What temperature can the interior of a core reach when collapsing to form a neutron star?

Answer

1 trillion Kelvin (K)

When a core collapses to form a neutron star, the initial interior temperature can crest around 1 trillion Kelvin (K), which is nearly ten times greater than the steady-state heat required for the star's main sequence life.

What temperature can the interior of a core reach when collapsing to form a neutron star?
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