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About LinkBacksIs the universe heading towards a big freeze,a big rip,a big crunch,or a big bounce,or is it part of an indefinitely recurring cyclic model.
September 27th, 2014, 03:44 AM
Is the universe heading towards a big freeze,a big rip,a big crunch,or a big bounce,or is it part of an indefinitely recurring cyclic model.
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Originally Posted by wikipedia
Current thinking tends, I understand, towards a freeze, or rip. This thinking will likely change a time or two over the next couple of billion years or so. Check in later.
The Big Crunch
In physical cosmology, the Big Crunch is one possible scenario for the ultimate fate of the universe, in which the metric expansion of space eventually reverses and the universe recollapses, ultimately ending as a black hole singularity or causing a reformation of the universe starting with another big bang. Sudden singularities and crunch or rip singularities at late times occur only for hypothetical matter with implausible physical properties.
https://www.google.com/url?sa=t&rct=...XUYvAwCQyEGUeg
This isn't funny. You give a flip answer to a serious question. The new member didn't deserve this. Are you trying to scare off new members? Way to go.42
@lucky star
Rob is our resident troll and should be ignored. I apologize for his behavior.
(BTW, a mod could move this science thread to a more deserving sub-forum.)
So do you think you can answer that question, what did John say something give us a couple of billion years we might have a better idea. Was his answer better?This isn't funny. You give a flip answer to a serious question. The new member didn't deserve this. Are you trying to scare off new members? Way to go.42
@lucky star
Rob is our resident troll and should be ignored. I apologize for his behavior.
(BTW, a mod could move this science thread to a more deserving sub-forum.)
Considerably better, for the following reasons:
1. My full answer was informative and, within current understanding, accurate.
2. The sub-text of my post was thoughtful and meaningful.
3. I carefully designed both format (structure) and content of my post in order to provide maximum information and provocative thoughts with minimum words.
~ Of this subject we can be speculative.. We can guess and extrapolate ideas of the Universes end..
But., To do so with the best information as yet available.. is the intention of John Galts post..
~ He is as correct as current science lets us be, and I agree.. Well said.
No trend of slowing of the observed expansion is found. So to imagine that the Universe will go on expanding into a eventual
very sparsely populated void.. Where one can 'imagine' a sky with not a single star visible.. simply because of expansion ongoing.
It's a image I can only imagine.. That we live in a time where we can see the local group of galaxies and all of this one..
I find it hard to state with clarity a end. I only imagine a slow long drift towards a cold spars space that will still contain all that it does. Just no longer within lights range to reach us.. ( Can I be understood ?)
I can imagine you writing that thinking how horrible it will be when there will not be a single star in the sky.
I never thought it would be as bad as that. The Milky Way galaxy will stay together but the other galaxies will be separated and out of view.
Did I understand that correctly?
How can you imagine there will be any stars left?
Your friend Astromark said "Where one can 'imagine' a sky with not a single star visible..".How can you imagine there will be any stars left?
Gravity will hold the Milky Way galaxy together won't it? I don't imagine the stars will disappear altogether, they may stop glowing but they will still be there radiating heat just about forever won't they?
"Forever" is rather a long time so the ultimate end is harder to imagine but we won't be here to see it, so does it really matter?
What were you getting at John? I could be wrong but those were the thoughts I had on the topic years ago, maybe they need updating. Please tell me what do you imagine?
Last edited by Robittybob1; September 27th, 2014 at 10:23 PM.
Not if the Big Rip scenario is right. All gravitationally bound systems will be ultimately torn apart if the accelerated expansion rate continues unabated and ultimately even all forms of fundamental matter itself..........however as you know, what is flavour of the month today will change tomorrow.
Last edited by Implicate Order; September 28th, 2014 at 12:09 AM.
I have never studied that hypothesis, sorry.Not if the Big Rip scenario is right. All gravitationally bound systems will be ultimately torn apart if the accelerated expansion rate continues unabated and ultimaely even all forms of fundamental matter itself..........however as you know, what is flavour of the month today will change tomorrow.
Are you aware of the 1998 astrophysical discovery of accelerated expansion?
I was aware of Hubble's work on the expanding universe, and I have heard of Dark Energy but I haven't comprehended an accelerating expansion.Are you aware of the 1998 astrophysical discovery of accelerated expansion?
Even with Hubble's discovery the further apart the galaxies were, the faster they were separating, wasn't it? That implies an acceleration, doesn't it?The most widely accepted explanation for the accelerating expansion is the existence of dark energy, a substance with negative pressure which is spread homogeneously throughout the universe.
It isn't my field of interest so I'm relatively ignorant on these topics.
Now home and with some time to revisit this for 'Bob'.. Yes The local group of Galaxies we call the 'Vergo' super cluster and now with
The 'new' Hawaiian word.. for the Larger local group. ( and I can not recall it right now..) These things are gravity bound, but it is thought that at some future point that expansion will overcome the gravity forces.. The eventual drifting apart.. accelerating expansion is the stronger force.. None of that is speculative or guess work.. Tested and as best as can be confirmed as real..
I used the word imagined when attempting to paint a scene I could see.. The concept is firm. How long will this take ?
and that we ( humanity ) need not worry unduly.. we are talking of hundreds of billions of years.. Can we imagine billions of billions..
but we should also understand that future discovery may change this future view..
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