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To help compare different orders of magnitude this page lists temperatures between 1027 kelvin and 1030 kelvin. Temperatures lower than 1027 K 1027 - 1028 K -- Approximate temperature at which the symmetry of Grand Unified Theory is broken. Occurs 10-35 s after the Big Bang. Temperatures higher than 1030 K External link Conversion Calculator for Units of TEMPERATURE (http://www.ex.ac.uk/cimt/dictunit/cctemp.htm)