A_A

Also, a lot of ashes falling everywhere makes everything look grey.

Humanity is so stupid when it comes to "territory" and we are not the only species that acts like beasts about it.

I found these :
https://www.pinterest.com/pin/363102788709576636/
...
Amazon.com: Bellzi Triceratops Cute Stuffed Animal Plush Toy - Adorable ... pinterest.com
...
https://www.thedinopark.com/store/p1089/Seri_the_Triceratops_Plush_-_Bellzi.html
... Triceratops - Bellzi Seri Plush
thedinopark.com

using image search : blue triceratops plush

No physical mechanisms predefines future events (or is there one ?).

So, I could state that the future does not exist yet and the past as ceased to exist.

in that statement I have a problem with the definition of existence. Does the definition of existence exist itself ? This is (is it ?) more a problem of terminology than philosophy or physics.

Anthropologically speaking this is the best answer. Our brain needs a certain span of time to establish perceived reality.

I do believe there is a strong link to be understood between what is observed in this post and what was posted :
X-Ray echo suggests our galaxy was "active" (quasar-like) just 200 years ago - Nature
by @CanadaPlus one month ago.
Thanks for this (X-Ray echo) post and for the last comment you made here in the other thread, about Penroses' current work.

So I will read through some of this and try to come back with something worthwhile to say.

Update : I read some more and most of that is just out of my reach. The only paragraph I kind of understand somewhat is this :

(...) conformal cyclic cosmology (CCC) theory.[67] In this theory, Penrose postulates that at the end of the universe all matter is eventually contained within black holes which subsequently evaporate via Hawking radiation. At this point, everything contained within the universe consists of photons which "experience" neither time nor space. There is essentially no difference between an infinitely large universe consisting only of photons and an infinitely small universe consisting only of photons. Therefore, a singularity for a Big Bang and an infinitely expanded universe are equivalent. [68]

...and now I need some rest.

I believe in this community you have to write the word "rule" in the title, like so :
Banana? Banana rules !
(you can edit the title even after posting, that is, if you want so)

Thanks 😊. This comes from a discussion at !askscience@lemmy.world

... from this discussion thread

I read through these and try to understand them but mostly I don't like those theories, because (in part) more and more there are disparities between them and observations.

So I came up with some ideas myself, one of which I wrote in here :
"New physical cosmological model : is it coherent ?"

But it may take a few years or a few thousand before we have a good cosmology.

Thanks for explaining in simple words things that are out of my reach.

I couldn't understand the first equation in that article (which has 148 equations) : Hamiltonian formulation of gravity as a spontaneously-broken gauge theory of the Lorentz group by Tom Zlosnik.

I read through the blog post you linked from Dr. Pavel Kroupa, The Dark Matter Crisis which is more easy to understand. From that blog I get that an explanation of the cosmos without the Big Bang is far from the main focus now.

Before writing to you, I was already convinced MOND is superior to LCDM and this for the same reasons you give in your comments and some more.

I hope in the next decades we will see consistent cosmology theories not only without dark matter but also without a big bang.

P.S. : You might like this :
A non-Standard model, David Merritt, Aeon Magazine, July 2021

Cosmological Microwave Background

The original Big Bang also violates conservation of energy.
For the moment this is just a shower thought. More work would have to be done along these lines.

There is already a link in my post for one big source of gravitational waves

Could MOND (or RMOND) allow the description of the cosmos without any big bang ?
I do not work in this field but I read quite a bit and I'm interested.

Cosmic microwave background (CMB) is very smooth ; if there was black holes in there I guess we would see (huge) unevenness.

Hummm, or at least, that stupid LCDM would lead to such an expectation. ... that model also put CMB at :
400 000 to 500 000 years after the BBang.
and most distant visible galaxies (and black holes) at :
330 000 000 years after BB.

if we go by this number we have a few hundred million years to produce such big things out of something very smooth.

if we used a different model we could have much more time.

The title of that paper is :
"Supermassive Primordial Black Holes From Inflation"
I have read about inflation since many years and it is viewed increasingly as impossible and falsified.
I don't work in this field. For me this is just a hobby. Are you a physicist ?

Under this very article you provided you can read, at criticism :
At a conference in 2015, Penrose said :

"inflation isn't falsifiable, it's falsified. ... BICEP did a wonderful service by bringing all the Inflation-ists out of their shell, and giving them a black eye." (...) Penrose's shocking conclusion, though, was that obtaining a flat universe without inflation is much more likely than with inflation – "by a factor of 10 to the googol power!"

Please read about this guy :

Roger Penrose (...) mathematician, mathematical physicist, philosopher of science and Nobel Laureate in Physics.

I read much more than the average person about it and my experience & education allows me to know how scientific research works. The fact is, not only inflation but Lambda CDM is dead.

There is a lot more to say about it.

I think what's also great with Penrose is that he doesn't care about money or politics, which are major factors guiding what other physicists will say.
He already proved himself and doesn't need to argue about pity things. He can even allow himself to make some jokes about 10^(10^100) or talk seriously about it... I wouldn't know.
Finally, if I add the immense chance of talking to him this wouldn't be my preferred topic.

I like what you say. So, in a few minutes I will make a new root comment inside this post so you could continue this thread some more with me.

Those mostly create magnetic and electomagnetic radiation. Some are also magnetars

I often think about this in the shower

P.S. : Also, i just read the rules and I believe I follow them

Those black holes allow the Penrose process which is somewhat similar to what I am talking about here.

Wrong expectations from wrong model.
I wonder if RMOND (TeVeS) would be better here than LCDM. Research money is mismanaged.

This comes from this discussion thread