The credit for the development of Celsius scale goes to Anders Celsius, an astronomy professor in Sweden, who introduced a new temperature scale in 1741. As per his calibrations, 100 was the temperature at which water boiled and 0 was the temperature at which water froze. Shortly after the death of Andres, the name of the scale was changed to centigrade scale. There is a slight difference in Celsius and centigrade scales (a difference of 0.1 degrees in readings), however, for day-to-day use, both are almost same.