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(Forbes)   What could it mean that simulations and observations don't match up when it comes to dark matter?   (forbes.com) divider line
    More: Obvious, Dark matter, story of dark matter, scales of galaxy clusters, irregular galaxies, normal matter, galaxy cluster, new ingredient, Gravitation  
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483 clicks; posted to Fandom » on 23 Sep 2020 at 2:50 AM (3 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



39 Comments     (+0 »)
 
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2020-09-23 2:18:43 AM  
When simulations and observations don't match up 90% of the time it means that suppositions are probably wrong.

The other 10% is reserved for dumbass simulations and observations creators.
 
2020-09-23 2:25:34 AM  
Means we don't even really know how it behaves yet.
 
2020-09-23 2:54:12 AM  
That the three sigmas between what the models predict and what the results are should be an indication for the need of better models, and not a reason for more deferents and epicycles in the current ones.
 
2020-09-23 2:55:18 AM  
Uh, isn't it obvious?

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No? Ok, I got nothing.
 
2020-09-23 2:56:15 AM  
It means we need more data and observations to incorporate into the simulations?
 
2020-09-23 3:02:54 AM  
If you have to ask, then you don't really matter.
 
2020-09-23 3:07:13 AM  
It means that someone will be along shortly to attack TFAuthor for being paid by Forbes to write about science?
 
2020-09-23 3:26:23 AM  
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Dark matter is the player. It removes the ladder from the gravity pools.
 
2020-09-23 3:35:34 AM  
It means your mom walked by the LIGO detector and tripped it.

Every time she does this, a physicist thinks he's discovered Dark Matter.

Sadly, they can't re-create the experiment because they can't find the source of the gravitational waves.
 
2020-09-23 3:40:57 AM  
Dark matter's been sleeping with your mother and honestly isn't sure how to tell you.

/oops
 
2020-09-23 4:33:27 AM  
It means you need to add some kludges to your simulation if you want to keep publishing.
 
2020-09-23 4:42:37 AM  
It means dark matter and MOND are BOTH TRUE.

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2020-09-23 5:06:28 AM  
Considering how abundant dark matter must be in order to have such an effect, the thing that makes sense to me is that dark matter is matter that has a value of 0. Think of a computer hard drive. The medium still exists even when data has not been written to sectors.
 
2020-09-23 5:21:31 AM  
reactiongifs.comView Full Size
 
2020-09-23 5:51:06 AM  
More input, Stefanie?

2 Hours of Johnny 5 Reading
Youtube lv9owSY015w
 
2020-09-23 6:30:24 AM  
It means you get to do the next step in the scientific method.  Refine your theory.
 
2020-09-23 6:34:14 AM  
Huh - the thing we pulled out of our collective scientific ass to explain why the observations weren't lining up with what we thought should happen... Isn't behaving like we thought it should behave and the observations aren't lining up with what we thought should happen. I wonder what the problem is there? Could it be that dark matter isn't well defined and is an oversimplification of forces we still don't understand? Could we possibly have made an incorrect set of suppositions?

If only there were some way to  determine that. Some method.
 
2020-09-23 6:57:11 AM  
Maybe physicists need to lay off the ether.  Huffing and theorizing don't mix.
 
2020-09-23 7:02:41 AM  
very small (sub-galactic)

This is a new definition of very small that I have never encountered before.
 
2020-09-23 7:15:35 AM  

IndyJohn: Maybe physicists need to lay off the ether.  Huffing and theorizing don't mix.


They laid off the aether well over 100 years ago.

https://en.wikipedia.org/wiki/Luminif​e​rous_aether

Though sometimes I'll sign off of a ragchew with "MAY THE AETHER ALWAYS FAVOR YOUR SIGNAL".
 
2020-09-23 7:42:55 AM  

Benevolent Misanthrope: Huh - the thing we pulled out of our collective scientific ass to explain why the observations weren't lining up with what we thought should happen... Isn't behaving like we thought it should behave and the observations aren't lining up with what we thought should happen. I wonder what the problem is there? Could it be that dark matter isn't well defined and is an oversimplification of forces we still don't understand? Could we possibly have made an incorrect set of suppositions?

If only there were some way to  determine that. Some method.


Adjusting theories based on new observation, just like scientists have done for hundreds of years? Shocking.
 
2020-09-23 8:19:03 AM  
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2020-09-23 8:55:30 AM  

Atomic Jonb: It means you get to do the next step in the scientific method.  Refine your theory.


One thing I've never seen a good explanation of: if 999,999 out of a million atoms of matter were destroyed early on, where the heck did all of that energy go?
 
2020-09-23 9:13:16 AM  

natazha: Atomic Jonb: It means you get to do the next step in the scientific method.  Refine your theory.

One thing I've never seen a good explanation of: if 999,999 out of a million atoms of matter were destroyed early on, where the heck did all of that energy go?


Converted to kinetic, with a percentage to irreversible entropic loss?

Note:  Atomic Jonb is not a physicist.  Nor does he play one on TV.  He is an engineer, but by all accounts a pretty mediocre one.  He did do comparatively well* in the Engineering Thermodynamics.  He does think he knows more about it than everyone else though, so regard anything he says, unless it involves piping, as high-viscosity opinion.

* Comparatively well means better than half the class.
 
2020-09-23 9:20:00 AM  
It's kind of tough to simulate something that isn't there.
 
2020-09-23 9:26:45 AM  
It means that Forbes is a sh*thole organization run by the same douchebags that have f*cked this nation up from day one, and I still can't figure out which asshole keeps posting doofus pop-science articles from a financial scam rag like Forbes.
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2020-09-23 9:29:17 AM  

Benevolent Misanthrope: Huh - the thing we pulled out of our collective scientific ass to explain why the observations weren't lining up with what we thought should happen... Isn't behaving like we thought it should behave and the observations aren't lining up with what we thought should happen. I wonder what the problem is there? Could it be that dark matter isn't well defined and is an oversimplification of forces we still don't understand? Could we possibly have made an incorrect set of suppositions?

If only there were some way to  determine that. Some method.


At issue is that what we're observing is Dark Gravity, and the only thing we know creates gravity is matter so the assumption is that it has to be matter. But again. All we're seeing is the gravity. I never liked the term Dark Matter for that reason.
 
2020-09-23 9:36:25 AM  

Stephen_Falken: It means that Forbes is a sh*thole organization run by the same douchebags that have f*cked this nation up from day one, and I still can't figure out which asshole keeps posting doofus pop-science articles from a financial scam rag like Forbes.
[Fark user image 300x128]


Forbes made their original fortune smuggling opium into China.  Their morals have not improved any over the years.
 
2020-09-23 9:38:17 AM  

Sail The Wide Accountancy: the only thing we know creates gravity is matter


Space expands all by itself.  Why can't it contract as well in some places?
 
2020-09-23 9:52:35 AM  
I would have gone with a headline of "Science to the left, uninformed rambling by people who don't understand dark matter to the right".  It is so exhausting engaging with the "dark matter is a made-up fudge factor with no evidence or theoretical motivation, and scientists are bizarrely focused on it for no reason to the exclusion of better theories" people in these threads, of which there is already one archetypical example in this thread.  Maybe I will make an attempt later.
 
2020-09-23 10:32:01 AM  

Benevolent Misanthrope: Some method.


...Developed by some guy... went by the name 'something something bacon'...
 
2020-09-23 11:11:03 AM  

Marcus Aurelius: Sail The Wide Accountancy: the only thing we know creates gravity is matter

Space expands all by itself.  Why can't it contract as well in some places?


Sure. Why not? A lack of Dark Energy somewhere. The point is that we don't really know.
 
2020-09-23 11:41:16 AM  
So, given the choice between the 2500 word mansplaning by ethan or clicking on the links that go to better written articles


We can only conclude that ethan self submits his own garbage to boost his income because he knows that as a 5th rate writer (who clearly failed english multiple times), being reduced to working at forbes because no one else would look at him without laughing themselves to several broken ribs is all he can do in his life

I mean fark, the guy has a phd, you would think taking a week or two to talk to some english professors to improve his writing "skills" wouldnt kill him. But i think it actually would at this point
 
2020-09-23 1:06:35 PM  
It means the simulations are not simulating reality and we need to alter one of them.

We can't change reality so there is the only choice left.
 
2020-09-23 1:17:09 PM  
We can't change reality?

We can't change reality?

/was it over when the Germans bombed Pearl Harbor?
 
2020-09-23 1:57:07 PM  

bughunter: It means that someone will be along shortly to attack TFAuthor for being paid by Forbes to write about science?


Only 6 hours
 
2020-09-23 2:06:49 PM  

LewDux: bughunter: It means that someone will be along shortly to attack TFAuthor for being paid by Forbes to write about science?

Only 6 hours


And another 2 hours later
/do love "I am very liberal, honestly" use of "mansplaining"
 
2020-09-23 2:32:38 PM  

Be polite walk on the right: We can't change reality?

We can't change reality?

/was it over when the Germans bombed Pearl Harbor?


History is not reality
 
2020-09-23 3:15:48 PM  

Marcus Aurelius: Sail The Wide Accountancy: the only thing we know creates gravity is matter

Space expands all by itself.  Why can't it contract as well in some places?


conservation of momentum

FTFA: The picture you should have in your head is like this:
---the large dark matter halo that surrounds the galaxy acts like one giant lens,
---with the individual galaxies inside each having their own halo, acting like smaller lenses embedded in the large one,
---with the dark matter substructure within each galaxy and as part of the cluster itself playing an additional role, creating a large number of small-magnitude lenses as well.


Sounds like epicycles to me, and we all know how THAT turned out.
 
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