Galileo Galilei (1564 – 1642) was another Renaissance man. He was Italian, a Catholic, and often at odds with the Catholic Church. He was a physicist, mathematician, astronomer, and philosopher—a major leader in the Scientific Revolution. He fostered the “Heliocentric Model of the Solar System in which the sun was the center of solar system rather than the earth. He was accused of heresy and narrowly escaped burning at the stake but was forced to recant.
In 1597 Galileo invented the geometric compass which he used for his celestial observations and the microscope. In 1609 he improved ten fold on the telescope that had been invented the year before . He also invented a thermometer which used the expansion and compression of air to lift and lower water in a tube. Between 1595 and 1598, Galileo devised and improved a Geometric and Military Compass for use by gunners and surveyors. (See pendulum, telescope and clock)
Tomorrow, Two Medical Giants Rita Bay