Did you know, that Anders Celsius (27 November 1701 – 25 April 1744) was a Swedish astronomer, physicist and mathematician.?
Now you know it.
He was professor of astronomy at Uppsala University, from 1730 to 1744, but traveled from 1732 to 1735 visiting notable observatories in Germany, Italy and France.
He founded Uppsala Astronomical Observatory in 1741, and in 1742 proposed the Celsius temperature scale which bears his name.