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geocentric system
The Ptolemaic system also called the geocentric system or geocentric model, mathematical model of the universe formulated by the Alexandrian astronomer and mathematician Ptolemy about 150 CE and recorded by him in his Almagest and Planetary Hypotheses. Ptolemy made contributions to astronomy, mathematics, geography, musical theory, and optics. He compiled a star catalog and the earliest surviving table of a trigonometric function and established mathematically that an object and its mirror image must make equal angles to a mirror.
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The national debt is simply the net accumulation of the federal government's annual budget deficits. It is the total amount of money that the U.S. federal government owes to its creditors. To make an analogy, fiscal or budget deficits are the trees, and the national debt is the forest.
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Tiber River. The most important river in central Italy. It runs some 400 kilometers through a long valley running from Tuscany through Umbria, Latium, past Rome, to the Tyrannize Sea at Ostia (literally, the “mouths” of the river). The river had a positive as well as negative impact on the development of Rome.
The Mediterranean Sea was important to the Roman Empire in that it was a vital trade link with other parts of the Empire, especially the Middle East and North Africa. ... The Romans referred to it as "their sea" and would not allow competing empires to flourish on it, such as the Greeks and Egyptians.
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<h2>What is the difference between an armistice and a treaty? A treaty is a formal agreement to end war permanently. An armistice is an agreement to stop fighting, but that doesn't mean the war has ended.</h2>
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