A neutron star is ________.
A) the remains of a star that died in a massive star supernova (if no black hole was created)
B) the remains of a star that died by expelling its outer layers in a planetary nebula
C) a star made mostly of elements with high atomic mass numbers, so that they have lots of neutrons
D) an object that will ultimately become a black hole

Question

Quizplus · Accepted Answer

A neutron star is the remains of a star that died in a massive star supernova (if no black hole was created). During the supernova, the outer layers of the star are blown off and the remaining core collapses into a dense ball of neutrons. These neutron stars can have masses up to twice that of the Sun, but are only about 20 km in diameter.

A Neutron Star Is ________