How will the universe end - with a bang or with a whimper?

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Profile Lynn Special Project $75 donor
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Message 1516318 - Posted: 15 May 2014, 1:22:39 UTC

Earth's future - and the end of the universe - revealed: Amazing simulation shows how EVERYTHING will end

Video called 'The Far Future of the Universe' looks ahead trillions of years
It takes a look at the 'open universe' scenario for the cosmos
This would see the universe continuing to expand until nothing is left
It also describes how our planet will be almost dead in just 1 billion years
And in 110 trillion years all the stars in the cosmos will have died out


http://www.dailymail.co.uk/sciencetech/article-2628033/The-Earths-future-end-Universe-revealed-Amazing-simulation-shows-EVERYTHING-end.html


Just a simulation.
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Message 1516351 - Posted: 15 May 2014, 2:43:21 UTC

The Universe will not end; it will eventually contract and then another big bang. Give me a minute to work out the math.
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Message 1516361 - Posted: 15 May 2014, 3:25:45 UTC - in response to Message 1516318.  

My guess is "with a whimper". My understanding is that eventually all nuclear fuels will be converted into non-fusionable elements and there will be no new stars formed. All heat will be radiated, all protons will decay, all black holes will radiate their mass via Hawking radiation and we will reach a state of thermodynamic equilibrium i.e. there will be no free energy left in the universe because everything is the same temperature. Maximum entropy will have been reached, and even though there will still be space there will be nothing happening in that space. Or perhaps dark energy will separate all atoms into their constituent particles before then. I haven't the faintest clue what will happen to the space-time on which our universe is embedded. Maybe someone can correct whatever mistakes i have made in my reply and tell me what will happen to space-time also?
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Message 1516447 - Posted: 15 May 2014, 10:58:19 UTC - in response to Message 1516351.  

The Universe will not end; it will eventually contract and then another big bang. Give me a minute to work out the math.



That just one of the theories... Another theory is the one of the 'big freeze':

http://www.whillyard.com/science-pages/big-freeze.html
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Message 1516680 - Posted: 15 May 2014, 19:25:22 UTC - in response to Message 1516447.  

Ah yes, the link you posted is pretty much what i said above. "Big Freeze" is new terminology to me, i was taught the phrase "heat death" of the universe but they amount to the same thing. Pretty much based on the second law of thermodynamics, the net entropy of the universe always rises.
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Message 1516682 - Posted: 15 May 2014, 19:30:58 UTC

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Message 1516697 - Posted: 15 May 2014, 19:45:13 UTC - in response to Message 1516680.  
Last modified: 15 May 2014, 19:45:41 UTC

Ah yes, the link you posted is pretty much what i said above. "Big Freeze" is new terminology to me, i was taught the phrase "heat death" of the universe but they amount to the same thing. Pretty much based on the second law of thermodynamics, the net entropy of the universe always rises.


That is why I "believe" in a pulsating Universe with an endless cycle of rebirth. "Heat death" is death; rebirth or death, the choice is yours.

Send your tithes and offerings now to insure rebirth.
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Message 1516700 - Posted: 15 May 2014, 19:49:59 UTC

Is that your dog? He looks just like Zoe, my BF's dog:) Striking resemblance. Nice pic:)
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Message 1516773 - Posted: 15 May 2014, 23:18:45 UTC - in response to Message 1516700.  

Is that your dog? He looks just like Zoe, my BF's dog:) Striking resemblance. Nice pic:)

Both belong to my son; when he moved back they came as a package deal.
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Message 1516780 - Posted: 15 May 2014, 23:55:33 UTC - in response to Message 1516773.  

The Universe will not end; it will eventually contract and then another big bang.

I agree with the above.
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Message 1516792 - Posted: 16 May 2014, 1:12:12 UTC

I have always thought that the cyclic universe was the most elegant of the theories but if you believe the current theories of the scientific world everything will dissipate to nothing. Whichever theory is true I know I won't be around to witness it and I don't see where knowing now what will happens billions of years from now would change anything.
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Message 1516815 - Posted: 16 May 2014, 2:53:39 UTC - in response to Message 1516792.  

The thing with a big crunch theory that i can't reconcile is where does dark energy fit in? I seems that our observations are pointing towards a universe that is not only expanding but accelerating in it's expansion. I guess there are theories that say that the dark energy of the past and the future might not have the same value as it does now but do we have any evidence yet to verify that? I don't know that's why i'm asking. Plus, if everything in the universe were to come back to a point, like that at the moment before the big bang, wouldn't that be a reversal of entropy? We would be going from a higher entropy state with everything spreading to a lower entropy state where everything is in the same place which seems to contradict the second law of thermodynamics. I know that if there was enough mass/gravity, and no dark energy, that is exactly what would happen but don't our current observations point towards an ever expanding universe?
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Message 1516850 - Posted: 16 May 2014, 4:10:14 UTC - in response to Message 1516792.  
Last modified: 16 May 2014, 4:12:23 UTC

Whichever theory is true I know I won't be around to witness it and I don't see where knowing now what will happens billions of years from now would change anything.

Really? If everything started as a singularity you were there. If the Universe doesn't contract and bang again it will burn out to a cold nothingness taking us with it. We are here, how and why no one knows. If the Universe is one it must be like Earth where things just don't happen without a cause. If I want to move a rock it will take effort and energy. The Universe must have taken effort and energy to be.

Why all the effort and energy just to drift off to a cold nothingness. Why does the Universe exists? I don't know but it does exists. It may just be prolonging the inevitable but a pulsating Universe gives me, perhaps, more time.

I won't get into us not being just one being with my thoughts on how we can live as what we consider us with another's heart pumping our blood.

The thing with a big crunch theory that i can't reconcile is where does dark energy fit in?

Some think dark matter will supply the mass to pull the Universe back together.
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Message 1516942 - Posted: 16 May 2014, 12:03:23 UTC

Maybe the molecules and atoms that make up my body were there at the beginning but I'm pretty sure I only came on the scene 64+ years ago not being a believer in reincarnation.
Bob DeWoody

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Message 1516948 - Posted: 16 May 2014, 12:30:25 UTC - in response to Message 1516773.  

Is that your dog? He looks just like Zoe, my BF's dog:) Striking resemblance. Nice pic:)

Both belong to my son; when he moved back they came as a package deal.



They're both lovely:)
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Message 1516950 - Posted: 16 May 2014, 12:35:05 UTC - in response to Message 1516850.  
Last modified: 16 May 2014, 12:45:34 UTC

Whichever theory is true I know I won't be around to witness it and I don't see where knowing now what will happens billions of years from now would change anything.

Really? If everything started as a singularity you were there. If the Universe doesn't contract and bang again it will burn out to a cold nothingness taking us with it. We are here, how and why no one knows. If the Universe is one it must be like Earth where things just don't happen without a cause. If I want to move a rock it will take effort and energy. The Universe must have taken effort and energy to be.

Why all the effort and energy just to drift off to a cold nothingness. Why does the Universe exists? I don't know but it does exists. It may just be prolonging the inevitable but a pulsating Universe gives me, perhaps, more time.

I won't get into us not being just one being with my thoughts on how we can live as what we consider us with another's heart pumping our blood.

The thing with a big crunch theory that i can't reconcile is where does dark energy fit in?

Some think dark matter will supply the mass to pull the Universe back together.



But then we have the dark energy that does just the opposite? And the Universe is divided in 70% dark energy whilst dark matter is only 25%?
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Message 1516965 - Posted: 16 May 2014, 14:07:51 UTC - in response to Message 1516953.  
Last modified: 16 May 2014, 14:08:23 UTC

Why does the Universe exists?


That of course is THE question; one that may never be answered.

We may hope to answer HOW and if we are alone if we continue our efforts in science and astronomy.

I do worry that we most probably are not alone but that we may never find anyone else because of truly astronomical distances between us.
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Message 1516990 - Posted: 16 May 2014, 15:20:05 UTC - in response to Message 1516976.  

I do worry

Why? You and I will never know one way or the other in our lifetimes, whether anyone else exists out there. So what? If we find them we do, if not we don't. In the meantime this life of ours that we do have here and now, is rather more important.


+1
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Message 1517045 - Posted: 16 May 2014, 16:53:34 UTC - in response to Message 1516850.  
Last modified: 16 May 2014, 17:01:02 UTC

The thing with a big crunch theory that i can't reconcile is where does dark energy fit in?

Some think dark matter will supply the mass to pull the Universe back together.



Batter Up, i know you didn't say it was your belief but you might be able to answer my question.
Dark energy is already stronger than all matter and dark matter combined (by stronger i mean it is pushing/pulling everything apart in spite of all other matter), so unless the universe is converting dark energy into dark matter i don't see how that could happen. But again, i'm not really up to speed on all the latest theories so if someone knows where this extra dark matter would come from please elaborate.
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Message 1517051 - Posted: 16 May 2014, 16:58:22 UTC - in response to Message 1517045.  

The thing with a big crunch theory that i can't reconcile is where does dark energy fit in?

Some think dark matter will supply the mass to pull the Universe back together.



But dark energy is already stronger than all matter and dark matter combined (by stronger i mean it is pushing/pulling everything apart in spite of all other matter), so unless the universe is converting dark energy into dark matter i don't see how that could happen. But again, i'm not really up to speed on all the latest theories so if someone knows where this extra dark matter would come from please elaborate.



+1
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Message boards : SETI@home Science : How will the universe end - with a bang or with a whimper?


 
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