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Thread: Educated guess on the likelyhood of the big crunch?

  1. #1 Educated guess on the likelyhood of the big crunch? 
    Forum Ph.D. Raziell's Avatar
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    I was wondering if those of you with the brains here when it comes to physics could give an educated guess on the likelyhood of the big crunch theory being true.

    I mean if there was ever a point where nothing changed (No time) we would never exist. For the universe to exist only once is a ridiculous concept in my opinion. The proccess of change cant happen from nothing either so either there is an eternal cycle or there is no cycle right?


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  3. #2 Re: Educated guess on the likelyhood of the big crunch? 
    Moderator Moderator Janus's Avatar
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    Quote Originally Posted by Raziell
    I was wondering if those of you with the brains here when it comes to physics could give an educated guess on the likelyhood of the big crunch theory being true.
    From the present evidence available, not very likely.

    I mean if there was ever a point where nothing changed (No time) we would never exist. For the universe to exist only once is a ridiculous concept in my opinion. The proccess of change cant happen from nothing either so either there is an eternal cycle or there is no cycle right?
    To be quite frank, reality doesn't care about your opinion. The Universe is as it is, and if that means that it is a one-shot deal, then such is the case.


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    The heated mind resents the chill touch & relentless scrutiny of logic"-W.E. Gladstone


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  4. #3  
    Forum Radioactive Isotope MagiMaster's Avatar
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    The Big Crunch is what would happen if gravity wins and begins pulling everything back together. Not only does it look like that's not happening; the expansion is actually speeding up. There is currently no evidence that the Big Crunch is still a possiblity. The question now is, will it be the Big Rip (expansion wins, big time) or the Big Freeze (thermodynamics ultimately wins).

    Also, I should warn you that many people fail first and hardest when they try to apply common sense and intuition to physics. That used to work, but it hasn't for the past 50 years or so. The universe is much stranger than most humans can imagine.
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  5. #4  
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    I know nothing about physics. How is the universe expanding? Explain the process please.
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  6. #5  
    Moderator Moderator Dishmaster's Avatar
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    Quote Originally Posted by gottspieler
    I know nothing about physics. How is the universe expanding? Explain the process please.
    Nobody knows. But it is clearly not the result of an explosion as it is often imagined. In that respect, "Big Bang" is a bad term.
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  7. #6 Re: Educated guess on the likelyhood of the big crunch? 
    . DrRocket's Avatar
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    Quote Originally Posted by Raziell
    I was wondering if those of you with the brains here when it comes to physics could give an educated guess on the likelyhood of the big crunch theory being true.

    I mean if there was ever a point where nothing changed (No time) we would never exist. For the universe to exist only once is a ridiculous concept in my opinion. The proccess of change cant happen from nothing either so either there is an eternal cycle or there is no cycle right?
    The current data indicates that the expansion of the universe is not only continuing unabated, but is actually accelerating. The current explanation is a bit tenuous, but the name is "dark energy".

    Assuming that this notion holds up to further scrutiny, and seems to be doing that, there will be no "Big Crunch".
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  8. #7  
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    Though I agree that the evidence points to another theory than the Big Crunch, this does not rule it out. There is no way to know if the force that is accelerating the universe's expansion now will decelerate billions of years from now, to the point where a crunch begins. "Dark energy" is a name scientists used because they have no idea what it is, or how it works, thusly it would be a bit odd to make bombastic claims about the future based on it.
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  9. #8  
    Forum Ph.D. Raziell's Avatar
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    Apophasis that is what i thought aswell. Just because it is accelerating now dont mean it wont contract later?
    A lie is a lie even if everyone believes it. The truth is the truth even if nobody believes it. - David Stevens
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  10. #9  
    Forum Radioactive Isotope MagiMaster's Avatar
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    There's no evidence that that might happen, so the possibility should be considered remote, at least until the available evidence changes.
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  11. #10  
    Forum Freshman ThaCrow187's Avatar
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    Ok, My wife told me something I thought was rather funy yet true. I'm a Observer, I like to watch what everyone is doing and make my own assumptions from these observations, BUT Most True Scientist I read or watch things about tend to assume OUR Universe was the FIRST and before the Big Bang there couldnt have been anythng else. BUT if what i was wondering about Black Hole sucking in Matter to a Singularity which poke threw the Emptyness beyond our universe and starts to form the singularity known to exist .000000001 before the universe expanded equaly in all directions. But they say NO No No, Well Why do we have to be the First, and until we figure out how to backtrack Threw Our Big Bang and threw the Black Hole that formed our universe, and then threw that one and there big bang and black hole and so on and so on, until you finally find a trillion unvirses ago was the real firrst big bang, but yadayad yada.. Why do we have to be the first?
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  12. #11  
    Universal Mind John Galt's Avatar
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    Quote Originally Posted by ThaCrow187
    BUT Most True Scientist I read or watch things about tend to assume OUR Universe was the FIRST and before the Big Bang there couldnt have been anythng else.
    True scientists publish their results in scientific journals. Before they do so they present their ideas to fellow scientists who try to pick out flaws in their thinking. Once they submit their papers to the journals for publication they undergo a process called peer review. In this process experts in their field study the paper and decide whether or not it meets the criteria of good science.

    If you look at the research papers of this type I think you will find it very difficult to find any scientist who declares that our universe was the first. Rather they will fall into two camps: one will declare that we are most certainly not the first; the other will state that we do not yet have enough information to decide. No one will make the argument you think they are making.
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