Shorter than the equator radius. R. Wikipedia is registered trademark of the Wikimedia Foundation Inc. Distances from points on the surface to center range km mi

Read More →Anderson . semiminor axis More complicated shapes edit The possibility that Earth equator an ellipse rather than circle and therefore ellipsoid triaxial has been matter of scientific controversy many years. The topographic surface is generally concern of topographers and hydrographers. The first scientific estimation of radius earth was given by Eratosthenes about BC with estimates accuracy measurement ranging from

Read More →Closer approximations range from modelling the shape of surface entire Earth as oblate spheroid or ellipsoid to use spherical harmonics approximate geoid local terms reference ellipsoids. The concept of a spherical Earth dates back to around century BC but remained matter philosophical speculation until rd . Therefore density must be a function of depth ranging from. g cm and according to theoretical arguments see Leonhard Euler Albert Wangerin etc

Read More →Geoid edit Main article was stated earlier that measurements are made on the apparent or topographic surface of Earth and has just been explained computations performed ellipsoid. Main article Earth ellipsoid Further information Reference Since is flattened poles and bulges Equator geodesy represents figure of as oblate spheroid. However it is not feasible for exact mathematical analysis because formulas which would required to take irregularities into account necessitate prohibitive amount of computation

Read More →Early Greek Astronomy to Aristotle. The flattening value varies slightly from one reference ellipsoid to another reflecting local conditions and whether is intended model entire Earth or only some portion of . Many astronomical and navigational computations use it surface representing the Earth. ISSN Williams David R. Y

Read More →IG d typeof . pos v i t f u ildNodes moveChild for page true sb feedback Figure of the Earth From Wikipedia free encyclopedia Jump to navigation search historical development concept see Spherical and Flat . A second theory more complicated than triaxiality proposed that observed long periodic orbital variations of first Earth satellites indicate additional depression south pole accompanied by bulge same degree north . Several different ways of modeling the Earth as sphere each yield mean radius kilometers mi. Many astronomical and navigational computations use it surface representing the Earth

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Push f function tAttribute for var l sj evt nd typeof if assList pd sp et k w return we . pos v i t f u ildNodes moveChild for page true sb feedback Figure of the Earth From Wikipedia free encyclopedia Jump to navigation search historical development concept see Spherical and Flat . In geodetic surveying the computation of coordinates points is commonly performed reference ellipsoid closely approximating size and shape Earth area