Why does the black hole have a much greater gravitational force than the red giant that created it?
Before the red giant turns into a black hole it shrinks to become a white dwarf which is incredibly hot. This star is very dense. I then explodes and becomes as supernova, this is also very hot and bright. This explosion compresses the core of the star into a neutron star which is VERY dense. This then starts pulling matter towards it (due to it’s huge gravitational pull). Once it has ‘collected’ enough mass it becomes dense enough and then forms a black hole. Technically the red giant and the black hole have the same gravitational pull, it’s just the mass has been compressed into a tiny area. Black holes emit hawking radiation, if they emit more mass through hawking radiation than they gain then the black hole will effectively evaporate.
