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Hubble clocks faster cosmic expansion

Tank

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Hubble clocks faster cosmic expansion
« on: June 05, 2016, 12:32:58 PM »
Hubble clocks faster cosmic expansion

The Hubble constant is used in the estimation of the age of the universe thus if the constant is inaccurate our estimate of the age of the universe is incorrect.

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The work gives a number for the Hubble Constant of 73.24 kilometres per second per megaparsec (a megaparsec is 3.26 million light-years)....

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Its Hubble Constant value was 66.53km/s per megaparsec.

The disagreement with Dr Riess's number is more than just a minor inconvenience. When using the Hubble Constant to calculate the time from the Big Bang, the offset equates to a difference of a few hundred million years in the near-14-billion-year age of the Universe.
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Remember, your inability to grasp science is not a valid argument against it.

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Re: Hubble clocks faster cosmic expansion
« Reply #1 on: June 06, 2016, 09:20:15 AM »
We observe analagous phenomena here on Earth: if we arrive at the bus stop a moment too late, we perceive the bus to be accelerating away from us as the distance increases.  Time, which we were mentally measuring in seconds, is now more a matter of half an hour until the next bus.

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Re: Hubble clocks faster cosmic expansion
« Reply #2 on: July 09, 2021, 08:26:18 AM »
An update on measurements of the Hubble Constant using various observations, including of red giant stars.

"'There may not be a conflict after all' in expanding universe debate" | ScienceDaily

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Our universe is expanding, but our two main ways to measure how fast this expansion is happening have resulted in different answers. For the past decade, astrophysicists have been gradually dividing into two camps: one that believes that the difference is significant, and another that thinks it could be due to errors in measurement.

If it turns out that errors are causing the mismatch, that would confirm our basic model of how the universe works. The other possibility presents a thread that, when pulled, would suggest some fundamental missing new physics is needed to stitch it back together. For several years, each new piece of evidence from telescopes has seesawed the argument back and forth, giving rise to what has been called the 'Hubble tension.'

Wendy Freedman, a renowned astronomer and the John and Marion Sullivan University Professor in Astronomy and Astrophysics at the University of Chicago, made some of the original measurements of the expansion rate of the universe that resulted in a higher value of the Hubble constant. But in a new review paper accepted to the Astrophysical Journal, Freedman gives an overview of the most recent observations. Her conclusion: the latest observations are beginning to close the gap.

That is, there may not be a conflict after all, and our standard model of the universe does not need to be significantly modified.

[Continues . . .]

A pre-print version of the paper is open access (accepted for publication in the Astrophysical Journal):

"Measurements of the Hubble Constant: Tensions in Perspective" | arXiv.org
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Tank

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Re: Hubble clocks faster cosmic expansion
« Reply #3 on: July 09, 2021, 10:12:57 AM »
Excellent research.
If religions were TV channels atheism is turning the TV off.
“Religion is a culture of faith; science is a culture of doubt.” ― Richard P. Feynman
'It is said that your life flashes before your eyes just before you die. That is true, it's called Life.' - Terry Pratchett
Remember, your inability to grasp science is not a valid argument against it.

No one

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Re: Hubble clocks faster cosmic expansion
« Reply #4 on: July 09, 2021, 10:25:18 AM »
See, nothing like earthlings. Even the universe wants to get away.

Tank

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Re: Hubble clocks faster cosmic expansion
« Reply #5 on: July 09, 2021, 10:54:12 AM »
See, nothing like earthlings. Even the universe wants to get away.

But that could be said for any planet in the Universe.
If religions were TV channels atheism is turning the TV off.
“Religion is a culture of faith; science is a culture of doubt.” ― Richard P. Feynman
'It is said that your life flashes before your eyes just before you die. That is true, it's called Life.' - Terry Pratchett
Remember, your inability to grasp science is not a valid argument against it.

No one

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Re: Hubble clocks faster cosmic expansion
« Reply #6 on: July 09, 2021, 11:03:48 AM »
Exactly!