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The route of Cook's first voyage Later state of map originally published 1748. Revised to show the discoveries of Cook's first voyage (1768-1771) and discoveries in Bering Strait. The first voyage of James Cook was a combined Royal Navy and Royal Society expedition to the south Pacific Ocean aboard HMS Endeavour, from 1768 to 1771.
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 first circumnavigation was that of the ship Victoria between 1519 and 1522, now known as the Magellan–Elcano expedition. It was a Castilian ( Spanish ) voyage of discovery. The voyage started in Seville , crossed the Atlantic Ocean, and—after several stops—rounded the southern tip of South America , where the expedition named the ...
The first voyage is shown in red, ... covering a total distance of 26,412 nautical miles (48,915 km; 30,394 mi). ... first human circumnavigation of the Earth-Moon ...
Eratosthenes (who assumed three variables he had not proved: the distance of the sun, parallel light rays, and that the earth was spherical) had measured the diameter of the Earth with good precision in the 2nd century BC, [14] and the means of calculating its diameter using an astrolabe was known to both scholars and navigators. [12]
On his first voyage of Pacific exploration, Captain James Cook had the services of a Polynesian navigator, Tupaia, who drew a chart of the islands within a 2,000 miles (3,200 km) radius (to the north and west) of his home island of Ra'iatea. [40] Tupaia had knowledge of 130 islands and named 74 on his chart. [41]
The horizontal axis is time, but is calibrated in miles. It can be seen that the measured range is 238,000 mi (383,000 km), approximately the distance from the Earth to the Moon. The distance to the moon was measured by means of radar first in 1946 as part of Project Diana. [44] Later, an experiment was conducted in 1957 at the U.S. Naval ...
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]