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The degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius ( 1701– 1744), who first proposed it in 1742. The Celsius temperature scale was designed so that the freezing point of water is 0 degrees, and the boiling point is 100 degrees at standard atmospheric pressure.

Since there are one hundred graduations between these two reference points, the original term for this system was centigrade (100 parts) or centesimal. In 1948 the system's name was officially changed to Celsius by the 9th General Conference on Weights and Measures (CR 64), both in recognition of Celsius himself and to eliminate confusion caused by conflict with the use of the SI centi- prefix. While the values for freezing and boiling of water remain approximately correct, the original definition is unsuitable as a formal standard: it depends on the definition of standard atmospheric pressure which in turn depends on the definition of temperature. The current official definition of the Celsius sets 0.01 °C to be at the triple point of water and a degree to be 1/273.16 of the difference in temperature between the triple point of water and absolute zeroAbsolute zero is the lowest temperature that can be obtained in any macroscopic system. Absolute temperature means temperature measured on a scale with absolute zero as 0. This is conventionally measured in kelvin, which is the Celsius degree scale with a. This definition ensures that one degree Celsius represents the same temperature difference as one kelvin.

Anders Celsius originally proposed that the freezing point should be 100 degrees and that the boiling point should be 0 degrees. This was reversed in 1747Events January 31 The first venereal diseases clinic opens at London Dock Hospital April 9 The Scottish Jacobite Lord Lovat was beheaded by axe on Tower Hill, London, for high treason; he was the last man to be executed in this way in Britain May 3 Battle, at the instigation of LinnaeusCarolus Linnaeus (later, Carl von Linn ( May 23, 1707 January 10, 1778) was a Swedish scientist who laid the foundations for the modern scheme of taxonomy. He is also considered one of the fathers of modern ecology (see History of ecology). Biography Carl, or perhaps Daniel Ekström, the manufacturer of most of the thermometerA thermometer is a device used to measure temperatures or temperature changes. Kinds of thermometers There are many different thermometers relying on different principles. These include: Thermistors Thermocouples Mercury-in-glass thermometers Bi-metal mecs used by Celsius.

A temperature of −40 degrees is the same for Celsius and Fahrenheit. Correspondingly, a method for converting Celsius to Fahrenheit is to add 40, multiply by 1.8, and subtract 40. Similarly, to convert Fahrenheit to Celsius add 40, divide by 1.8, and subtract 40.

The Celsius scale is used throughout most of the world for day-to-day purposes, though in broadcast media it was still frequently referred to as centigrade until the late 1980sMillennia: 1st millennium 2nd millennium 3rd millennium Centuries: 19th century 20th century 21st century Decades: 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s 2030s Years: 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 Events and trends or early 1990sCenturies: 19th century 20th century 21st century Decades: 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s 2030s 2040s Years: Events and trends Computers, technology Explosive growth of the Internet; decrease in the cost of computers and other techn, particularly by weather forecasters on European networks such as the BBCThe British Broadcasting Corporation BBC is primarily a national publicly-funded broadcaster based in the United Kingdom, which also has some international services. Some of the international services (such as BBC cable TV in America, Canada and elsewhere, ITVThis article is about the British television network. ITV (or iTV) can also mean interactive television. Independent Television (ITV is the name given to the original network of British commercial television broadcasters, set up to provide competition to, and RTÉ. In the United States and Jamaica, Fahrenheit remains as the preferred scale for everyday temperature measurement. It should be noted, however, that even these countries use Celsius or kelvin for scientific applications.

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CelsiusThe degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius ( 1701 1744), who first proposed it in 1742. The Celsius temperature scale was designed so that the freezing point of water is 0 degrees, and the boiling po