Celsius
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The degree Celsius is the unit of temperature on the Celsius temperature scale, one of two temperature scales used in the International System of Units, the other being the closely related Kelvin scal
A thermometer calibrated in degrees Celsius, showing a temperature of 0 °C in a glass of ice and water
Measurement of an ice-water mixture in equilibrium at 370 m above sea level. Thermometer shows 0.05 °C. The slight deviation from 0 °C is due to instrument uncertainty and trace water impurities.
Boiling point of water measured at an altitude of ~370 m a.s.l. The 99.7 °C result reflects lower atmospheric pressure (~970 hPa), combined with minor instrument uncertainty and trace water impurities.
Anders Celsius
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Anders Celsius was a Swedish astronomer, physicist and mathematician. He was professor of astronomy at Uppsala University from 1730 to 1744, but traveled from 1732 to 1735 visiting notable observatori
Celsius
…to a specific point on the Celsius temperature scale or to a difference or range between two temperatures. It is named after the Swedish astronomer Anders Celsius (1701–1744), who proposed the first version of it in 1742. The unit was called centigrade in several languages (from the Latin centum, which means 100…
Portrait by Olof Arenius
Anders Celsius c. 1730s
The observatory of Anders Celsius, from a contemporary engraving
De novo in fluviis norlandiarum piscandi modo, 1738