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To prove Dante's description of the Sun being "joined to the horizon", Galileo interpreted this to mean that the diameter of hell's circle must be equal to the radius of the Earth. [1] This meant that the boundary of the roof on the west would pass through Marseille in France and through Tashkent in modern-day Uzbekistan on the east. [1]
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).
Date: 30 June 1908; 116 years ago (): Time: 07:17: Location: Podkamennaya Tunguska River, Yeniseysk Governorate, Russian Empire: Coordinates: 1]: Cause: Probable meteor air burst of small asteroid or comet: Outcome: Flattened 2,150 km 2 (830 sq mi) of forest Devastation to local plants and animals: Deaths: Up to 3 possible [2]: Property damage: A few damaged buildings: The Tunguska event was a ...
Equal-area projection. In cartography, an equivalent, authalic, or equal-area projection is a map projection that preserves relative area measure between any and all map regions. Equivalent projections are widely used for thematic maps showing scenario distribution such as population, farmland distribution, forested areas, and so forth, because ...
The 1980 Geodetic Reference System (GRS 80) posited a 6 378 137 m semi-major axis and a 298.257222101 flattening. This system was adopted at the XVII General Assembly of the International Union of Geodesy and Geophysics (IUGG) in Canberra, Australia, 1979. The GRS 80 reference system was originally used by the World Geodetic System 1984 (WGS 84).
These estimates varied depending on the girth of its rib cage and the amount of soft tissue modelled around the skeleton, with an overall average weight of 5.9 metric tons (6.5 short tons), and a lowermost estimate with minimal body fat and other tissues at 4.9 metric tons (5.4 short tons) and a maximum of 7 metric tons (7.7 short tons) at its ...
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Vincenty's formulae. Vincenty's formulae are two related iterative methods used in geodesy to calculate the distance between two points on the surface of a spheroid, developed by Thaddeus Vincenty (1975a). They are based on the assumption that the figure of the Earth is an oblate spheroid, and hence are more accurate than methods that assume a ...