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To help compare different orders of magnitude, we list here masses between 1039 and 1042 kilograms. See also masses of other orders of magnitude. lighter masses[?] 3.6 × 1041 kg -- mass of the Milky Way Galaxy heavier masses[?] External link Conversion Calculator for Units of MASS (& Weight): http://www.ex.ac.uk/cimt/dictunit/ccmass.htm