• ns1@feddit.uk
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      23 hours ago

      we have assumed that Rex is comprised of a uniform nucleon fluid, with protons, neutrons and electrons in an idealised 1:8:1 ratio

      This is how the author is estimating it, they are assuming 1/9th of the mass is protons. No idea how good that assumption is though, there is a source which doesn’t look the most convincing

      • bleistift2@sopuli.xyz
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        21 hours ago

        Whoopsie. I used to assume neutron stars are made of neutrons. It turns out Big Astronomy lied to me.

        • Natanael@infosec.pub
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          9 hours ago

          Neutron stars have so high pressure that MOST but not all protons decay into neutrons plus electrons (plus neutrinos)

        • Revan343@lemmy.ca
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          21 hours ago

          Neutron stars are made of neutrons in the same way that tapwater is made of water molecules: primarily, but not entirely