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Does a Black Hole Explode

In the Face Book group:
The post was the above question.
My comment:

These are the fun challenges for cosmologists. It is literally impossible to test a theory for the big bang event. How do we duplicate the initial conditions and verify our assumptions are correct by letting it play out?

A black hole has a similar scenario as the big bang - create a test of gravitational collapse for a super mass and let it play out. Does a singularity result? Can a way be found for it to explode?
At this point some of our cosmology theories are untestable guesses. Models will just have all our assumptions; they are not a test.
Further observations can revise our assumptions but confirmation is elusive.

Someone responded to my comment with this:

Actually, we know a lot. "Super colliders" have been a big help. I was in college in the 80's. They had confidence of events at around one second back then. Today, they have confidence of the event down to a fraction of a second. Yes indeed, lots of fun!

My response:

I certainly agree we know a lot but with cosmology so much of what we need to learn is out there.
Like a black hole.


I also added another comment to the original post - the question. This is my comment:

 If gravity is so strong to collapse matter into a singularity with zero radius (so even an electron can't fit in there) and infinite density then what internal force is available to allow anything to leave by overcoming gravity, or to cause this explosion in the question?

If there is no such force then it can't explode.

This comment got this response:

Well, we know it happened at least once. The Big Bang.

My response:

Are they the same?
A black hole is collapsed matter. The big bang created all matter and energy and a singularity is proposed to have held whatever magic stuff evolved into all matter and energy.

His response:

It's my "understanding" that a singularity is a singularity.... I have not had to distinguish between "types" of singularities, so I personally cannot answer that. But it's my understanding that a black hole can collapse into a singularity. And from there, I don't see why it couldn't explode. Recall some years ago when amateur sleuths were concerned that colliders would create singularities? Our colliders can't do that. But singularities can explode.

My response:

We should hope they are not the same. Someone posted an article to this FB group awhile ago about millions of black holes in the milky way. A search of the web will hit some of those. Earth is unlikely to survive millions of big bangs in our galaxy.

His response:

 Ha! No no. Singularities do not automatically result in big bangs. Far from it:)

My response:
ok - so they are different...

his response:

The singularity that caused the Big Bang was infinitesimally rare. It's not a routine occurrence. But all singularities are an infinitesimal point of unimaginable gravity. Hawking said a teaspoon of a black hole has the weight of thousands of our Star the sun. Singularities are points of gravity even far more dense. Our singularity was so tight, it exploded into all "this". Pretty neat.


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