What causes the material in a neutron star to achieve such incredible density?

Answer

The material is composed almost entirely of neutrons packed nearly as tightly as atomic nuclei

The extreme density of neutron stars, where a teaspoon weighs about a billion tons, results from the material being squeezed until it consists almost entirely of neutrons packed together with a density similar to that found inside atomic nuclei.

What causes the material in a neutron star to achieve such incredible density?

#Videos

How the Collapse of Stars Produces Elements | BBC Earth Science

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