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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).
Earth's average orbital distance is about 150 million km ... world ocean would be 2.7 to 2.8 km ... lower thermosphere around an altitude of 100 km, ...
[nb 1] Earth's orbital speed averages 29.78 km/s (19 mi/s; 107,208 km/h; 66,616 mph), which is fast enough to cover the planet's diameter in 7 minutes and the distance to the Moon in 4 hours. [3] The point towards which the Earth in its solar orbit is directed at any given instant is known as the "apex of the Earth's way". [4] [5]
A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. [2] [3] [4] Historically, it was defined as the meridian arc length corresponding to one minute ( 1 / 60 of a degree) of latitude at the equator, so that Earth's polar circumference is very near to 21,600 nautical miles (that is 60 minutes × 360 degrees).
Dymaxion map of the world with the 30 largest countries and territories by area. This is a list of the world's countries and their dependencies, ranked by total area, including land and water. This list includes entries that are not limited to those in the ISO 3166-1 standard, which covers sovereign states and dependent territories.
88 km (55 mi) for the longest Mollepata variant of the Inca trail, with options for a single day to more than six days, all ending at Machu Picchu; 32 km (20 mi) Cachora to Choquequirao trek; 80 km (50 mi) 5- to 6-day trek on Ausangate Circuit; Colca Canyon near Arequipa. 60 km (37 mi) 5-day trek around Canyon or other single-day and multi-day ...
Had a public railway. Has a 3 km tourist line opened in 2019. 052 Belize: Had one public railway and a number of private lines 084 Brunei: Has a 4 km section of pier railway (so is outside the definition for this article) 096 Burundi: Had an internal port railway 108 Cape Verde: Had a harbour railway 132 Central African Republic