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To help compare different orders of magnitude this page lists temperatures between 1 kelvin and 10 kelvin. Temperatures lower than 1 K 1 K is equivalent to: -272.15 °C 1 K - temperature at the Boomerang nebula, the coldest place known 2.726 K -- temperature of the background radiation of the Universe 4.1 K -- superconductivity point of mercury 4.22 K -- boiling point of helium 7.2 K -- superconductivity point of lead 9.3 K -- superconductivity point of niobium 10 K is equivalent to: -263.15 °C Temperatures higher than 10 K External link Conversion Calculator for Units of TEMPERATURE (http://www.ex.ac.uk/cimt/dictunit/cctemp.htm)