What objects can remain after the core-collapse supernova of a massive star?

Answer

A neutron star or a black hole

After the supernova explosion driven by core collapse, what remains is either a neutron star or, if the original star was massive enough, a black hole.

What objects can remain after the core-collapse supernova of a massive star?

#Videos

Why Do Some Red Giant Stars Explode As Supernovae? - YouTube

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