New research suggests that our universe has no dark matter
New research suggests that our universe has no dark matter
The current theoretical model for the composition of the universe is that it's made of normal matter, dark energy and dark matter. A new University of Ottawa study challenges this.
This model combines two ideas—about how the forces of nature decrease over cosmic time and about light losing energy when it travels a long distance. It's been tested and has been shown to match up with several observations, such as about how galaxies are spread out and how light from the early universe has evolved.
These hypotheses never seem to stand up to rigorous analysis. Still, always welcome the discussion.
77Absolutely. On the one hand, having ~26% of the known universe consisting of a substance that we cannot detect directly leaves a lot of questions open. On the other hand; dark matter is postulated because otherwise things like galaxy rotation curves don't match what we believe they should be from general relativity, and this theory doesn't seem to address that.
https://en.wikipedia.org/wiki/Bullet_Cluster#Significance_to_dark_matter
Also, light 'losing energy' would be a violation of the first law of thermodynamics, unless it loses it 'to' somewhere.
24At some point we may have to review some theories though. The idea that light would lose energy over extra long distances at least makes sense unlike some kind of latter that we can't detect and we can't figure out why it would either still be there but not more than it is.
This is kind of how time was supposed to be absolute. Einstein never received a Nobel for the theory of relativity because of how suspicious it seemed at the time.
1
This is the same researcher that said the universe is 26.7 billion years old based on the JWST data instead of 13.8.
Happy to see ideas thrown out there to help us understand what dark matter is, but I'm really looking forward to all the random videos that eventually come out explaining why it holds up against a whole bunch of observational evidence while it ignores all the other observational evidence it doesn't hold up against.
22
It's time for people to start taking this matter lightly.
59Well played.
7
"In standard cosmology, the accelerated expansion of the universe is said to be caused by dark energy but is in fact due to the weakening forces of nature as it expands, not due to dark energy."
Fascinating! I'm looking forward to seeing where this goes. The "tired light" theory they mention doesn't seem to have held up to scrutiny, but maybe there's something else about weakening over time or distance that we haven't observed yet.
49How would the gravitational forces weakening accelerate the expansion speed? It would at best "not slow it down", you can't explain the speed increase with this logic. That just sounds wrong. Am I missing something?
3
sory i eated it all
36I guess it's my turn to point out typo like a good grammar police. Eat is ate in past tense. Also you only have one r in sorry.
Anyway, now I shall head to another corner of internet to make my own typos so people can point them out
0these typos were intentional
good luck on your typo making endeavors tho!1
Just going to assume this popular science article is about a theory with no support as usual.
29um i browsed it for nearly two minutes and at the very top of the page there was clearly a chart. i didn't understand it but obviously we can conclude that it is based on scientific science
25I have also seen the picture and can confirm, that it is, in fact, a picture.
7
*hypothesis. A theory (in the scientific sense) has to be tested and therefore has at least some support!
16Fair.
5
Always has been.
8
Don't get too excited, this is a pretty fringe theory that doesn't really have experimental evidence. They were able to make some observations fit with their theory without dark matter yes, but not all of them. The tired light part in particular has a lot of contradictions with observation that they don't explain.
So interesting, but far from definitive.
25Couldn't the same be said for the proof of dark matter?
They were able to make some observations fit with their theory with dark matter yes, but not all of them
6Couldn’t the same be said for the proof of dark matter?
No, dark matter is actually a great explanation for lots and lots of observations; the only problem with it is that we don't know anything about it other than that it is such a good explanation for these observations.
9Generally for a new theory to be accepted, it needs to explain everything that the old theory did plus something more
9
I'm a workshop kind of guy that enjoys space documentaries. For my part, I see "dark matter" as a known hole in our current understanding of cosmology, and I bet when we figure out how it does actually work it'll lead to some really cool TV shows.
3These type of comments always throw me through a loop.
Scientist:
Makes hypothesis, does analysis, writes paper, and presents work for other academics to review.
Lemmy poster:
Logs into lemmy. Posts "i think not mr scientist". Recieves upvotes.
While I would certainly like to say I understood any of this. This post has not met any rigorous standard of debunking the researchers findings.
It's fine if you have knowledge on this particular subject but it kinda seems like you're just throwing shade.
-4While I would certainly like to say I understood any of this. This post has not met any rigorous standard of debunking the researchers findings.
Thats not what the posting claimed to be. You missunderstand. Either intentionally or just as a fact.
1
This stuff is way, way over my head. And probably most of humanity right now. In this moment I can feel some envy and admiration towards whoever is around to understand the great breakthroughs we may one day have on this matter.
22Coles notes: scientists made calculations on the universe and it didn't make sense because the math says there should be more mass and energy than what they know exists. So they called the missing mass dark matter and the missing energy, dark energy.
Now some guy in Ottawa figured out better math that doesn't need the "dark" stuff to make the math make sense.
20My understanding of dark energy is a little different. As I understand it, we figured gravity pulls things together, right? So everything should be kinda slowly falling back together from the big bang. It was theorized to end in a 'big crunch' where the universe collapses back and then explodes again in a cycle.
Only when they tried to measure how fast distant objects were moving relative to us, they found that things were still moving away from each other. More than that, the farther away things were, the faster they were moving. Meaning distant objects were accelerating.
Acceleration requires energy, but we don't know the mechanism behind this, or where the energy comes from. Hence, dark energy.
9Just to be clear, there are lots and lots of different observations that are all explained by dark matter; it's not just a single term in "the math". Furthermore, the hypothesis presented in this article is not "better math" because it does not do as good a job as dark matter in explaining all of these observations.
5
Only white matter is allowed in this universe.
19All Matter Lives.
11Black matter lives
6White matter matters!
Thin white line!!!
2
I went and read the research.
I'm not an expert and as such can't really analyze it fully. But what I took away is that it aimed to test a part of new theory by with a very narrow measurement, using early-universe density oscillations. They left dark matter out of the equation with the new model, and it was a smashing success if you're willing to overlook that it requires the universe to be a completely different age than it is.. In short, this is shenanigans.
edit: I'm fine being wrong if I am, I'd love to know more from informed readers. That's just what I took away https://iopscience.iop.org/article/10.3847/1538-4357/ad1bc6#apjad1bc6s3
edit2: It also presumes the "tired light theory" is true. Tired light is the flat earth of astrophysics/cosmology. Yeah, there are contrarian knuckleheads in every discipline.
12Tired light is the flat earth of astrophysics/cosmology.
Does it really say it? Can you please quote the piece?
1
Is anyone really surprised? Really neat study though!
3A neat study... which you know literally nothing about? How can you possibly know it's neat?
1I'm just built different
0
Dark mind over dark matter, amirite?
3seems like a good spot for the dark matter rap https://www.astronomy.ohio-state.edu/weinberg.21/Rap/darkmatterrap.mp3
2Dicks out for dark matter!
0No shit?
-7Shit is not considered dark matter, no.
6Never taken Pepto, have you?
1
It's almost like we shouldn't have been all in on the thing that literally has less evidence behind it than fucking psychic powers.
-10It's not that dark matter was the only theory, there are also different theories based on modified newtonian dynamics (MOND), these aren't any better than dark matter though, maybe even worse theories.
3Wasn't the FBI or CIA responsible for making a psychic project? Project Stargate or something?
3The Men Who Stare At Goats
3
They say, while being fully behind a hypothesis with no supporting evidence and while not understanding the research.
1
The Tremendous Space Kablooie fails again.
-16