alexa Composition and structure of earth

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Composition and structure of earth

The shape of Earth approximates an oblate spheroid, a sphere flattened along the axis from pole to pole such that there is a bulge around the equator.This bulge results from the rotation of Earth, and causes the diameter at the equator to be 43 kilometres (27 mi) larger than the pole-to-pole diameter.Thus the point on the surface farthest from Earth's center of mass is the Chimborazo volcano in Ecuador.The average diameter of the reference spheroid is about 12,742 kilometres (7,918 mi), which is approximately 40,000 km/π, because the meter was originally defined as 1/10,000,000 of the distance from the equator to the North Pole through Paris, France.

CHECK Geophysics and Remote Sensing for more details

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