Celsius Celsius scale are defined by absolute zero and the triple point of Vienna Standard Mean Ocean Water (VSMOW), a specially purified water. This definition also precisely relates the Celsius scale to the Kelvin scale, which defines the SI base unit of thermodynamic temperature with symbol K. Absolute zero, the lowest temperature possible, is defined as being exactly 0 K and −273.15 °C. The temperature of the triple point of water is defined as exactly . This means that a temperature difference of one degree Celsius and that of one kelvin are exactly the same. In 1742, Swedish astronomer Anders Celsius
Celsius (crater) Celsius with Celsius A. The interior floor of Celsius is almost featureless, except for a small craterlet in the northern half. By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Celsius. Celsius (crater) Celsius is a small lunar impact crater that is located in the rugged terrain in the southern hemisphere on the Moon's near side, it is named after Anders Celsius who was the founder of the Celsius temperature system which is part of the Metric system. It lies less than one crater diameter