Anders Celsius
Anders Celsius (27 November 1701 – 25 April 1744) was a Swedish astronomer. Celsius was born in Uppsala in Sweden. Much of his work was in what was later called Geodesy.
He is more famous for developing the Celsius temperature scale when he worked on meteorology (a science about weather conditions). It later became an the international standard. One of his good friends Daniel Gabriel Fahrenheit invented the Fahrenheit scale for the thermometer.