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When stars go supernova, a neutron star may be left over if there isn't enough mass to create a black hole. Based on the mass present, will a neutron star have a varying density or is the radius simply larger for heavier neutron stars?

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    $\begingroup$ The central density will be a function of the star's radius, but it cannot depend on the original composition of the star that shrunk to a neutron star as it aged. The ratio of neutrons, protons, and electrons in neutron star matter at low temperature is universal, fully determined by principles of chemical equilibrium. $\endgroup$ – Bert Barrois Apr 15 at 11:19

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