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Visual science, mass (31/40) The average mass of an American football player is 112 kg where as the mass of the observable Universe is vastly greater at 10^53kg. Mass is a combination of the total number of atoms, the type of atoms and the density of the atoms in an object irrespective of where it is. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon application of a force.