who figured out the world was round?
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Over 2,000 years ago, the Greek philosopher Aristotle had it all figured out. In his book On the Heavens, he wrote: "Again, our observations of the stars make it evident, not only that the Earth is circular, but also that it is a circle of no great size.
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The Earth rotates around a north-south axis as you see on the right. Most maps show North at the top and South at the bottom. To the left is West and to the right is East.
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['George Washington measured land, air space and water.', 'John Adams taught for a few years and became a lawyer.', 'Thomas Jefferson was a horticulturist, architect and musician, among other things.']
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Unthinkable? If a finding released Thursday by scientists in Geneva proves to be true, the world's most famous equation – Albert Einstein's E=MC2 – could be moot, undoing our current understanding of the physical world. Einstein revealed that equation in his special theory of relativity released in 1905.
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While Copernicus rightly observed that the planets revolve around the Sun, it was Kepler who correctly defined their orbits. At the age of 27, Kepler became the assistant of a wealthy astronomer, Tycho Brahe, who asked him to define the orbit of Mars.
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In the geocentric model for the solar system developed by Ptolemy, to what does the word "epicycle" refer? a collection of ancient data and predictions of positions of the Sun, Moon, and planets, compiled by Ptolemy.
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The four parts of the world or the four corners of the world refers to the Americas (the "west"), Europe (the "north"), Asia (the "east"), and Africa (the "south").
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It is impossible to state exactly what day was the first. There was a ''calculation'' performed by a Bishop in Ireland in the 1600s where he 'proved' that if you take the bible literally, the world was formed on Sunday 23 October 4004 BC (the calculation makes no mention of the time of day).
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The answer took a while for astronomers to figure out, leading to a debate between what is known as the geocentric (Earth-centered) model and the heliocentric (Sun-centered model). ... The Earth was in the center of it all (geocentric), with these planets revolving around it.
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There are 360° of longitude around the whole planet. If you divide 24 hours by 360 degrees of longitude, you get 4 minutes per degree of longitude.
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A globe is the most accurate way to represent Earth's curved surface.
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Under the geocentric model, the Sun, Moon, stars, and planets all orbited Earth. ... Two observations supported the idea that Earth was the center of the Universe: First, from anywhere on Earth, the Sun appears to revolve around Earth once per day.
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history of astronomy (An eccentric circle is a circle that is slightly off-centre from Earth, and an epicycle is a circle that is carried and rides around on another circle.)
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In 1973, a German amateur historian sparked a storm of controversy by claiming to have invented a whole new way of looking at the world. At a press conference at the United Nations in New York, Arno Peters condemned the standard rectangular map of the world as a symbol of the subjugation of the Third World.
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During the Age of Discovery methods of navigation developed quickly because of the need of European explorers venturing to the New World discovered by Columbus in 1492. The instruments navigators used varied and included the quadrant, astrolabe, cross staff, hourglass, compass, map or nautical chart, and other devices.
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The ancient Greek mathematicians knew how to use compass and straightedge to construct a length equal to the square root of a given length. In 1837 Pierre Wantzel proved that an nth root of a given length cannot be constructed if n is not a power of 2.
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['The Fax Machine Was Invented The Same Year The First Wagon Crossed the Oregon Trail (1843)', 'NASA Was Exploring Space By The Time Scientists Could Agree On Plate Tectonics (1965)']