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  1. #1
    steppenvalve's Avatar
    steppenvalve Guest

    Default Hubble Ultra Deep Field image

    Rodney Kelp wrote:
    galaxies we
    now, that

    The current (July 2004) issue of Wired, p.49, says the furthest we'll
    ever see is 15 billion light years. The assumtion is that that's how
    old the universe is and light simply can't be older than that. I don't
    think that's quite right, though. The light from the Big Bang should be
    spreading faster than the matter did, and we were a part of it, so
    light from stuff on the other side of the Bang has already passed us.
    I'm sure we're not on the edge of the Bang, but probably somewhere
    closer to the middle. (?)

    Which brings up the interesting posibility of someone on a planet on
    the edge of a galexy, on the edge of a galactic cluster, on the edge of
    one of these "bubble" superstructures. Can you imagine looking up at an
    empty sky for half the year? You couldn't see galexies on the other
    side of the bubble, could you?

  2. #2
    Alain Fournier's Avatar
    Alain Fournier Guest

    Default Hubble Ultra Deep Field image

    steppenvalve wrote:

    That isn't how the expansion of the universe works. The galaxies
    weren't pushed away from one another by the big bang. Space is
    being created between the galaxies which makes them look as if they
    were pushed apart. There is no edge of the Universe. There is no
    place where one side is empty sky and the other side is full of
    stars and galaxies. We will never see light from the big bang
    itself for the same reason we can't see light from the core of the
    sun, matter was to dense at the time to let light come out. But
    light from 100 million years later we can see it is called the
    background radiation (the 100 million years number is from memory
    it might not be correct). It isn't because we are on the edge of
    the universe that we can see background radiation, it can be seen
    from any place in the universe (well any place where you can see
    galaxies, of course you can't see if you can't see the sky).

    Alain Fournier

  3. #3
    Richard L. Hamilton's Avatar
    Richard L. Hamilton Guest

    Default Hubble Ultra Deep Field image

    In article <ce8d2r$>,
    "steppenvalve" <> writes:

    Taking the usual expanding balloon analogy, we're all on the edge;
    the edge is "now", and inwards is actually the past.


    Lasik/PRK theme music:
    "In the Hall of the Mountain King", from "Peer Gynt"

  4. #4
    meteor's Avatar
    meteor Guest

    Default Hubble Ultra Deep Field image

    Alain Fournier <> wrote in message news:<kGYNc.342$>.. .

    Alain Fournier:
    the 100 million years number is from memory

    In fact, the CMB decoupled 300000-380000 years after Big Bang



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