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"The Universe is Shrinking" --Bold New Theory Challenges Standard View

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  • derhexerus
    Shrinking? Expanding? I wonder if my homeowners insurance will cover either or only one. Chris ____________________________________ From: vlandi@yahoo.com
    Message 1 of 1 , Aug 18 4:45 PM
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      Shrinking? Expanding? I wonder if my homeowners insurance will cover
      either or only one.

      Chris



      ____________________________________
      From: vlandi@...
      To: derhexer@...
      Sent: 8/18/2013 6:10:50 P.M. Eastern Daylight Time
      Subj: The Daily Galaxy: News from Planet Earth & Beyond



      _The Daily Galaxy: News from Planet Earth & Beyond_
      (http://www.dailygalaxy.com/my_weblog/)

      ____________________________________
      _"The Universe is Shrinking" --Bold New Theory Challenges Standard View of
      an Expanding Cosmos_
      (http://feedproxy.google.com/~r/TheDailyGalaxyNewsFromPlanetEarthBeyond/~3/_8RSAq32dYg/the-universe-is-shrinking-a-radical-new-theo
      ry-challenges-accepted-view-of-an-expanding-cosmos.html?utm_source=feedburne
      r&utm_medium=email)
      Posted: 18 Aug 2013 08:08 AM PDT


      (http://www.dailygalaxy.com/.a/6a00d8341bf7f753ef019104d21645970c-pi)
      The most widely accepted _theory of the universe_
      (http://en.wikipedia.org/wiki/Universe) is based on the notion that the world started with a big
      bang, and has been expanding ever since. But, in a radical new view, the
      Universe in not expanding according to a _Christof Wetterich_
      (http://en.wikipedia.org/wiki/Christof_Wetterich) , a theoretical physicist at the University
      of Heidelberg in Germany who has devised a different cosmology in which
      the Universe is not expanding but posits that the mass of everything has been
      increasing. His theory could help physicists to understand problematic
      issues such as the so-called singularity present at the _Big Bang_
      (http://en.wikipedia.org/wiki/Big_Bang) .In his paper: A Universe Without Expansion,
      Wettrich discusses a _cosmological model_
      (http://en.wikipedia.org/wiki/Physical_cosmology) "where the universe shrinks rather than expands during the
      radiation and matter dominated periods".
      In his abstract of his paper published on the _arXiv_ (http://arxiv.org/)
      preprint server, he writes: "Only dimensionless ratios as the distance
      between galaxies divided by the atom radius are observable. The cosmological
      increase of this ratio can also be attributed to shrinking atoms."
      “The field of cosmology these days is converging on a standard model,
      centred around inflation and the Big Bang,” says physicist Arjun Berera at the
      University of Edinburgh, UK. “This is why it’s as important as ever,
      before we get too comfortable, to see if there are alternative explanations
      consistent with all known observation.”
      Cosmologists envisage the Universe as expanding, says Niayesh Afshordi, an
      astrophysicist at the Perimeter Institute in Waterloo, Canada, only
      because it is the most convenient interpretation of galaxies' redshift.
      In the 1920s, astronomers including _Georges Lemaître_
      (http://en.wikipedia.org/wiki/Georges_Lema%c3%aetre) and Edwin Hubble analysed the light emitted or
      absorbed by atoms, which appeared in a spectrum of characteristic colours,
      or frequencies. When matter moved away, they discovered that galaxies
      exhibited a shift to the red, lower frequency part of the spectrum.nAfter
      observing that most galaxies exhibit a red shift that became greater for more
      distant galaxies, they theorised that the universe was expanding. The Hubble
      image at the top of the page shows a gravitationally lensed image of the
      highest known redshift galaxy.
      However, Wetterich highlights that this light emitted by atoms is also
      determined by masses of the elementary particles, and in particular, their
      electrons.If the mass of an atom increases, it emits more energetic photons.
      If the particles were to become lighter, frequencies would become
      redshifted.
      In _Nature News_ (http://www.nature.com/nature/index.html) , Jon Cartwright
      explains: “Because the speed of light is finite, when we look at distant
      galaxies we are looking backwards in time — seeing them as they would have
      been when they emitted the light that we observe. If all masses were once
      lower, and had been constantly increasing, the colours of old galaxies would
      look redshifted in comparison to current frequencies, and the amount of
      redshift would be proportionate to their distances from Earth. Thus, the
      redshift would make galaxies seem to be receding even if they were not.”
      In Wetterich's alternative interpretation of redshift all of cosmology
      looks very different: The Universe still expands rapidly during a short-lived
      period known as inflation. But prior to inflation the Big Bang no longer
      contains a 'singularity' where the density of the Universe would be infinite.
      Instead, the Big Bang stretches out in the past over an essentially
      infinite period of time. “The current cosmos could be static or even beginning to
      contract,” he adds.
      But, reports Nature.com, the one huge problem wih Wetterich's theory is
      that it can't be tested. Mass is what’s known as a dimensional quantity, and
      can be measured only relative to something else. For instance, every mass
      on Earth is ultimately determined relative to a kilogram standard that sits
      in a vault on the outskirts of Paris, at the _International Bureau of
      Weights and Measures_ (http://www.bipm.org/en/home/) . If the mass of everything
      — including the official kilogramme — has been growing proportionally
      over time, there could be no way to find out.
      Wetterich says that his interpretation could be useful for thinking about
      different cosmological models, in the same way that physicists use
      different interpretations of quantum mechanics that are all mathematically
      consistent. In particular, Wetterich says, the lack of a Big Bang singularity is a
      major advantage.
      Nature doi:10.1038/nature.2013.13379 Related articles


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      (http://www.dailygalaxy.com/my_weblog/2013/07/image-of-the-day-our-lopsided-universe-is-darker-lighter-slower-older-more-mysterious-than-we-though.html
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      han-we-though.html)


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