Relativity

How are Black Holes formed?  (here we are talking about stars much bigger than the sun) In stars, the hot plasma is pulled so hard by gravity that the atoms fuse to form other elements.  hydrogen fuses into helium, then the fusion releases energy that needs to escape and thus , pushes the gravity and keeps the balance stable. after a while the helium is exhausted the gravity tries to squeeze the star and the core fuses into heavier and heavier metals like helium to carbon ,carbon to neon , neon to oxygen , oxygen to silicon and finally silicon to iron. Iron does not produce any energy and does not fuse thus, the gravity takes over killing the star in a supernova explosion at 25% the speed of light. Now it will turn into either a neutron star or if its denser it would become a black hole.  The Black Hole A black hole is a place where the universe breaks. It is so dense that a black hole 1 cm wide will contain the mass of the whole earth. it`s gravitational force is so stro...