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Galileo Galilei
(1564—1642) Italian astronomer and physicist
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(b. Pisa, 15 February 1564; d. Arcetri, Italy, 8 January 1642)
Italian astronomer and natural philosopher, who was one of the earliest true experimental scientists. He constructed, but did not necessarily invent, a thermoscope and thermometer. He had several gifted students, most notably Evangelista Torricelli, who invented the barometer.
