Darn universe.

Gravitational lens gives us a third estimate of the Universe’s expansion
^{— John Timmer · Ars Technica · May 12, 2023}

With such grand scales, uncertainties should be expected, though.
It's not like measuring the front door for replacement.

https://www.space.com/universe-expansion-could-be-a-mirage :eyes: :yikes:

Welp, gotta see more professionals try and make sense out of this. Getting rid of dark matter and dark energy would be helpful.

If the universe is indeed eternal, then the question of our existence is less puzzling, given that in an infinite amount of time, almost anything can happen, and here we are.

It will be interesting to see how they fix these Six Galaxies that appear to be older than the Big Bang allows them to be, in terms of time for formation.

"Because although some analyses indicate that these six galaxies aren’t as massive as first thought, others suggest that they might be even bigger. This indicates that, depending on follow-up observations, we may yet have to remake cosmology – most likely by throwing new cosmic ingredients into the mix to explain the apparent paradox.

“It basically means you’re seeing galaxies before they have time to assemble,” says Charles Steinhardt, an astrophysicist at the Cosmic Dawn Centre in Denmark. “If this is really true, this does mean the standard model of cosmology is broken.”

https://www.newscientist.com/article/mg25834433-200-what-the-huge-young-galaxies-seen-by-jwst-tell-us-about-the-universe/

It's paywalled, unless you have a way around it.

It will be interesting to see how they fix these Six Galaxies that appear to be older than the Big Bang allows them to be, in terms of time for formation. — Manuel

I haven't come across any evidence or learned consensus that the "Six Galaxies" are, in fact, what they appear to be. It seems more likely than not to me that they are images distorted by gravitational lensing or another spacetime phenomenon yet to be discovered in physical cosmology. 'Dark matter' and 'dark energy', respectively, seem to be much more substantiated predictions than this preliminary interpretation of 'anomalous' JWST images. :chin:

Predictions? I mean, so far as I know they (dark matter, dark energy) are postulates made in order to render serviceable the 5% of the universe we can make predictions of.

These six galaxies might end up having a solution and thus be rendered consistent with what we currently have, but there's beginning to be sufficient data that indicates that we are going to need to change our cosmology quite a bit. How drastic this will be is an open question.

Maybe we need to adjust the age of the universe a bit, or we discover that galaxies can be formed significantly easier than what we first thought. Or what you posted could turn out to be right, that would be most exciting.

Interesting times...

I have read that Penrose is saying these anomalies might support his 'CCC' cosmology, which is the idea that the Universe goes through an endless cycle of expansion and contraction (suggestive of Hindu cosmology). He details the theory in one of his books although I find Penrose's books to mathematically abstruse to understand.

Ahhh, that was Penrose's idea. If I remember correctly, there are a few others that believe in similar things.

I think you would very much enjoy Cosmosapiens by John Hands, he goes over these theories, and a few different ones, other than the Big Bang Model and much, much more. Though not pop-sci, it's not too bad to read at all.

It's quite exciting to see the JWST shake up our model of Cosmology. We still need more and better analysis, but, something needs modification. Took longer than I expected, honestly.

All in all, very cool. :up:

Looks a cool book. Some of those Big History types talk about those kinds of topics (Brian Swimme comes to mind. Oh, and I thought you said 'someone needs medication' but then I read it again. :joke:

Ayyye. We idealists, probably. :halo:

Recently observed 'time-dilation in the early universe' might account for JWST's anomalous "six galaxies" ...

https://www.theguardian.com/science/2023/jul/03/astronomers-observe-time-dilation-in-early-universe

That's interesting, will have to wait and see how this pans out, but this is a promising avenue.

Agreed.

What is the purpose of the Euclid space telescope?

https://www.space.com/gravitational-waves-astronomers-why-so-excited?utm_content=space.com&utm_campaign=socialflow&utm_medium=social&utm_source=facebook.com&fbclid=IwAR3b-iXwDkNyPYphpvQ9RdV0Dl7_IxVaT1Nhgzv2VQnVDVQbeNJQgX-WnjI

Completely off topic. It's not a telescope.

↪Manuel Recently observed 'time-dilation in the early universe' might account for JWST's anomalous "six galaxies" ... — 180 Proof

But would this effect have the opposite result? The anomalous galaxies appear much older than they should be?

Maybe this angle will catch on?

Reinventing cosmology: uOttawa research puts age of universe at 26.7 — not 13.7 — billion years (at ScienceDaily)
^{— Bernard Rizk · University of Ottawa · Jul 11, 2023}

DOI 10.1093/mnras/stad2032

Webb Telescope spots Mysterious Question Mark in Space



Is it or isn't it? That's the question!