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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). [1] Measurement of Earth's circumference has been important to navigation since ancient times. The first known scientific measurement and calculation was done by Eratosthenes, by comparing ...
kilometre (km) or kilometer is a metric unit used, outside the US, to measure the length of a journey; the international statute mile (mi) is used in the US; 1 mi = 1.609344 km. nautical mile is rarely used to derive units of transportation quantity.
8,000 metres. There are 14 mountains over 8,000 metres (26,247 ft), which are often referred to as the Eight-thousanders. (Some people have claimed there are six more 8,000m peaks in Nepal, making for a total of 20.
Earth radius (denoted as Rđ¨ or ) 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, the radius ranges from a maximum of nearly 6,378 km (3,963 mi) ( equatorial radius, denoted a) to a minimum of nearly 6,357 km (3,950 mi) ( polar radius, denoted b ).
The mile, sometimes the international mile or statute mile to distinguish it from other miles, is a British imperial unit and United States customary unit of distance; both are based on the older English unit of length equal to 5,280 English feet, or 1,760 yards. The statute mile was standardised between the Commonwealth of Nations and the ...
To-scale diagram of low, medium, and high Earth orbits. A medium Earth orbit ( MEO) is an Earth-centered orbit with an altitude above a low Earth orbit (LEO) and below a high Earth orbit (HEO) â between 2,000 and 35,786 km (1,243 and 22,236 mi) above sea level. [1]
Endurance running is often a component of physical military training. Long-distance running as a form of tradition or ceremony is known among the Hopi and Tarahumara people, among others. [4] [5] In the sport of athletics, long-distance events are defined as races covering 3 km (1.9 mi) and above. The three most common types are track running ...
Model of Spirit of Australia, which holds the water speed record. Vestas Sailrocket, the fastest wind-powered watercraft. Decavitator, the fastest human-powered watercraft. Omer 5, the fastest human-powered submarine. The " Caspian Sea Monster ", the fastest ground-effect vehicle [a] Water speed records. Category.