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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). [1] Treating the Earth as a sphere, its circumference would be its single most important measurement. [2]
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).
To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 10 −1 m (1 cm and 1 dm). 1 cm – 10 millimeters; 1 cm – 0.39 inches; 1 cm – edge of a square of area 1 cm 2; 1 cm – edge of a cube of volume 1 mL; 1 cm – length of a coffee bean; 1 cm – approximate width of average fingernail
Heinz Stücke has been cycling around the world since 1962. Arthur Blessitt has been walking around the world carrying a 45 lb (20 kg) wooden cross since 25 December 1969, covering 42,279 miles (68,041 km) through 324 countries. As of 13 June 2008, aged 67, he had walked in every country of the world, since when he has returned to some.
where F g is the gravitational force acting between two objects, M E is the mass of the Earth, 5.9736 × 10 24 kg, m s is the mass of the satellite, r is the distance between the centers of their masses, and G is the gravitational constant, (6.674 28 ± 0.000 67) × 10 −11 m 3 kg −1 s −2. [68]
On 13 June 2003, Robert Garside completed the first recognized run around the world, taking 5 + 1 ⁄ 2 years; the run was authenticated in 2007 by Guinness World Records after five years of verification. [42] [43] On 6 October 2007, Jason Lewis completed the first human-powered circumnavigation of the globe (including human-powered sea ...
1 Around the world. 2 See also. 3 References. Toggle the table of contents. ... Jilin - for about 2 km Heilongjiang - for <1 km Jilin - for about 10 km Heilongjiang
where tan β = (1 − f)tan φ and e′ 2 = e 2 / 1 − e 2 . Even though latitude is normally confined to the range [− π / 2 , π / 2 ] , all the formulae given here apply to measuring distance around the complete meridian ellipse (including the anti-meridian).