Will the universe one day be just a black hole?

Question

if black holes feed form the centre of Galaxy's the wont they one day feed all matter from the Galaxy on so on throughout the known universe ?

Answer 1

  If a black hole could exist it would eventually accrete all the matter and all the black holes in the universe and sit for eternity doing nothing.

  The universe is a finite entity with a beginning and an end and there are other good reasons why a black hole can't exist.

Answer 2

why not seems plausible to me,,

black holes eat matter whole galaxies, every thing is expanding away from central point, at some point only black holes will be left.

Could these not then start collapsing towards each other forming a universe full of galaxies of blacks holes all caught in each others gravity and then perhaps seem to be collapsing back to a single point leaving only one black hole at the centre of the universe when finally gravity loses the battle and the one ultimate black hole explodes to release all the matter eaten in it's life.  and then BANG it all starts again.

Answer 3

The matter in the Universe is expanding too rapidly for the black holes to make any effect, other than on a local scale. Even the black holes in the centre of galaxies are not necessarily sucking the whole galaxy in. The speed of rotation can keep stuff out of the black hole's reach.

In fact, black holes are observable because they actually launch stuff around them outwards, at high speeds. Black holes themselves are slowly dissipating, they don't last forever.

Answer 4

Even black holes don't last forever. They give off a very small amount of radiation, and the hole gets smaller as a result. Eventually they evaporate.

Answer 5

no because a black hole is just a star that has a high gravitational pull that light cannot escape. and even it is a hole there is a theory said that if a black hole sucks matter. there is an end of that hole and it is called the white hole. a white hole is the exact opposite of the black hole because it spits out matter. so when the whole universe is sucked by a black hole it will probably end up at the white hole.

Answer 6

Won't be too long, Cern want to create one now

http://www.csmonitor.com/2003/0523/p25s0...

Answer 7

An interesting question.

Most people think of a black hole as being an incredibly dense object, with a density of millions of tonnes per cubic metre.  However, that analogy applies to a stellar black hole (ie, formed from a collapsing star).

But the bigger the object, the less dense a black hole has to be.  A large black hole, thought by many to exist at the centre of galaxies may have only the density of water - the mass is so great, that the gravitational force at the 'event horizon' is great enough to prevent light from escaping.

A black hole the size of a galaxy might only be as dense as air.

Now, it has been calculated that, if the universe were a black hole, it's density would not be much greater than the observable density of the universe.  If it could be shown that enough mass existed to close the universe (ie, that its expansion would eventually cease, and it would collapse again to a 'big crunch'), then by definition, nothing could escape, and the universe would in fact be a gigantic black hole.

We might be living inside a universe-sized black hole!

Answer 8

No,



It appears the universe is open and will not collapse into a blackhole

Answer 9

It is postulated that the universe will eventually become cold and empty save for a few black holes, which themselves will radiate to nothingness.

Answer 10

once the sun goes supernova the whole universe will be destroyed luckily we'll be long dead before that happens.  

Answer 11

Does it not depend on whether the Universe is open or closed? In other words will the gravitational forces associated with dark matter br strong enough to overcome the expansion of the Universe leading to a big crunch in about 20 billion years. (Sun has long gone)

Or will the Universe keep on expanding and you re right black holes swallowing star systems maybe galaxies and eventually "evaporating"

till there is not much left but black empty space (60 billion years)

Nobody knows!