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Earth radius (denoted as R 🜨 or R E) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an Earth spheroid (an oblate ellipsoid), the radius ranges from a maximum (equatorial radius, denoted a) of nearly 6,378 km (3,963 mi) to a minimum (polar radius, denoted b) of nearly 6,357 km (3,950 mi).
The studio zone, also known as the thirty-mile zone ( TMZ ), is an area defined by a 30-mile (48 km) radius of "Hollywood" used by the American entertainment industry to determine employee benefits for work performed inside and outside of it. Its center has traditionally been regarded as the southeast corner [ 1] of Beverly Boulevard and La ...
[26] [53] This has a radius that varies between 70 and 85 kilometers (43 and 53 mi). [25] The next ring structure, moving inwards, is the peak ring. The area between the inner rim and peak ring is described as the "terrace zone", characterized by a series of fault blocks defined by normal faults dipping towards the crater center, sometimes ...
Earth's circumference is the distance around Earth.Measured around the equator, it is 40,075.017 km (24,901.461 mi).Measured passing through the poles, the circumference is 40,007.863 km (24,859.734 mi).
10-kilometre and 30-kilometre Zones. The Exclusion Zone was established on 2 May 1986 soon after the Chernobyl disaster, when a Soviet government commission headed by Nikolai Ryzhkov [ 8]: 4 decided on a "rather arbitrary" [ 6]: 161 area of a 30-kilometre (19 mi) radius from Reactor 4 as the designated evacuation area.
Geographical distance or geodetic distance is the distance measured along the surface of the Earth, or the shortest arch length. The formulae in this article calculate distances between points which are defined by geographical coordinates in terms of latitude and longitude. This distance is an element in solving the second (inverse) geodetic ...
The predicted values for the moment of inertia based on planetary models suggest a core radius of 2,900–3,450 km. [74] This is in line with the first observation-based estimate of 3,500 km. [76] The principal difference between the two planets is the lack of evidence for plate tectonics on Venus, possibly because its crust is too strong to ...
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