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  • Universe exceeding speed limit?

    Latest observations of the background radiation from the big bang shows the universe expanding faster than current physics theory says it should
    https://www.bbc.co.uk/news/av/scienc...s-don-t-add-up
    Last edited by MarkV; 26 Apr 19, 08:33.
    Human history becomes more and more a race between education and catastrophe (H G Wells)
    Mit der Dummheit kaempfen Goetter selbst vergebens (Friedrich von Schiller)

  • #2
    For those interested in a bit more text ...

    The Universe Is Expanding So Fast We Might Need New Physics to Explain It
    Two measurements of the Hubble constant disagree.
    ...
    The universe is expanding faster than expected, suggesting that astronomers may have to incorporate some new physics into their theories of how the cosmos works, a new study reports.

    The revised expansion rate is about 10% faster than that predicted by observations of the universe's trajectory shortly after the Big Bang, according to the new research. The study also significantly reduces the probability that this disparity is a coincidence, from 1 in 3,000 to just 1 in 100,000.

    "This mismatch has been growing and has now reached a point that is really impossible to dismiss as a fluke," study lead author Adam Riess, a professor of physics and astronomy at The Johns Hopkins University in Baltimore, said in a statement.

    "This is not what we expected," said Riess, who won the Nobel Prize for physics in 2011 (along with Brian Schmidt and Saul Perlmutter) for showing, in the late 1990s, that the universe's expansion is accelerating. It's unclear what's driving this surprising acceleration, but many astronomers invoke a mysterious, repulsive force called dark energy.
    ...
    In the new study, Riess and his colleagues used the Hubble Space Telescope to study 70 Cepheid variable stars in the Large Magellanic Cloud (LMC), one of the Milky Way's satellite galaxies. Cepheid variables dim and brighten at predictable rates and are therefore "standard candles" that allow astronomers to calculate distances.
    ...
    "This is not just two experiments disagreeing. We are measuring something fundamentally different," Riess said.

    "One is a measurement of how fast the universe is expanding today, as we see it. The other is a prediction based on the physics of the early universe and on measurements of how fast it ought to be expanding," he added. "If these values don’t agree, there becomes a very strong likelihood that we’re missing something in the cosmological model that connects the two eras."
    ...
    https://www.space.com/universe-expan...w-physics.html
    TANSTAAFL = There Ain't No Such Thing As A Free Lunch

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    • #3
      The universe is colossally indifferent to our "limits' or "science". It does what it does.
      Quis Custodiet Ipsos Custodes? Who is watching the watchers?

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      • #4
        Originally posted by Mountain Man View Post
        The universe is colossally indifferent to our "limits' or "science". It does what it does.
        And those not living in the dark ages strive to understand why
        Human history becomes more and more a race between education and catastrophe (H G Wells)
        Mit der Dummheit kaempfen Goetter selbst vergebens (Friedrich von Schiller)

        Comment

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