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- Earth_radius abstract "Earth radius is the distance from Earth's center to its surface, about 6,371 kilometers (3,959 mi). This length is also used as a unit of distance, especially in astronomy and geology, where it is usually denoted by .This article deals primarily with spherical and ellipsoidal models of the Earth. See Figure of the Earth for a more complete discussion of models. The Earth is only approximately spherical, so no single value serves as its natural radius. Distances from points on the surface to the center range from 6,353 km to 6,384 km (3,947–3,968 mi). Several different ways of modeling the Earth as a sphere each yield a mean radius of 6,371 kilometers (3,959 mi).While "radius" normally is a characteristic of perfect spheres, the term as used in this article more generally means the distance from some "center" of the Earth to a point on the surface or on an idealized surface that models the Earth. It can also mean some kind of average of such distances, or of the radius of a sphere whose curvature matches the curvature of the ellipsoidal model of the Earth at a given point.The first scientific estimation of the radius of the earth was given by Eratosthenes about 240 BC. Estimates of the accuracy of Eratosthenes’s measurement range from within 2% to within 15%.".
- Earth_radius thumbnail Lowresgeoidheight.jpg?width=300.
- Earth_radius wikiPageID "146689".
- Earth_radius wikiPageRevisionID "605616833".
- Earth_radius hasPhotoCollection Earth_radius.
- Earth_radius subject Category:Earth.
- Earth_radius subject Category:Human-based_units_of_measurement.
- Earth_radius subject Category:Planetary_geology.
- Earth_radius subject Category:Planetary_science.
- Earth_radius subject Category:Units_of_length.
- Earth_radius subject Category:Units_of_measurement_in_astronomy.
- Earth_radius type Abstraction100002137.
- Earth_radius type DefiniteQuantity113576101.
- Earth_radius type Human-basedUnitsOfMeasure.
- Earth_radius type Measure100033615.
- Earth_radius type UnitOfMeasurement113583724.
- Earth_radius type UnitsOfLength.
- Earth_radius type UnitsOfMeasureInAstronomy.
- Earth_radius comment "Earth radius is the distance from Earth's center to its surface, about 6,371 kilometers (3,959 mi). This length is also used as a unit of distance, especially in astronomy and geology, where it is usually denoted by .This article deals primarily with spherical and ellipsoidal models of the Earth. See Figure of the Earth for a more complete discussion of models. The Earth is only approximately spherical, so no single value serves as its natural radius.".
- Earth_radius label "Earth radius".
- Earth_radius label "Erdradius".
- Earth_radius label "Promień Ziemi".
- Earth_radius label "Radio de la Tierra".
- Earth_radius label "Raggio terrestre".
- Earth_radius label "Raio terrestre".
- Earth_radius label "قطر أرضي".
- Earth_radius label "地球半径".
- Earth_radius label "地球半径".
- Earth_radius sameAs Erdradius.
- Earth_radius sameAs Radio_de_la_Tierra.
- Earth_radius sameAs Raggio_terrestre.
- Earth_radius sameAs 地球半径.
- Earth_radius sameAs 지구_반경.
- Earth_radius sameAs Promień_Ziemi.
- Earth_radius sameAs Raio_terrestre.
- Earth_radius sameAs m.012q8k.
- Earth_radius sameAs Q1155470.
- Earth_radius sameAs Q1155470.
- Earth_radius sameAs Earth_radius.
- Earth_radius wasDerivedFrom Earth_radius?oldid=605616833.
- Earth_radius depiction Lowresgeoidheight.jpg.
- Earth_radius isPrimaryTopicOf Earth_radius.
