FILTERED WITH BAYES]
^ Pollywog President Harry S. Truman is the first to be called before ""King Neptune's Court"" during ceremonies initiating passengers and crew aboard the U.S.S. Missouri who had never before crossed th .- Missouri Digital Heritage : Collection : Search Results 23 January 2010 16:34 UTC cdm.sos.mo.gov [Source type: FILTERED WITH BAYES]
^ President Harry S. Truman (center, in white hat), pleads for mercy before ""King Neptune's Court"" during ceremonies initiating passengers and crew aboard the U.S.S. Missouri who had never before cros .- Missouri Digital Heritage : Collection : Search Results 23 January 2010 16:34 UTC cdm.sos.mo.gov [Source type: FILTERED WITH BAYES]
Exact length of the Equator
The Equator is modeled exactly in two widely used standards as a circle of radius an integer number of metres.
.^ Promising higher-dimensional supergravity theory developed in the 1970s, subsequently ignored, and more recently shown to be an important part of string theory.
In either case, the length of the Equator is by definition exactly 2π times the given standard, which to the nearest millimeter is 40,075,016.686 metres (131,479,713.54 ft) in WGS-84 and 40,075,035.535 metres (131,479,775.38 ft) in IAU-1976 and IAU-2000.
[1]The
geographical mile is defined as one arc minute of the Equator, and therefore has different values depending on which standard equator is used, namely 1,855.3248 metres (6,087.024 ft) or 1,855.3257 metres (6,087.027 ft) for respectively WGS-84 and IAU-2000, a difference of nearly a millimeter.
The earth is standardly modeled as a sphere flattened 0.336% along its axis.
.^ The great circle on the surface of a body formed by the intersection of the surface with the plane passing through the center of the body perpendicular to the axis of rotation.
^ [H76] (c) Either of the two points on the celestial sphere at which the ecliptic intersects the celestial equator; also the time at which the Sun passes through either of these intersection points; i.e., when the apparent longitude (see Apparent Place; Longitude, Celestial) of the Sun is 0° or 180°.
.^ Pauli's exclusion principle says that there could not be more than one electron in each quantum state.
See also
Notes
- ^ Although millimeter precision can be important up to the scale of a mile, it has negligible physical significance at the scale of a geographic feature such as the Equator. From a computational standpoint, however, millimeter precision or better can be valuable for maintaining consistent results when used in programs for surveying and other applications that require precise measurements. As an overly simple example, if a program were to convert back and forth between the radius and the circumference of the earth sufficiently often while maintaining precision only to a meter each time, errors might accumulate until they became noticeable.
References
- Moritz, H (September 1980). "Geodetic Reference System 1980". Bulletin Géodésique (Berlin: Springer-Verlag) 54 (3): 395–405. doi:10.1007/BF02521480. (IUGG/WGS-84 data)
- Taff, Laurence G (1981). Computational Spherical Astronomy. New York: Wiley. ISBN 047106257X. OCLC 6532537. (IAU data)
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