Galileo’s 5 Biggest Accomplishments

3. The Sector

Our third entry in the list of Galileo’s 5 biggest accomplishments – the Sector – is also called a military or a geometrical compass. This instrument was designed and patented by Galileo and saw extensive use not exclusive to warfare all the way until after the onset of the nineteenth century. It was put in heavy use by gunners to help them aim cannons but later on also saw use by surveyors and for navigation.

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