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Equator
Nations that touch the Equator (red) and the Prime Meridian (blue)
.The Equator is the intersection of the Earth's surface with the plane perpendicular to the Earth's axis of rotation and containing the Earth's center of mass.^ 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.

.In simpler language, it is an imaginary line on the Earth's surface equidistant from the North Pole and South Pole that divides the Earth into a Northern Hemisphere and a Southern Hemisphere.^ 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 equators of other planets and astronomical bodies are defined analogously.^ 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.

Contents

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 40,075.16 kilometres (24,901.5 mi).^ 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.)
.The Equator is one of the five main circles of latitude on Earth (the others being the Arctic and Antarctic Circles and the Tropics of Cancer and Capricorn).^ 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. .The imaginary circle obtained when the Earth's equator is projected onto the sky is called the celestial equator.^ 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.

.The Sun in its seasonal movement through the sky, passes directly over the Equator twice each year, on the March and September equinoxes.^ 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]

.At the Equator, the rays of the sun are perpendicular to the surface of the earth on these dates.^ 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 .

The Equator marked as it crosses Ilhéu das Rolas, in São Tomé and Príncipe
Places on the Equator experience the quickest rates of sunrise and sunset in the world. .They are also the only places in the world where the sun can go directly from the zenith to the nadir and from the nadir to the zenith.^ 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]

.Such places also have a theoretical constant 12 hours of day and night throughout the year, though in practice there are variations of a few minutes due to the effects of atmospheric refraction and because sunrise and sunset are measured from the time the edge of the Sun's disc is on the horizon, rather than its centre.^ 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. .It has an average diameter of 12,750 kilometres (7,922 mi), but at the Equator the diameter is approximately 43 kilometres (27 mi) greater than the polar diameter.^ 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).

A monument marking the Equator at the city of Pontianak, Indonesia
.Locations near the Equator are good sites for spaceports, such as the Guiana Space Centre in Kourou, French Guiana, as they are already moving faster than any other point on the Earth due to the Earth's rotation, and the added velocity reduces the amount of fuel needed to launch spacecraft.^ 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 "Marco Zero" in Macapá, Brasil.
.Near the Equator there is little distinction between summer, winter, autumn or spring.^ 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]

.Temperatures are high year round (permanent "summer"), with the exception of periods during the wet season and at higher altitudes.^ 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 .
  • Publications about 'equator' 23 January 2010 16:34 UTC www.soest.hawaii.edu [Source type: Academic]

^ 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]

.In many tropical regions people identify two seasons: wet and dry.^ 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]

.However, most places close to the Equator are wet throughout the year, and seasons can vary depending on a variety of factors including elevation and proximity to an ocean.^ 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]

.The rainy and humid conditions mean that the equatorial climate is not the hottest in the world.^ 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 mostly ocean.^ 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 this point and its immediate vicinity form the only section of the Equator where snow lies on the ground.^ 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

.The Equator traverses the land and/or territorial waters of 14 countries.^ 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:
Co-ordinates Country, territory or sea Notes
0°0′N 0°0′E / 0°N 0°E / 0; 0 (Prime Meridian) Atlantic Ocean Gulf of Guinea
0°0′N 6°31′E / 0°N 6.517°E / 0; 6.517 (São Tomé and Príncipe)  São Tomé and Príncipe Ilhéu das Rolas
0°0′N 6°31′E / 0°N 6.517°E / 0; 6.517 (Atlantic Ocean) Atlantic Ocean Gulf of Guinea
0°0′N 9°21′E / 0°N 9.35°E / 0; 9.35 (Gabon)  Gabon
0°0′N 13°56′E / 0°N 13.933°E / 0; 13.933 (Republic of the Congo)  Republic of the Congo
0°0′N 17°46′E / 0°N 17.767°E / 0; 17.767 (Democratic Republic of the Congo)  Democratic Republic of the Congo
0°0′N 29°43′E / 0°N 29.717°E / 0; 29.717 (Uganda)  Uganda
0°0′N 13°22′E / 0°N 13.367°E / 0; 13.367 (Lake Victoria) Lake Victoria Passing through some islands of  Uganda
0°0′N 34°0′E / 0°N 34°E / 0; 34 (Kenya)  Kenya
0°0′N 41°0′E / 0°N 41°E / 0; 41 (Somalia)  Somalia
0°0′N 42°53′E / 0°N 42.883°E / 0; 42.883 (Indian Ocean) Indian Ocean Passing between Huvadhu atoll and Fuvahmulah island of the  Maldives
0°0′N 98°12′E / 0°N 98.2°E / 0; 98.2 (Indonesia)  Indonesia The Batu Islands, Sumatra and the Lingga Islands
0°0′N 104°34′E / 0°N 104.567°E / 0; 104.567 (Karimata Strait) Karimata Strait
0°0′N 109°9′E / 0°N 109.15°E / 0; 109.15 (Indonesia)  Indonesia Borneo
0°0′N 117°30′E / 0°N 117.5°E / 0; 117.5 (Makassar Strait) Makassar Strait
0°0′N 119°40′E / 0°N 119.667°E / 0; 119.667 (Indonesia)  Indonesia Sulawesi
0°0′N 120°5′E / 0°N 120.083°E / 0; 120.083 (Gulf of Tomini) Gulf of Tomini
0°0′N 124°0′E / 0°N 124°E / 0; 124 (Molucca Sea) Molucca Sea
0°0′N 127°24′E / 0°N 127.4°E / 0; 127.4 (Indonesia)  Indonesia Kayoa and Halmahera islands
0°0′N 127°53′E / 0°N 127.883°E / 0; 127.883 (Halmahera Sea) Halmahera Sea
0°0′N 129°20′E / 0°N 129.333°E / 0; 129.333 (Indonesia)  Indonesia Gebe Island
0°0′N 129°21′E / 0°N 129.35°E / 0; 129.35 (Pacific Ocean) Pacific Ocean Passing just north of Waigeo island,  Indonesia
Passing just south of Aranuka atoll,  Kiribati
Passing just south of Baker Island, United States United States Minor Outlying Islands
0°0′N 91°35′W / 0°N 91.583°W / 0; -91.583 (Ecuador)  Ecuador Isabela Island in the Galápagos Islands
0°0′N 91°13′W / 0°N 91.217°W / 0; -91.217 (Pacific Ocean) Pacific Ocean
0°0′N 80°6′W / 0°N 80.1°W / 0; -80.1 (Ecuador)  Ecuador
0°0′N 75°32′W / 0°N 75.533°W / 0; -75.533 (Colombia)  Colombia
0°0′N 70°3′W / 0°N 70.05°W / 0; -70.05 (Brazil)  Brazil Including some islands in the mouth of the Amazon River
0°0′N 49°20′W / 0°N 49.333°W / 0; -49.333 (Atlantic Ocean) Atlantic Ocean
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

.Certain navies, such as the Royal Navy and the US Navy, have a tradition of holding ceremonies on board ship to mark sailors' first crossing of 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. .Milder line-crossing ceremonies, typically featuring King Neptune, are also held for passengers' entertainment on some civilian ocean liners and cruise ships.^ 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. .In 1976 the IAU standardized this radius as 6,378,140 metres (20,925,656 ft), subsequently refined by the IUGG to 6,378,137 metres (20,925,646 ft) and adopted in WGS-84, though the yet more recent IAU-2000 has retained the old IAU-1976 value.^ 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. .This results in the Equator being 0.16% longer than a meridian (as a great circle passing through the two poles).^ 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°.

.The IUGG standard meridian is, to the nearest millimeter, 40,007,862.917 metres (131,259,392.77 ft), one arc minute of which is 1,852.216 metres (6,076.82 ft), explaining the SI standardization of the nautical mile as 1,852 metres (6,076 ft), more than 3 metres (10 ft) short of the geographical mile.^ Pauli's exclusion principle says that there could not be more than one electron in each quantum state.

See also

Notes

  1. ^ 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)

External links


1911 encyclopedia

Up to date as of January 14, 2010

From LoveToKnow 1911

'EQUATOR (Late Lat. aequator, from aequare to make equal), in geography, that great circle of the earth, equidistant from the two poles, which divides the northern from the southern hemisphere and lies in a plane perpendicular to the axis of the earth; this is termed the "geographical" or "terrestrial equator." In astronomy, the "celestial equator" is the name given to the great circle in which the plane of the terrestrial equator intersects the celestial sphere; it is consequently equidistant from the celestial poles. .The "magnetic equator" is an imaginary line encircling the earth, along which the vertical component of the earth's magnetic force is zero; it nearly coincides with the terrestrial equator.^ The equator is an imaginary line that circles the center of the earth.
  • Equator - Ask.com 23 January 2010 16:34 UTC www.ask.com [Source type: General]

^ The Equator is an imaginary line around the middle of the Earth.
  • What is the Equator from The Fact Train 23 January 2010 16:34 UTC www.facttrain.com [Source type: FILTERED WITH BAYES]

^ The equator is an imaginary line on the Earth's surface equidistant from the North Pole and South Pole.



Wiktionary

Up to date as of January 15, 2010

Definition from Wiktionary, a free dictionary

See also equator

Contents

English

Alternative forms

Proper noun

Singular
Equator
Plural
-
Equator
  1. The Earth’s equator.

Anagrams


Simple English

File:World map with
Map of Earth showing the equator and other major lines of latitude

The equator is a line which is not real drawn around a sphere or planet, such as the Earth. It is one of the lines known as a line of latitude, or circle of latitude. The name "equator" is Latin language and means "even-maker"; at equator the day and night are exactly the same length around the year.

The equator is halfway between the North Pole and the South Pole. There, the surface of the planet is parallel to the axis of rotation. The equator divides the surface into the Northern Hemisphere and the Southern Hemisphere.

Climate

Unlike the Northern Hemisphere and the Southern Hemisphere, countries around the equator do not experience the four seasons, and the climate is usually very humid.

Other pages

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Citable sentences

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