Galileo+Galilei

Galileo Galilei 15 February 1564 Pisa, Duchy of Florence, Italy 8 January 1642 He discovered that a pendulum could be used to measure time and invented the telescope, a device that could be used to measure the stars, helping sailors at sea. He also proved that heliocentrism was the correct model of the universe. (Though the Catholic Church refused to admit it, and put him under house arrest for the rest of his life.) Interesting facts His father (Vincenzo Galilei) was a famous lutenist. He also forced him to study medicine, but Galileo studied mathematics in secret.
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