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So the anomelies he points out in the dipoles is a blantant error. How can that be when this is supported by a number of scientists and tests as I linked. You don't seem to be able to seperate the facts and the messager.Cool, but that just makes you wrong too.
Not unsupported claims so much as blatant errors. Even if he wasn't a crank his credibility as a science communicator would have been completely busted before he even got to discussing the paper on anisotropy. Anyone with a modest understanding of cosmology (for example someone who'd just taken a freshman survey course) would have stopped watching after a few of those major errors. (@sjastro detailed them for you, so I will not go over them for you again.
As a "scientist" he has no credibility to attack. He writes crank physics articles for a crank journal, which I wouldn't have known unless you linked them. So, thanks?
Well actually its the very large structures that are contradicting the cosmological principle. The distance at which the cosmological principle should be a good approximation to the real distribution of matter was calculated from the concordance model in a 2010 paper by Hunt and Sarkar. They found that the deviation from the uniform distribution fall below one part in a hundred from an averaging distance of about 200 to 300 Mpc on. (300 Megaparsec is around 1 billion light years).The Earth is not in the middle and it is not a measurement problem. The Universe is expanding and expanding everywhere. Even with anisotropy in the density and expansion rate, more distant galaxies would *still* be more redshifted at larger distances in every direction and from every place in the Universe.
No it doesn't. Not about how the expansion works, and also not about how these new results and analyses work. (Well at least the ones from actual cosmologists.) If the Earth is in a local underdensity or there is a massive structure "nearby" altering expansion a small bit locally does not change the overall properties of expansion, but it might change some of the parameters derived somewhat. This is particularly a problem if the observations are only made in a limited set of directions (such as only in the part of the Northern sky not obscured by the Milky Way.). I would gladly discuss those things with you, but you have latched on to persons promoting fantasy physics and until you give up the guy with his own (laughable) alternative to standard particle physics there isn't any real hope of a reasoned conversation.
Even if that paper is correct and the dark energy effect is just a consequence of local anisotropy in the expansion the cosmological principle would still apply just at a larger scale (which we are already seeing evidence of just from the detection of large structures) and the "expanding away from every observer" thing would also still apply.
The distance to the next closest galaxy andromeda is about 2 and a half million light years. But from that distance on the cosmological principle should be fullfilled to a good degree of accuracy and look pretty much the same if the concordance model is correct ie there should be no clumps more than about a billion light years.
But scientists keep finding these large clumps like the Clowes-Campusano- Quasar which is around 9.5 billion light years away and 2 billion light years in size. Or the hugh quasar group spanning a massive 4 billion light years and the 'Great Arc' that spans 3 billion light years across. Theorectically these structures should not exist. The Giant Arc has a probability of less than 1/100,100 to come about by chance and that doesn't factor in all the other big structures.
It looks like we live in a part of the universe that has significantly less density in what is called the Local Hole which means the local value of the Hubble rate needs to be corrected down. This may help as the measurement of the local Hubble rate has been in conflict with the value of the early universe and one of the biggest conflicts for many years.
But as Sabine said this is a pretty mild tension of around 3 sigma. The paper she refers to by Sarkar who did a consistency check on the cosmological principle measuring nearby quasars and the CMB dipoles and found a conflict of 4.9 sigma. Thats a 1 in a million chance of being a coincident. This along with the other anomelies caused Sabine to believe that we would see a paradigm shift in the standard model.
Yes she probably would. But though Sabine is not the source she is relaying what the source said based on the tests done. So its real science and not some individual idea.First, Sabine Hossenfelder is not the source for those ideas or results. Here she is just a science communicator. Her area is black holes and quantum gravity. Flemming, on the other hand, does claim to have his own models for these things and (if she knew about him) Sabine would rip him apart.
Sarkar was just one of several scientists in the paper though he has headed the theorectical physics group at Oxford for many years which includes astrophysics and cosmology. That is usually how it works that different scientsist have different expertise relating to the issue.So am I.
Sarkar (who is the last author on the paper) is, as far as I can tell, a particle physicist with only a passing contact with cosmology all related to this anisotropy analysis.
For example Jacques Colin is head of astrophysics at Niels Bohr Institute and Roya Mohayaee who works in theoretical cosmology and large-scale astrophysics, working, in particular, on the understanding of dark matter and large-scale anisotropies in the universe. So between them they cover the topic.
Yes we will have to wait and see. But I suspect rather than solve the problems it will only get worse because its not just about the cosmological principle but a number of issues with the standard model, the omission of gravity being a major one that despite decades of investigation cannot be resolved as well as dark matter which makes up the majority of the universe.An adjustment related to changing the scale of cosmological principle (smooth mass distribution)? That's all I'm seeing now and while it does make the metric equations for the evolving Universe a bit messier, the consequences to the general facts don't seem that large.
One of the (150) citations to the paper from Colin et al. (Sarkar) that is this one that considers the kind of things I was thinking of as the next step -- actually extending the Lambda CDM model from the isotropic and uniform expansion of the FLRW spacetime to one with a simple asymmetry.
Testing spatial curvature and anisotropic expansion on top of the ΛCDM model
Not only does this expanded model (with the breaking of the isotropy condition) *not* eliminate the "Dark energy" in the form of a cosmological constant, but it doesn't even remove the so-called "Hubble tension".
6 major cracks have appeared in the standard model of cosmology. Is it wrong?

6 major cracks have appeared in the standard model of cosmology. Is it wrong?
The standard model of cosmology tells the story of the evolution of the Universe. But contradictions suggest the story isn't quite right.

No I am not a cosmologists and thats why I rely on those who are.Is your expertise as great in the rest of cosmology as well?
Ok but we should alos not lose the anomelies as they may indicate that something major is wrong. If anything I think the many adjustments and add ons over the years to explain away the anomelies is what is causing scientists to get lost among the trees thus losing sight of the forest.Don't get lost chasing anomalies.
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