What is the block holes. and how much energy is there?!

What is the block holes. and how much energy is there?

I think is black holes not block holes.
Those black holes seem to be kind of a vacuum.
There are appearing usualy after a supernova.
A black hole has a lot energy!
In the very middle of a black hole there is a point named "singularity" where time and space are missing,the gravitational force is huga enough to smash a sun.
It is just like a vortex.Space dust and whatever is rotating around the singularity point.
Singularity point,if a human can be able to get so far,can`t be seen by our eye!It is very small!
Everything that gets inside a black hole is smashed to pieces,or maybe it is transfered in other time and space.
We don`t exacly know about this... nobody ever seen a black hole by standing near it.
Just very powerfull telescopes can see it.

How a black hole is born?
When a star gets to it end,it makes an implosion.
Mean that all its matter it is going to star`s very own middle.
Because as we know that the biggest gravitation is in the middle of a planet,star etc
By making implosion the combustible that remained inside is pushed with a very powerfull troath outside the star and creates the so caslled "supernova".
And the in the middle of the planet it takes form the singularity point(don`t know if "form" is the best word").