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Can a neutron star last indefinitely? What is the ultimate fate of a neutron star if neutron degenerate matter is stable against beta decay?
What is the ultimate fate of a neutron star if neutron degenerate matter is stable against beta decay?
If neutron degenerate matter is stable against beta decay, then the neutron star will be stable and won't collapse into a black hole or explode into a supernova. It will continue to exist as a neutron star for billions or even trillions of years. Eventually, it will cool down and become invisible to us.