Can A Black Hole End The Universe?

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Discussion Overview

The discussion revolves around the hypothetical scenario of whether a super giant and massive black hole could end the universe. Participants explore various implications, theories, and thought experiments related to black holes, cosmic forces, and the fate of the universe.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification
  • Speculative reasoning

Main Points Raised

  • Some participants question the premise of a black hole ending the universe, suggesting that the gravitational effects of a black hole at a distance are negligible.
  • One participant proposes a scenario where if the universe were swallowed by a black hole, it would not be aware of it until significant destruction occurred, leading to a decaying orbit around the black hole.
  • Another participant speculates that a black hole could theoretically slow down the universe's expansion, but acknowledges this idea as unconventional.
  • A counterpoint is made that the universe's expansion is driven by dark energy, which would not be countered by the mass of a black hole, regardless of its size.
  • There is a correction regarding the forces acting on bodies, with a participant emphasizing the role of electromagnetic force instead of electro-static force in the context of cosmic interactions.

Areas of Agreement / Disagreement

Participants express differing views on the potential of a black hole to end the universe, with some arguing against the possibility and others presenting speculative scenarios. The discussion remains unresolved, with multiple competing views present.

Contextual Notes

Participants reference various physical principles, such as Newton's laws and the effects of dark energy, but there are unresolved assumptions regarding the nature of black holes and their influence on cosmic dynamics.

HIGHLYTOXIC
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CAN IT BE POSSIBLE THAT A SUPER GIANT AND MASSIVE BLACK HOLE END THE UNIVERSE?

WHAT IF WE DISCOVER ONE SUCH BLACK HOLE IN OUR GALAXY?
 
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Originally posted by HIGHLYTOXIC
CAN IT BE POSSIBLE THAT A SUPER GIANT AND MASSIVE BLACK HOLE END THE UNIVERSE?

WHAT IF WE DISCOVER ONE SUCH BLACK HOLE IN OUR GALAXY?

Why should a super-giant and a super-massive black hole (I assume you mean super-massive as all black holes are massive i.e. they have mass)the universe? That said I wouldn't like to be anywhere near a supergiant being swallowed by a black hole as the radiation from the accretion disc might well turn it into an active galatic nuclei.

Incidentaly it is strongly believed that there is a supermassive black hole (about 400 million solar masses from the most recent estimates)at the centre of our galaxy, though it is not (currently at least) an active galactic nuclei.
 
if we all (the universe) got swallowed up by a black hole at the same time, we'd never know, and OUR universe would last forever.
 
We would know about it, as we got drawn towards it, first we wound notice the destruction that it would be causing around it.
Then we'd go into a decaying orbit around the hole (along with our sun).
Then the world would be ripped apart from the immense force of gravity acting on the Earth and at the same time we would be hit by many bits of other galactic mass (planets, meteors etc.), we'd probably have been dead for a while by now.
Then, finally, once we'd been stretched out into long thin spaghetti, we'd be atomised, pass the event horizon and for what would seem to be an infinite amount of time we would fall towards the singularity.

So yes, in one respect the universe would last forever, however I think that we would know what hit us a while before it did. If a black hole did approach our solar system, we'd notice it's effect on the palnets and the sun long before it got here.
On the plus side, we'd be able to take all sorts of measurements about it's gravitational field strength, the diameter of the event horizon and all sorts of other stuff that I don't even know about yet.
 
here's a sci fi thought let's say the more universe evolve with the speed of light or with some speed near the spead of light and we know that the mass increases while you increase the velocity (thus the body [the universe] tries to stop moving in this speed) the slow in the speed is due to the creation within the universe of a black hole that tries to stop the universe itself from speed up and to bring it back to the beginning when there was nothing no time.
now let's say this black hole has begun its process not at the same time of the big bang but at Planck time this way the black hole can never swallow the entire universe unless a mysterious energy will increase it's volume.

be gentle with me :wink: it's crap but an innovative crap
 
According to Newton, a body will continue to travel at a constant speed or stay at rest, unless an external force acts on it. There are a maximum of four forces acting on a body at anyone time. The strong and weak nuclear force, the electro-static force and gravity. I don't see any reason for the universe to create a black hole out of spite, just to try and stop things moving.
 
Back to the question...

CAN IT BE POSSIBLE THAT A SUPER GIANT AND MASSIVE BLACK HOLE END THE UNIVERSE?

NO.

Why? Because contrary to popular opinion, something turning into a black hole has almost no effect on it's gravitational attraction at longer distances. And we know that currently, all the mass in the universe is insufficient to counter the expansive force of "dark energy", which is in fact accelerating the expansion of the universe. This means that even if all the mass in the entire universe collapsed into a singularity, it will not be enough to pull it all back in. Besides, in such a case we would have far more pressing matters to worry about... :wink:

If I remember correctly, of course.
 
Originally posted by TonySlim
if we all (the universe) got swallowed up by a black hole at the same time, we'd never know, and OUR universe would last forever.

That is incorrect; from our point of view we would meet the singularity in a finite period of time.
 
Originally posted by lavalamp
the electro-static force and gravity. I don't see any reason for the universe to create a black hole out of spite, just to try and stop things moving.
it's the electromagnet force.
 

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