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Ulugh-BegUlugh-Beg (1394-1449), a Tartar prince and astronomer, was the grandson of Tamerlane, and his real name was Mohammed Taragai. Devoted to scientific pursuits, he acquired great knowledge of astronomy and geography, and founded institutions to spread such knowledge. He was regent during his father's life and for many years after, and was put to death by his son, who had revolted. He wrote some valuable observations on the fixed stars, and also works on geography and chronology.
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