Radius of the earth in metres

Approximating the figure of Earth by an Earth spheroidradius of the earth in metres, the radius ranges from a maximum of nearly 6, km 3, mi equatorial radiusdenoted a to a minimum of nearly 6, km 3, mi polar radiusdenoted b. Radius of the earth in metres nominal Earth radius is sometimes used as a unit of measurement in astronomy and geophysicswhich 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 radiuswhich is the radius of a sphere with the same surface area R 2 ; and the volumetric radiuswhich is the radius of a sphere having the same volume as the ellipsoid R 3.

The symbol R? The radius of our planet, The Earth, is the distance from the centre of the Earth to a point on or near its surface, and it ranges from nearly 6, km to nearly 6, km, approximating the figure of Earth by an Earth spheroid. Furthermore, in astronomy and geophysics, a nominal radius of earth is sometimes employed as a unit of measurement. The radius of curvature is another approach to define and measure the Earth radius, and some definitions produce results that are outside the range between polar and equatorial radius because they include local or geoidal topography. Another reason could be that they are based on abstract geometrical ideas. The radius of the Earth in miles is approximately 3, miles. As mentioned earlier, the Earth is not a perfect sphere but an oblate spheroid, and the value provided is an average radius for the Earth.

Radius of the earth in metres

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:. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location. Toggle Main Navigation. Search MathWorks. Open Mobile Search. Off-Canvas Navigation Menu Toggle. Documentation Examples Functions Videos Answers. Main Content. Examples collapse all Earth Radius in Meters.

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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.

The crew of Apollo 17 took this photograph of Earth in December while their spacecraft was traveling between the Earth and the Moon. The orange-red deserts of Africa and Saudi Arabia stand in stark contrast to the deep blue of the oceans and the white of both clouds and snow-covered Antarctica. In B. Eratosthenes used Aristotle's idea that, if the Earth was round, distant stars in the night sky would appear at different positions to observers at different latitudes. Eratosthenes knew that on the first day of summer, the Sun passed directly overhead at Syene, Egypt. At midday of the same day, he measured the angular displacement of the Sun from overhead at the city of Alexandria - stadia away from Syene.

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 , 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. Hence, we create models to approximate characteristics of Earth's surface, generally relying on the simplest model that suits the need. Each of the models in common use involve some notion of the geometric radius.

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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". Earth's Equatorial Radius to Centimeter. Likewise for surface area , either based on a map projection or a geodesic polygon. Earth's Equatorial Radius to Kilometer. Follow us on. The various radii derived here use the notation and dimensions noted above for the Earth as derived from the WGS ellipsoid; [6] namely,. You have a modified version of this example. Furthermore, because the Earth is not perfectly spherical, it fluctuates depending on where you measure from. Earth's Equatorial Radius to Light Year. Earth's Equatorial Radius to Cubit Greek. While specific values differ, the concepts in this article generalize to any major planet. Length unit of measure, specified as a string scalar or character vector. Oxford University Press.

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

Retrieved Earth's Equatorial Radius to Roman Actus. However, around , Jacques Cassini argued for a prolate spheroid instead, due to different interpretations of the Newtonian mechanics involved. Each of the models in common use involve some notion of the geometric radius. S2CID Furthermore, in astronomy and geophysics, a nominal radius of earth is sometimes employed as a unit of measurement. Archived from the original PDF on WGS What is the radius of the Earth? Please provide values below to convert Earth's equatorial radius to meter [m], or vice versa. Cross section of Earth's Interior. WGS ellipsoid, semi-major axis a.