This model has been in testing for 3 years and it passed all tests so far.
It already past sevral test and it solves a lot of problems that require dark energy or matter. And problems introduced by the James Webb telescope. It also confirmed cosmic chronometer findings on the expansion history.
It does not disprove models, it just shows that dark matter and energy are not needed and explains why we can’t find them.


I thought dark matter was pretty much confirmed because of the universe’s expansion acceleration though ?
No, it’s still basically a placeholder. Dark matter is basically mass we can’t detect in any way, but the invisible extra mass is required to make our models match up with reality
I think that expansion is more related to dark energy, which is a different placeholder
But we really don’t understand the mechanisms for expansion in the first place… If the universe is twice as old that will certainly change the model. There’s also a growing theory that the universe exists within a black hole, and the spin of that black hole might explain several different strange properties of the universe
Dark energy “explains” why the universe expands more than we expect, and dark matter “explains” why some parts of the universe stick together more than we expect. Eventually we’ll get a better understanding of how gravity/space/time works and won’t need these bolt-ons anymore
There has been some good evidence lately that the universe is not expanding and that originally this theory was built on some faulty information.
This could mean no dark matter and perhaps no big bang.
No more red shift?
I am no astronomer so please take this with a grain of salt. It is my understanding that we made what could be some incorrect assumptions based on our position observing the universe. This is not definitive yet, but it looks like our current accepted views, like the universe expanding everywhere at equal speeds, may be wrong.
https://arxiv.org/abs/2606.09650
So a moment akin to realizing the sun does not revolve around the earth?
Yeah, it is hard to judge things from only our one perspective so we can fall into traps.
That and gravitational lensing.