tell me stuff about black holes and supernovae?

Question

do answer my question! I want to know as much as I can about them.
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Answer 1

i A supernova is a large [20 Solar mass star] that has burned up all its available fuel,the star collapses then explodes in a cataclysmic blast the that spews matter into the surrounding hydrogen field and produces planets and people like us.
A 1.2 to 2 mass stellar remnant remains at the original site.
This small massive star has a surface orbital velocity which is much greater than earth if you compress the star and reduce its radius the orbitals velocity increases.
If you compress it enough the orbital velocity reaches the speed of light,so they say no light can escape hence a black hole!
But it is my contention that a black hole is a theoretical non-viable entity. they do not and can not exist!

Answer 2

supernovasare stars that are soo large(giant stars) that they burn up very quickly and use up all their fuel.then they collaspe, and when they collaspe due to the gravitional pull of the core materials it triggers a higher level reaction causing it to explode.when the mass of the giant star is too big it does not trigger a higher reaction but collaspe into a black hole.
a black hole is matter that has been compressed into so dense a material that even light cannot escap it's gravitational pull.
the limit at which light cannot escape is know as the swarztchild limit or the event horizon(i hope that i got the spelling right.)
if a star does not becomes a black hole then it will burn out as a dwalf star and finally a neutron star.
God bless,
gabe