Posted on 05/21/2022 4:50:29 PM PDT by BenLurkin
[A]n unseen ‘mirror world’ of particles that interacts with our world only via gravity might be the key to solving a major puzzle in cosmology today – the Hubble constant problem.
The Hubble constant is the current rate of expansion of the universe. Predictions for this rate — from cosmology’s standard model — are significantly slower than the rate found by our most precise local measurements. This discrepancy is one that many cosmologists have been attempting to solve by changing our current cosmological model. The challenge is to do so without ruining the agreement between standard model predictions and many other cosmological phenomena, such as the cosmic microwave background.
Cyr-Racine, Ge, and Knox have discovered a previously unnoticed mathematical property of cosmological models which could, in principle, allow for a faster expansion rate while hardly changing the most precisely tested other predictions of the standard cosmological model. They found that a uniform scaling of the gravitational free-fall rates and photon-electron scattering rate leaves most dimensionless cosmological observables nearly invariant.
This result opens a new approach to reconciling cosmic microwave background and large-scale structure observations with high values of the Hubble constant H0: Find a cosmological model in which the scaling transformation can be realized without violating any measurements of quantities not protected by the symmetry. ... Further model building might bring consistency with the two constraints not yet satisfied: the inferred primordial abundances of deuterium and helium.
If the universe is somehow exploiting this symmetry researchers are led to an extremely interesting conclusion: that there exists a mirror universe very similar to ours but invisible to us except through gravitational impact on our world. Such “mirror world” dark sector would allow for an effective scaling of the gravitational free-fall rates while respecting the precisely measured mean photon density today.
(Excerpt) Read more at scitechdaily.com ...
“If the universe is somehow exploiting this symmetry” A very smart universe....
Hubble Constant? What does Chelsea’s father have to do with this?
“They found that a uniform scaling of the gravitational free-fall rates and photon-electron scattering rate leaves most dimensionless cosmological observables nearly invariant.”
I knew that was the reason!
Didn't look it up. Memorized in 7th grade.
Fudge factor. These theoreticians would be destroyed if they were cross examined in court and were liable for damages if their theory was wrong.
Behold
the new
Common Core Cosmology.
That’s what I thought a while ago.
He was constantly at the...you know, the thing.
That’s how Chelsea was conceived.
Sheryl Crow - Beware Of Darkness ft. Brandi Carlile
https://www.youtube.com/watch?v=E-0B4jm3kD8
My sister studied cosmology in high school. She still can’t cut hair worth a tinkers damn.
Not a bad movie.
If it’s unseen it can’t be ghostly. Ghosts manifest in some perceivable way.
Great film.
OK, i know it’s English, because i recognize the words
i just don’t understand what they mean...
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