What is a neutron star?
After a supernova explosion, the collapsed core of the star is called a neutron star. The matter in a neutron star is so severely compressed that the entire star would have a diameter of about 10 km. the density of a neutron star is incredibly large and consists of only neutrons since protons and electrons also fuse to form neutrons.
What is the ultimate fate of a neutron star?
A neutron star radiates away its internal energy as no fusion takes place. As the internal energy of the neutron star depletes, it cools and ends up as a black neutron star similar to a black dwarf, but more dense.
What is the maximum limit for the mass of a neutron star?
The maximum possible mass of neutron star is 3.2 times the mass of the Sun.
How does a star evolve whose final mass exceeds the maximum limit of mass for a neutron star?
When the final mass of a star exceeds the limit of mass for a neutron star, it becomes a Black Hole instead of a neutron star.