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Wrote a book: Ptolemy synthesized and extended Hipparchus's system of epicycles and eccentric circles to explain his geocentric theory of the solar system. Ptolemy's system involved at least 80 epicycles to explain the motions of the Sun, the Moon, and the five planets known in his time. He believed the planets and sun to orbit the Earth in the order Mercury, Venus, Sun, Mars, Jupiter, Saturn . This system became known as the Ptolemaic system.
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All inhabitants at liberty of the Roman Empire get the civil rights.
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Churchbuildingprograms in Rome, Jerusalem and Constantinople.
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First Crusade. Jerusalem is re-taken from the Muslims on the urging of Pope Urban II
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In 1121 Al-Khazini published "The Book of the Balance of Wisdom." In this, Al-Khazini described a hydrostatic balance for measuring gravity and proposed that the gravity acting on an object is dependent on it's distance rom the center of the Earth.
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Christopher Columbus sails to find America!
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Johannes Ruysch produced the first printed map of America
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Copernicus introduced his friends to the idea of the sun being in the center of the solar system. His work on Heliocentrism was published in 1542.
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Erasmus published his version of the New Testament. He began by copying manuscripts found in monasteries and given to him by his friend Thomas More. His Latin translation and commentary and an improved Greek text differed in many places from the Vulgate of St. Jerome, and was immediately recognized as the most accurate translation so far.
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An Italian scientist who formulated the basic law of falling bodies, which he verified by careful measurements. He constructed a telescope with which he studied lunar craters, and discovered four moons revolving around Jupiter and espoused the Copernican cause.
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Jamestown is colonized by English in the Americas (near present-day Virginia).
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Johannes Kepler published his first two laws of planetary motion in 1609. The first law stated "The orbit of every planet is an ellipse with the Sun at one of the two foci." The second law stated "A line joining a planet and the Sun sweeps out equal areas during equal intervals of time." Keplar's third law was published at a later date in 1619. The third law stated "The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit."
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King James Bible is finished
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Issac Newton published his book Principia which held his classical theory of gravitiational force.
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US adopts the Declaration of Independence and declares independence against Britain.
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Chinese printers adapt Wood-block printing to mass produce classical books.
