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  1. #1
    timbo's Avatar
    timbo Guest

    Default Size of the universe vs. c



    Hi there. Newbie to this forum here.

    This is a question that's been bugging me for ages. I gather that
    measurements of the microwave background radiation indicate that the
    universe is at least 60-80 billion light years across. But the big bang
    theory tells us that the universe started from a point just 13-14
    billion years old.

    Given that the speed of light is the limit, how has the universe managed
    to get to its current size in the time available? I'm imagining two
    particles which started off very shortly after the initial singularity
    and headed in opposite directions at nearly c for the entire lifetime of
    the universe; how could they currently be more than 13-14 billion light
    years apart?


  2. #2
    timbo's Avatar
    timbo Guest

    Default Size of the universe vs. c

    Oops - on second thoughts, relative to us, the two particles could be
    26-28 billion light years apart. But the question remains...


  3. #3
    Greg Neill's Avatar
    Greg Neill Guest

    Default Size of the universe vs. c

    "timbo" <no.replies@here.com> wrote in message
    news:4ojrc.20$c74.16@newsfe1-gui.server.ntli.net...

    c is the limit for things moving in space. Space itself does
    not suffer this restriction, so distant regions of space can
    be separating at speeds greater than c, carrying their
    material contents (and immaterial ones too) along with them
    for the ride.

    It is thought that in the first moments of the Big Bang, during
    what is known as the Inflation Era, the universe expanded at
    rates much, much higher than c.



  4. #4
    Mike Ruskai's Avatar
    Mike Ruskai Guest

    Default Size of the universe vs. c

    On Fri, 21 May 2004 08:48:28 +0100, timbo wrote:


    The expansion of the universe is not matter moving. It's space expanding.
    No known speed limit on that.




    --
    - Mike

    Remove 'spambegone.net' and reverse to send e-mail.



  5. #5
    JANET's Avatar
    JANET Guest

    Default Size of the universe vs. c


    "Mike Ruskai" <spamten.knilhtrae@begonedynnaht.net> wrote in message
    news:gunaalqrneguyvaxarg.hy56x00.pminews@news.east .earthlink.net...
    is the edge defined?





  6. #6
    EvolBob's Avatar
    EvolBob Guest

    Default Size of the universe vs. c

    >But presumably there is something at the edge,matter or >energy, how else

    I'm tempted ...


    ok I give up ... you do Jane!

    "JANET" <mail@eftalou.freeserve.co.uk> wrote in message news:c983qd$fg5$1@news7.svr.pol.co.uk...



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