The Equator appears on maps and globes. It is the starting point for the measuring system called latitude. Latitude is a system of imaginary east-west lines, called parallels, that circle Earth parallel to the Equator. Parallels are used to measure distances in degrees north or south of the Equator. The latitude of the Equator is zero degrees. Take a minute to check out all the enhancements! Choose a language from the menu above to view a computer-translated version of this page. Please note: Text within images is not translated, some features may not work properly after translation, and the translation may not accurately convey the intended meaning.
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Featured Media. Featured Animal. Changes in Earth axis can also be observed in the geographic layout of volcanic island chains, which are created by shifting hot spots under the Earth's crust as the axis and crust move.
The WGS 84 World Geodetic System which is a standard for use in cartography, geodesy, and satellite navigation including GPSalso has an equatorial radius of 6, The geographical mile is defined as one arc-minute of the equator, so it has different values depending on which radius is assumed. For example, by WSG, the distance is 1, This is a difference of less than one millimetre 0.
The earth is commonly modeled as a sphere flattened 0. This LP) the equator 0. The IUGG standard meridian is, to the nearest millimetre, 40, The sea-level surface of the Earth the geoid is irregular, so the actual length of the equator is not so easy to determine.
The equator passes through the land of 11 countries. Indonesia is the country straddling the greatest length of the equatorial line across both land and sea. Starting at the Prime Meridian and heading eastwards, the equator passes through:. Despite its name, no part of Equatorial Guinea lies on the equator. Seasons result from the tilt of the Earth's axis compared to the plane of its revolution around the Sun. Throughout the year the northern and southern hemispheres are alternately turned either toward or away from the sun depending on Earth's position in its orbit.
The LP) turned toward the sun receives more sunlight and is in summer, while the other hemisphere receives less sun and is in winter see solstice. At the equinoxesthe Earth's axis is perpendicular to the sun rather than tilted toward or away, meaning that day and night are both about 12 hours long across the whole of the Earth.
Near the equator, this means the variation in strength of solar radiation is different relative to the time of year than it is at higher latitudes: Maximum solar radiation is received during the equinoxes, when a place at the equator is under the subsolar point at high noon, and the intermediate seasons of spring and autumn occur at higher latitudes, and the minimum occurs during both solstices, when either pole is tilted towards or away from the sun, resulting in either summer or winter in both hemispheres.
This also results in a corresponding movement of the equator away from the subsolar point, which is then situated over or near the relevant tropic circle. Nevertheless, temperatures are high year round due to the earth's axial tilt of Near the equator there is little temperature change throughout the year, though there may be dramatic differences in rainfall and humidity, LP).
The terms summer, autumn, winter and spring do not generally apply. Lowlands around the equator generally have a tropical rainforest climatealso known as Equator - S. Park* / D. Way* - Challenge The World (Vinyl equatorial climate, though cold ocean currents cause some regions to have tropical monsoon climates with a dry season in the middle of the year, and the Somali LP) generated by the Asian monsoon due to continental heating via the high Tibetan Plateau causes Greater Somalia to have an arid climate despite its equatorial location.
There are about rainy days per year and average annual sunshine hours are around 2, Despite high year-round sea level temperatures, some higher altitudes such as the Andes and Mount Kilimanjaro have glaciers.
This is slightly above the snow line and is the only place on the Equator - S. Park* / D. Way* - Challenge The World (Vinyl where snow lies on the ground. There is a widespread maritime tradition of holding ceremonies to mark a sailor's first crossing of the equator. In the past, these ceremonies have been notorious for their brutality, especially in naval practice. From Wikipedia, the free encyclopedia.
Intersection of a sphere's surface with the plane perpendicular to the sphere's axis of rotation and midway between the poles. For other uses, see Equator disambiguation. Left : A monument marking the equator near the city of Pontianak, Indonesia Right : Road sign marking the equator near NanyukiKenya. Further information: Earth ellipsoid and Reference ellipsoid. Main article: Earth's circumference.
Main articles: SeasonsTropicsand Effect of sun angle on climate. Diagram of the seasons, depicting the situation at the December solstice.
Regardless of the time of day i. In addition to the density of incident light, the dissipation of light in the atmosphere is greater when it falls at a shallow angle.
Main article: Line-crossing ceremony. Geography portal. Retrieved 5 May National Geographic - Education. Retrieved 29 May Benson Chapter 1. Archived from the original on 15 September Retrieved 8 May Equatorial launch sites offered certain advantages over facilities within the continental United States.
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