Do black hole ever go away?

Question

I'm mean do they last for ever.

Answer 1

they dont

Answer 2

Over a long period of time the will go away but that it will take a very long time.

Answer 3

A black hole life  is so long that we will think it is forever. It furnishes the gravity for the galaxy ,to keep the many solar systems in orbit around it...

Answer 4

yes im afraid so

Answer 5

No they don't. After a few billion years, they "evaporate" and die.

Answer 6

We think so. Well, Stephen Hawking, our greatest mind on the subject thinks they are radiating energy.

The 'big freeze' model also suggests that - as space expands - some galaxies are moving toward each other (we move toward Andromeda!) and will create big huge black holes here and there in an ever expanding universe. But, with time, those black holes will also empty their energy and what is left is a gigantic space where here and there a particle is wandering with even not enough gravity to form an atom.

So, no it doesn't seem that they will last for ever.

Answer 7

Actually what happens is the older they get the stronger they get, sucking up all the stars, planets and space debris that is unfortunate enough to be in the general vicinity.

However it's biggest strength is also it's downfall.  Eventually the pull of gravity inside gets so strong even the black hole falls victim to it's own power and it collapses into itself, the hole getting smaller and smaller until it is just a single point to infinity.  Here is a link I found very helpful, hopefully you will too: http://en.wikipedia.org/wiki/Black_holes

I hope this answers your question!  Good luck to you.

Answer 8

Yes.

While there's stuff around to consume, they get bigger.  But by themselves, they radiate a little bit in a process called Hawking Radiation.  Basically, a pair of particles, maybe photons, form from the quantum vacuum near the event horizon.  In some cases, one particle escapes into space, and the other gets sucked back into the hole.  Eventually, there's nothing less.

But it takes a long time, perhaps 10^100 years.  The Universe is about 10^10 years old now.  This is 10^90 times as long, or so.

After the black holes are gone, the Universe is filled with a few stray low energy photons, here and there.  This is the heat death of the Universe.

But stay tuned.  Dark Energy isn't well understood as yet.  It may turn out that the Universe will undergo a Big Rip.  If so, black holes may not have enough time to die.

Answer 9

I'm thinking that you know that Black holes can absorb everything, even light. And that once you pass the event horizon, nothing can escape.

However, there is a theory that black holes, the HUGE black holes that just keep swallowing stuff are decaying.

Stephen Hawking, the genius paraplegic who wrote a Brief History of Time hypothesizes that due to some tunneling effects, some radiation may leak from black holes.

Tunneling is an object moving from one point to the other, without traveling the distance in between. Better known as teleporting. However, the only tunneling done, is by very very very small objects, like electrons. Google information about the Scanning Tunneling Microscope for uses of electron tunneling.

So the general theory is that black holes do leak a small amount of radiation. And if the amount of energy they consume is less then the energy they leak, then it will eventually disappear.

also, there are such things as micro black holes, and they appear and disappear REALLY fast. But from what I know, science can't explain why they appear, (and maybe how they disappear) But they are working on that with the new theory to tie together quantum mechanics and Newton's Gravity laws in "String Theory"

Answer 10

for all intents and purposes, yes.

they do radiate away energy in the form of hawking radiation. its a strange effect of quantum mechanics, but its actually pretty interesting. basically all around us particle pairs are being created and then annihilating eachother in a tiny tiny fraction of a second. they are called virtual particle pairs because they last for so short a period of time its almost as if they didnt exist at all. if they last long enough to actually be observed *directly* they are not virtual particles.

heres how it works. those virtual particle pairs are actually particle-antiparticle pairs. the black holes gravity is so strong that it can spontaneously produce virtual particle pairs. if they were to be created directly outside of the event horizon of the black hole one particle could fall in. to satisfy conversation of energy, that particle must have a negative energy. so it falls in and cancels out some energy (and therefore mass) of the black hole. to an observer outside of the black hole it would appear as if the black hole emitted a particle (the positive energy particle that didnt fall into the black hole). therefore, the black hole loses mass.

but thats radiating away the mass of an entire star particle by particle, which would take a long, long time. trillions of years.