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Alfraganus had calculated the length of a degree to be 56⅔ Arabic miles (66.2 nautical miles). [15] Columbus therefore estimated the size of the Earth to be about 75% of Eratosthenes's calculation, and the distance from the Canary Islands to Japan as 2,400 nautical miles (about 23% of the real figure). [18]
Christopher Columbus [b] (/ k ə ˈ l ʌ m b ə s /; [2] between 25 August and 31 October 1451 – 20 May 1506) was an Italian [3] [c] explorer and navigator from the Republic of Genoa [3] [4] who completed four Spanish-based voyages across the Atlantic Ocean sponsored by the Catholic Monarchs, opening the way for the widespread European exploration and colonization of the Americas.
Illustrative woodcut from the Latin edition of Columbus's letter printed in Basel in 1494. [1]A letter written by Christopher Columbus on February 15, 1493, is the first known document announcing the completion of his first voyage across the Atlantic, which set out in 1492 and reached the Americas.
[1] [2] [3] The work was the most popular treatment of Columbus in the English-speaking world until the publication of Samuel Eliot Morison's biography Admiral of the Ocean Sea in 1942. [3] It is one of the first examples of American historical fiction and one of several attempts at nationalistic myth-making undertaken by American writers and ...
Columbus is a city in and the county seat of Colorado County in southeastern Texas, United States. The population was 3,699 as of the 2020 census . [ 4 ] It is located on the Colorado River .
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Driven by the demands of navigation and the growing need for accurate maps of large areas, trigonometry grew to be a major branch of mathematics. Bartholomaeus Pitiscus was the first to use the word, publishing his Trigonometria in 1595. Regiomontanus's table of sines and cosines was published in 1533. [188]
Columbus under the Spanish flag rediscovered and explored much of the Lesser Antilles in his second voyage then discovered both Trinidad and Tobago on his third voyage whilst skirting the northern South American coast. His fourth voyage was spent scanning the Central American coast. The Spanish voyages of Christopher Columbus opened the New World.