Radius of the earth in metres

The symbol R?

Approximating the figure of Earth by an Earth spheroid , the radius ranges from a maximum of nearly 6, km 3, mi equatorial radius , denoted a to a minimum of nearly 6, km 3, mi polar radius , denoted b. A nominal Earth radius is sometimes used as a unit of measurement in astronomy and geophysics , which is recommended by the International Astronomical Union to be the equatorial value. A globally-average value is usually considered to be 6, kilometres 3, mi with a 0. The International Union of Geodesy and Geophysics IUGG provides three reference values: the mean radius R 1 of three radii measured at two equator points and a pole; the authalic radius , which is the radius of a sphere with the same surface area R 2 ; and the volumetric radius , which is the radius of a sphere having the same volume as the ellipsoid R 3. Other ways to define and measure the Earth's radius involve the radius of curvature.

Radius of the earth in metres

Approximating the figure of Earth by an Earth spheroid , the radius ranges from a maximum of nearly 6, km 3, mi equatorial radius , represented a to a minimum of nearly 6, km 3, mi polar radius , represented b. Earth radius is sometimes used as a unit of measurement in astronomy and geophysics. The International Astronomical Union recommends that the radius at the equator should be used. A globally-average value is usually believed to be 6, kilometres 3, mi with a 0. The International Union of Geodesy and Geophysics IUGG provides three reference values: the mean radius R 1 of three radii measured at two equator points and a pole; the authalic radius , which is the radius of a sphere with the same surface area R 2 ; and the volumetric radius , which is the radius of a sphere having the same volume as the ellipsoid R 3. All three values are about 6, kilometres 3, mi. Other ways to define and measure the Earth radius involve the radius of curvature. A few definitions yield values outside the range between polar radius and equatorial radius because they include local or geoidal topography or because they depend on abstract geometrical that are carefully thought about. Contents move to sidebar hide. Page Talk. Read Change Change source View history. Tools Tools. In other projects. Wikimedia Commons.

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Help Center Help Center. Length unit of measure, specified as a string scalar or character vector. You can specify any length unit accepted by the validateLengthUnit function. Data Types: char string. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:.

Approximating the figure of Earth by an Earth spheroid , the radius ranges from a maximum of nearly 6, km 3, mi equatorial radius , denoted a to a minimum of nearly 6, km 3, mi polar radius , denoted b. A nominal Earth radius is sometimes used as a unit of measurement in astronomy and geophysics , which is recommended by the International Astronomical Union to be the equatorial value. A globally-average value is usually considered to be 6, kilometres 3, mi with a 0. The International Union of Geodesy and Geophysics IUGG provides three reference values: the mean radius R 1 of three radii measured at two equator points and a pole; the authalic radius , which is the radius of a sphere with the same surface area R 2 ; and the volumetric radius , which is the radius of a sphere having the same volume as the ellipsoid R 3. Other ways to define and measure the Earth's radius involve the radius of curvature. A few definitions yield values outside the range between the polar radius and equatorial radius because they include local or geoidal topography or because they depend on abstract geometrical considerations. Earth's rotation , internal density variations, and external tidal forces cause its shape to deviate systematically from a perfect sphere. Our descriptions of Earth's surface must be simpler than reality in order to be tractable.

Radius of the earth in metres

Earth Radius by Latitude Calculator — Calculates radius and diameter of the Earth for a given latitude. Earth radius at sea level is It is The height above sea level of the location is added.

Myleague

Get all your queries solved in one single place. Contents move to sidebar hide. Global Nav. Earth's Equatorial Radius to Nanometer. Not all deformations originate within the Earth. For the WGS84 ellipsoid, that's respectively:. Input Arguments collapse all lengthUnit — Length unit of measure 'meter' default string scalar character vector. See also: Authalic latitude. The notation is defined such that it can be easily generalized for other planets ; e. Earth's Equatorial Radius to Electron Radius classical. Mechanics of Flight. Bibcode : PEPI.. Another reason could be that they are based on abstract geometrical ideas. Retrieved

The crew of Apollo 17 took this photograph of Earth in December while their spacecraft was traveling between the Earth and the Moon.

All three values are about 6, kilometres 3, mi. Data Types: char string. The radius of the Earth is kilometres, according to data collected by high school classrooms as part of a World Year of Physics project. A few definitions yield values outside the range between polar radius and equatorial radius because they include local or geoidal topography or because they depend on abstract geometrical that are carefully thought about. Retrieved 13 May Regardless of the model, any of these geocentric radii falls between the polar minimum of about 6, km and the equatorial maximum of about 6, km 3, to 3, mi. Hence, the Earth deviates from a perfect sphere by only a third of a percent, which supports the spherical model in most contexts and justifies the term "radius of the Earth". Save my name, email, and website in this browser for the next time I comment. In other projects. These values correspond to the zero Earth tide convention. Since the estimate by Eratosthenes , many models have been created. The Magellan expedition — , which was the first circumnavigation of the World, soundly demonstrated the sphericity of the Earth, [30] and affirmed the original measurement of 40, km 25, mi by Eratosthenes. Earth's Equatorial Radius to Dekameter. Earth's Equatorial Radius to Roman Actus.