Alex Torex Blog

SciTech oriented blog

How the Big Crunch Theory Works

science.howstuffworks.com:
….
Clearly, there’s no easy answer when it comes to predicting the fate of the universe. But let’s imagine for a ­moment th­at the density of the universe is above the critical value required to stop expansion. This would lead to the big crunch, which in many ways would be like hitting the rewind button on a VCR. As gravity within the universe pulled everything back, galaxy clusters would draw closer together. Then individual galaxies would begin to merge until, after billions of years, one mega-galaxy would form.

Inside this gigantic cauldron, stars would meld together, causing all of space to become hotter than the sun. Eventually, stars would explode and black holes would emerge, slowly at first and then more rapidly. As the end drew near, the black holes would suck up everything around them. Even they would coalesce at some point to form a monstrous black hole that would pull the universe closed like a drawstring bag. At the end, nothing would remain but a super-hot, super-dense singularity — the seed of another universe. Many astronomers think the seed would germinate in a “big bounce,” starting the whole process over again.

That’s not the only theory. A few cosmologists, led by Paul J. Steinhardt of Princeton University and Neil Turok of Cambridge University, have recently argued that the big chill and the big crunch are not mutually exclusive. Their model works like this: The universe began with the big bang, which was followed by a period of slow expansion and gradual accumulation of dark energy. This is where we are today. What happens next is highly speculative, but Steinhardt and Turok believe that the dark energy will continue to accumulate and, as it does, will stimulate cosmic acceleration. The universe won’t ever stop expanding, but will spread out over trillions of years, stretching all matter and energy to such an extreme that our one universe will be separated into multiple universes. Inside these universes, the mysterious dark energy will materialize into normal matter and radiation. This will trigger another big bang — perhaps several of them — and another cycle of expansion.

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March 14, 2009 - Posted by | Cosmology

5 Comments »

  1. [...] gravity to retard and reverse expansion leading to a super black hole colloquially called a Big Crunch (opposite of the Big [...]

    Pingback by The Matrix of the Real | Caramel Whistle | April 17, 2009 | Reply

  2. And if there was no Big Bang? – No beginning? – No Big Crunch? – No cosmic evolution but instead simple recycling of matter/energy? – Therefore, a boundless universe – eternity – conservation. What then?

    The universe exists – It is continuously dynamic – It works perfectly. Why wouldn’t it?

    Which is easier to believe – The whole universe was contained in something smaller than an atom? or the universe is boundless?

    Comment by David - genesis continuous | October 18, 2009 | Reply

  3. There is huge scientific evidence for Big Bang.
    However there is no certainty that the seed of the big bang was smaller than an atom.

    Comment by alextorex | October 18, 2009 | Reply

  4. Evidence? What is evidence? Background radiation. Sure, why not? The background exists. Different sorts of energy? Why not? There’s lots to be discovered yet.

    Why Big Bang is Nonsense.
    A boundary between the containment of the universe and no space, suggests that nothing exists beyond that boundary. Galaxies thirteen billion light years away are said to be the oldest in the universe and their light has taken thirteen billion years to reach us.
    However, one important factor is left out.
    [1] Stars shine globally. Look upon every star as the hub of a huge ball of light of its own making, and some of those balls will be twenty six billion light years in diameter.
    In the case of stars thirteen billion light years away not only do their light rays strike the earth as if shone from a torch, but potentially everything else that is in line of contact within a thirteen billion light year radius of them. – and that’s beyond the perceived boundary.
    That one revelation must surely show that there is nothing to prevent energy and matter moving away beyond that man made boundary from within our visible cosmic containment and likewise, energy and matter moving from beyond into the space occupied by this assumed containment. Of course I could be wrong, but only if Science can prove that there is a wall or some such barrier to keep our stuff in and any outside stuff out.
    There did not have to be a beginning, and there cannot be an end. There will be continuous evolution which is collectively the physical pathway of creation and re-creation of everything within a boundless playground of infinite energy and wonder. It exists and so do we. Enjoy.

    David

    Comment by David Calder Hardy | April 29, 2010 | Reply

  5. My theory on expansion is pretend you have 1000 stones of difrent sizes in spiral shape in the center you have the heart of you spiral the birth place of new matter gas and in the middle you have you body gaurds to watch protect and basicaly work together to protect a everything that makes the galexy work aka nutrinos”dark matter”.the more the center of the axis grows the more matter pushed out and more matter pushed in a spiral the bigger the area coverd by the spiral needs to be.the reason for this in my opinion is one of 2 theories 1: expand to form a larger impact area farther from the heart of the galaxy . 2: The larger the the galay gets the easier for andromida and our galaxy to merge organized and peacfuly basicaly the stronger pull will pull the scatterd gallexy into its pull with out a collision like a traffic cop kindathink about it u have a cluster of 100 rocks tight together harder to merge another cluster in with out colision but spread out over 1 mile 600 rocks and pull a smaller cluster u can orginize the 700 rocks with out collision .i feel nutrinos “ghost particals” play a huge roll in this because basicaly they can pull and place with out collision dark matter becomes after nutrinos cluster so also can become agressive if needed for demolition of parts that wont fit in the puzzle.

    Comment by carl bancroft | November 3, 2010 | Reply


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