Who was Celsius?

Answer 1

Anders Celsius (1701-1744) was a Swedish Astronomer who in 1742 created the Celsius temperature scale that uses 100 as the freezing point of water and 0 as the boiling point of water. After his death the scale was reversed to its modern day use of 0 as the freezing point and 100 as the boiling point. The United States uses the Fahrenheit scale created by Gabrial Fahrenheit where 32 degrees is freezing and 212 degrees is boiling.
Anders Celsius was an 18th century Swedish astronomer. Please see the link for more information.