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Originally posted by 4nsicphd
Originally posted by endisnighe
Can oxygen or even helium be more dense than lead?
Yup, just collapse it so that the electrons and protons are converted to neutrons after it supernovas and all that is left is a collection of 2 down quarks and an up quark, each with a mass of 300 MeV. Makes lead look like a feather. One teaspoon full of this neutron soup, if brought to earth would weigh a billion tons