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'Cosmic radio' detector could discover dark matter within 15 years

phys.org

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Re: 'Cosmic radio' detector could discover dark matter within 15 years

#31
post #28

I’ve always felt like (as neither a mathematician nor a physicist) that “dark matter” is simply just something that suddenly makes a math problem work to model the universe-—and that in reality, that math problem just doesn’t work. Is my theory even _possible_ here, or am I missing something. Really fundamental?

99% of the evidence points to dark matter being a real thing. And yes, many many phds have thought of the "what if we're just completely wrong" aspect. It's not interesting

Re: 'Cosmic radio' detector could discover dark matter within 15 years

#32
post #14

Earlier quoted context omitted.

We do have a pretty substansive evidence that dark matter exists: from the cosmic background radiation, gravitational lensing, galaxy formation simulations, galaxy rotation curves, etc. Why is it so hard for people to believe that there are some particles that are not interacting with electromagnetism that we haven't detected directly yet? It's not even a precedent, the neutrino is just like that. I guess the name "d…

Not trying to be a mindless skeptic but your “why is it so hard” question seems bizarre to me. It seems quite understandable that it’s hard for people to believe there’s a particle responsible for a significant percentage of all matter in the universe that we have no direct evidence of and the only reason it’s believed to exist at all is because a lot of otherwise well-understood equations and observations require it…

If people understood that the last 200 years of science has shown that we are still utterly ignorant about the underpinnings of the universe, they might accept it better.

But we are not very well educated so yeah, they will doubt it for no good reason other than "it doesn't feel right"

Re: 'Cosmic radio' detector could discover dark matter within 15 years

#33
post #30
post #28

I’ve always felt like (as neither a mathematician nor a physicist) that “dark matter” is simply just something that suddenly makes a math problem work to model the universe-—and that in reality, that math problem just doesn’t work. Is my theory even _possible_ here, or am I missing something. Really fundamental?

Dark matter is a proposition put forward to explain observations. It’s not a result of pretty math, it’s the result of a lot of different observations which don’t align with the current math unless you stick something like dark matter into it.

So yes. It is a missing term that balances our models of physics against observations. The implications of that term and hypothesis as to its physical reality are what we are trying to figure out right?

Re: 'Cosmic radio' detector could discover dark matter within 15 years

#34
post #28

I’ve always felt like (as neither a mathematician nor a physicist) that “dark matter” is simply just something that suddenly makes a math problem work to model the universe-—and that in reality, that math problem just doesn’t work. Is my theory even _possible_ here, or am I missing something. Really fundamental?

I posted this literally yesterday:

https://news.ycombinator.com/item?id=43726217

Re: 'Cosmic radio' detector could discover dark matter within 15 years

#35

how long would it go without finding dark matter before physicists would get worried?

There are already a growing number of astrophysicists who don't buy into dark matter/energy.

How is that number measured if I may ask?

Re: 'Cosmic radio' detector could discover dark matter within 15 years

#36
post #22

Earlier quoted context omitted.

I agree with you. "Dark Matter" (and "Dark Energy") are colorful (colorless?) names that I think helped these theories diffuse into the popular consciousness at a time when popular interest in science was at a high-water mark (remember when "chaos theory" was fashionable?). As I mentioned in another comment recently (it feels like a "Dark Matter" or "Dark Energy" headline trends on HN almost every day), this coded th…

Had we named it "invisible matter", perhaps not as much controversy would surround it.

The controversy exists only in laypeople cirlces to be honest. Consesus among actual scientists is pretty firm.

Re: 'Cosmic radio' detector could discover dark matter within 15 years

#37

Am I wrong to assume that science that is harder to prove will have less impact on human wellbeing? Electricity is easy to run experiments on and prove, meaning humans can manipulate it for our benefits easy. However, the Higgs Boson was extremely difficult to prove and I see no way that it could ever benefit humanity's wellbeing. Now how could humans improve our wellbeing by manipulating dark matter?

This is a weird thought, but maybe it depends on how far you allow yourself to imagine, and what "acceptable imagining" is? I can imagine a few things that Higgs may end up being useful for, sure, they're "insane" or "wild" or "100% not how things could work you're nuts" - but I can still see ways it could benefit humanity if I was right about my imagination, and I'm not going to bother stopping my imagination.

Re: 'Cosmic radio' detector could discover dark matter within 15 years

#38
From https://news.ycombinator.com/item?id=42376759 :

> FWIU this Superfluid Quantum Gravity rejects dark matter and/or negative mass in favor of supervaucuous supervacuum, but I don't think it attempts to predict other phases and interactions like Dark fluid theory?

From https://news.ycombinator.com/item?id=42371946 :

> Dark fluid: https://en.wikipedia.org/wiki/Dark_fluid :

>> Dark fluid goes beyond dark matter and dark energy in that it predicts a continuous range of attractive and repulsive qualities under various matter density cases. Indeed, special cases of various other gravitational theories are reproduced by dark fluid, e.g. inflation, quintessence, k-essence, f(R), Generalized Einstein-Aether f(K), MOND, TeVeS, BSTV, etc. Dark fluid theory also suggests new models, such as a certain f(K+R) model that suggests interesting corrections to MOND that depend on redshift and density

Re: 'Cosmic radio' detector could discover dark matter within 15 years

#39

A headline using the word "could" implies "but probably won't". Report on things when they happen. Don't speculate.

Well, what's actually happening is, some people have proposed an experimental apparatus that is actually buildable. That's something that might be worth reporting.
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