-273.15 is the temperature in degree Celsius that corresponds to the value of absolute zero or 0K on the kelvin scale. The kelvin scale is a thermodynamic temperature scale has the same increment or magnitude as one degree Celsius however its null point is at absolute zero. At absolute zero temperature, all molecular movement stops, however all actual temperatures are above the absolute zero temperature. The Kelvin scale is named after Lord Kelvin, (William Thompson), a British inventor born in Belfast, Ireland. Lord Kelvin saw the need of a scale that has a null point of an absolute zero during his research at University of Glassgow and it was created in 1848. Today the kelvin scale is the SI unit of temperature. In school, Thomson showed a keen interest in the classics along with his natural interest in the sciences. At the age of 12 he won a prize for translating Lucian of Samosata's Dialogues of the Gods from Latin to English. In the academic year 1839/1840, Thomson won the class prize in astronomy for his Essay on the figure of the Earth which showed an early facility for mathematical analysis and creativity. Throughout his life, he would work on the problems raised in the essay as a coping strategy during times of personal stress. On the title page of this essay Thomson wrote the following lines from Alexander Pope's Essay on Man. These lines inspired Thomson to understand the natural world using the power and method of science. He was a great man.
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