@i-137.bsky.social
Reposted
Reposted
It’s important to map out our universe! But dynamical dark energy remains wildly implausible. It’s a fanciful notion, requires fine tuning worse than a pencil on its tip, and yet more tuning for the sole purpose of hiding itself from observers for so long. I call it a unicorn in a duck suit here:
Is Dark Energy Getting Weaker? New Evidence Strengthens the Case. | Quanta Magazine
Last year, an enormous map of the cosmos hinted that the engine driving cosmic expansion might be sputtering. Now physicists are back with an even bigger map, and a stronger conclusion.
www.quantamagazine.org
March 19, 2025 at 11:34 PM
It’s important to map out our universe! But dynamical dark energy remains wildly implausible. It’s a fanciful notion, requires fine tuning worse than a pencil on its tip, and yet more tuning for the sole purpose of hiding itself from observers for so long. I call it a unicorn in a duck suit here:
Reposted
“The overwhelming claim has been that dark energy is no longer consistent with a cosmological constant […] However, this conclusion — despite how widely reported it’s been — is completely premature”
Is dark energy weakening? DESI's results are ambiguous
DESI, by mapping galaxies, has claimed they see evidence for dark energy evolving by getting weaker. But that's only one interpretation.
bigthink.com
March 29, 2025 at 12:01 PM
“The overwhelming claim has been that dark energy is no longer consistent with a cosmological constant […] However, this conclusion — despite how widely reported it’s been — is completely premature”
Reposted
Raphael says what a lot of theorists are thinking -- dynamical dark energy (as opposed to a constant vacuum energy density) seems unnatural and raises new problems. But as theorists repeatedly learn, the data have the last word; we will adapt to how the universe turns out to be.
It’s important to map out our universe! But dynamical dark energy remains wildly implausible. It’s a fanciful notion, requires fine tuning worse than a pencil on its tip, and yet more tuning for the sole purpose of hiding itself from observers for so long. I call it a unicorn in a duck suit here:
Is Dark Energy Getting Weaker? New Evidence Strengthens the Case. | Quanta Magazine
Last year, an enormous map of the cosmos hinted that the engine driving cosmic expansion might be sputtering. Now physicists are back with an even bigger map, and a stronger conclusion.
www.quantamagazine.org
March 20, 2025 at 3:56 PM
Raphael says what a lot of theorists are thinking -- dynamical dark energy (as opposed to a constant vacuum energy density) seems unnatural and raises new problems. But as theorists repeatedly learn, the data have the last word; we will adapt to how the universe turns out to be.
Reposted
Hey folks, check out our brand new survey and video on the attitudes of physicists to most controversial topics on black holes and fundamental physics. You will be shocked at what’s consensus, and what’s not!
What do physicists think about controversial topics, like interpretations of QM, fine-tuning, dark matter, dark energy, inflation, and quantum gravity? Join
@nafshordi.bsky.social and me as we reveal the results of a brand new survey of leading experts. www.youtube.com/watch?v=e7Rq...
@nafshordi.bsky.social and me as we reveal the results of a brand new survey of leading experts. www.youtube.com/watch?v=e7Rq...
Copenhagen survey on Fundamental Physics & Black Holes
YouTube video by Phil Halper (aka Skydivephil)
www.youtube.com
March 21, 2025 at 9:49 PM
Hey folks, check out our brand new survey and video on the attitudes of physicists to most controversial topics on black holes and fundamental physics. You will be shocked at what’s consensus, and what’s not!