Question: How much more mass would a neutron star need for it to become a black hole?

Stephen Rhatigan answered on 16 Nov 2017:

When a star with 10 to 20 times the mass of the Sun – a massive star – undergoes a supernova, its core collapses under immense gravitational forces to become a neutron star.
Neutron stars typically have twice the mass of the Sun compacted into a radius of tens of kilometers.
If a golf ball had the same density it would weigh around 200 trillion tonnes!
However, if the neutron star has in excess of 3 times the mass of the Sun it will continue collapsing to form a black hole.
Cool question.