The improvements in weapons, ships, clothing, rocketry and underwater techniques helped with the improvement of navigation.
Some of the world’s most important explorers used astrolabes on the expeditions to faraway lands. The astrolabe was used by Christopher Columbus in his voyage to the Americas. Ferdinand Magellan and his crew relied also on an astrolabe during the first circumnavigation of Earth. Many Arab travellers used it too to navigate the desert.
In the 16th century, before the invention of the telescope, Tycho Brahe (Danish astronomer) constructed an astrolabe with a radius of 10 ft. Until superseded by the sextant during the 18th century, smaller types of astrolabes were the principal instruments used by navigators.
Sailors used the stars for guidance. For measuring the altitude of celestial bodies to determine ship position, they used some instruments like octants and sextants. The octant was used to work out the latitude but not longitude. In 1757 it was succeeded by the sextant, which could measure both.
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La provincia de San Román pertenece al departamento de Puno y este pertenece al Perú; asimismo Perú es un país que pertenece al continente de Sudamérica, el cual forma parte del continente Americano.
País es un país bello que está a punto de celebrar su bicentenario de la independencia.
Además de recordar a los héroes que consumaron la independencia para separarse de la corona española, es un buen momento para visitar sus extraordinarios sitios arqueológicos. En Perú abundan estos sitios tan interesantes.
Hablamos del legado cultural de Caral, Tiahuanaco y el Perú antiguo, que es de suma importancia en la actualidad para entender cómo se evolucionó pero hasta conformar la sociedad moderna del Perú, con todas sus características, cultura, tradiciones e historia.
Conflict is the opposition between two forces.
Conflict management is the reduction of conflict by different ways.
<span>Social cognitive theory emphasizes the role of Modeling in language Learning.
In social cognitive theory, Modeling is a form of imitation that carried out without instruction. People do this by embodying a role model in their mind and try to form some sort of behavioral pattern that will bring them closer to that role model
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