Radius of the earth in metres

Approximating the figure of Earth by an Earth spheroidthe radius ranges from a maximum of nearly 6, km 3, mi equatorial radiusrepresented a to a minimum of nearly 6, km radius of the earth in metres, mi polar radiusrepresented 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.

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.

Scholars have interpreted Aristotle's figure to be anywhere from highly accurate [22] to almost double the true value.

Please provide values below to convert Earth's equatorial radius to meter [m], or vice versa. From: Earth's equatorial radius To: meter. Earth's Equatorial Radius to Kilometer. Earth's Equatorial Radius to Decimeter. Earth's Equatorial Radius to Centimeter. Earth's Equatorial Radius to Millimeter. Earth's Equatorial Radius to Micrometer.

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.

Radius of the earth in metres

The calculator below calculates Earth radius at a given latitude. In fact, of course, it calculates the radius of WGS 84 reference ellipsoid at a given latitude, and if you want some theory recap, you can find it below the calculator. Since the Earth is flattened at the poles and bulges at the equator, geodesy represents Earth's shape with an oblate spheroid.

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Earth Radius in Specified Units. March The various radii derived here use the notation and dimensions noted above for the Earth as derived from the WGS ellipsoid; [6] namely,. Further information: Equatorial bulge. Fundamentals Geodesy Geodynamics Geomatics History. Read Change Change source View history. Earth's Equatorial Radius to Kiloparsec. The cases below considers Earth's topography , above or below a reference ellipsoid. For Earth, the arithmetic mean radius is 6, Cross section of Earth's Interior. Earth's Equatorial Radius to Planck Length. FAQs What is the earth's radius? Furthermore, because the Earth is not perfectly spherical, it fluctuates depending on where you measure from. Toggle limited content width. Earth's Equatorial Radius to Astronomical Unit.

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.

For Earth, the arithmetic mean radius is 6, We set this equal to the fundamental equation, force F equals mass m multiplied by acceleration a , and since the acceleration due to gravity is 9. Earth's Equatorial Radius to Attometer. Earth's diameter is simply twice Earth's radius; for example, equatorial diameter 2 a and polar diameter 2 b. While specific values differ, the concepts in this article generalize to any major planet. The extrema geocentric radii on the ellipsoid coincide with the equatorial and polar radii. Earth's Equatorial Radius to Megaparsec. The expedition found that Newton's conjecture was correct: [32] the Earth is flattened at the poles due to rotation's centrifugal force. As such, they are topographical geocentric distances , R t , which depends not only on latitude. Archived from the original PDF on Hence, we create models to approximate characteristics of Earth's surface, generally relying on the simplest model that suits the need. Journal of Geodesy.