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(Big Think)   Remember the first JWST deep field image? It isn't merely galaxies clustered together, but starlight from between the galaxies exists, too, and it traces out the dark matter inside   (bigthink.com) divider line
    More: Cool, Galaxy, Dark matter, Gravitation, presence of dark matter, Galaxy clusters, Universe, dark matter, Large-scale structure of the cosmos  
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1196 clicks; posted to STEM » on 05 Dec 2022 at 11:28 AM (7 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



26 Comments     (+0 »)
View Voting Results: Smartest and Funniest
 
2022-12-05 11:01:04 AM  
One day we will learn that all Dark Matter is just other socks the dryer steals, detritus that fell into couch cushions, between car and consoles, and small parts that disappear when dropped on a garage floor, all never to be seen again.
 
2022-12-05 11:01:55 AM  
car seats and consoles.

That's what I get for Farking before my second mug of coffee kicks in!
 
2022-12-05 11:14:29 AM  

markie_farkie: One day we will learn that all Dark Matter is just other socks the dryer steals, detritus that fell into couch cushions, between car and consoles, and small parts that disappear when dropped on a garage floor, all never to be seen again.



Wrote a paper once that suggested much the same thing. Presented at conference. The physicists at the conference were NOT amused.
I had to explain to them that it was gentle humor mocking some trends in phenomenology and allied stuff and suchas. And the stupid paper actually got printed in a peer-reviewed journal... a journal dedicated to Hegelian studies (which the paper had abso-farking-lutely nothing at all to do with).


-- my eyes rolled back so far I could see out my ears --
 
2022-12-05 11:36:17 AM  

markie_farkie: One day we will learn that all Dark Matter is just other socks the dryer steals, detritus that fell into couch cushions, between car and consoles, and small parts that disappear when dropped on a garage floor, all never to be seen again.


According to Douglas Adams (and I have no reason to doubt him), it's the stuff the detecting instruments were packed in.
 
2022-12-05 11:47:47 AM  
Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pull of the stars in the galactic clusters, black holes, other galaxies that do this.
 
2022-12-05 11:51:34 AM  

markie_farkie: One day we will learn that all Dark Matter is just other socks the dryer steals, detritus that fell into couch cushions, between car and consoles, and small parts that disappear when dropped on a garage floor, all never to be seen again.


Dark Matter is the extra piece that comes with each Lego set.
 
2022-12-05 12:03:12 PM  

Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pull of the stars in the galactic clusters, black holes, other galaxies that do this.


They've always been saying gravitational lensing comes from dark matter. It's one of the main ways we know about it.
 
2022-12-05 12:09:11 PM  

Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pull

warping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.
 
2022-12-05 12:15:39 PM  
Fark user imageView Full Size



So the space amoeba is real
 
2022-12-05 12:19:40 PM  

studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.


Fark user imageView Full Size
 
2022-12-05 12:21:37 PM  

PirateKing: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pull of the stars in the galactic clusters, black holes, other galaxies that do this.

They've always been saying gravitational lensing comes from dark matter. It's one of the main ways we know about it.


Right, dark matter is only known from and expected to have gravitational effects.

Mass is the only known cause of gravity, which warps space time. Logically dark matter has mass, which is what gives it interaction with gravity, this impacts spacetime, hence gravitational lensing being impacted by dark matter.

If it interacted with gravity and didn't impact gravitational lensing (the bending of light around gravity centers), we'd have a very different expectation of what it is. And it'd be much weirder.
 
2022-12-05 12:22:37 PM  

studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.


Technically mass causes gravity. But nothing/everything is "affected" by gravity, it's all just flowing in curved paths.
 
2022-12-05 12:37:36 PM  

studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.


So explain gravitational lensing then. THE LIGHT IS BENT. FROM GRAVITY.
 
2022-12-05 1:00:47 PM  

Mikey1969: studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.

So explain gravitational lensing then. THE LIGHT IS BENT. FROM GRAVITY.


Alternative theory :  light goes straight but space is warped from dark matter making it appear as if the light is bending.
 
2022-12-05 1:12:48 PM  

Mikey1969: So explain gravitational lensing then. THE LIGHT IS BENT. FROM GRAVITY.


General Relativity basically describes how "gravity" is the bending of space-time. You're both right. But the layman's understanding of "gravity" - which usually boils down to "things with mass attract each other" - kind of breaks down when talking about massless particles/waves like photons. The more complete description of "bending space-time" still holds up, though, so it's a better framework to use if you can wrap your head around it.

/see what I did there?
//am also a layman
///with a friend who worked on LIGO
 
2022-12-05 1:19:12 PM  

mcreadyblue: Mikey1969: studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.

So explain gravitational lensing then. THE LIGHT IS BENT. FROM GRAVITY.

Alternative theory :  light goes straight but space is warped from dark matter making it appear as if the light is bending.


So, light's being refracted by dark matter, then.  Like when you look into a pool.
 
2022-12-05 1:32:52 PM  
I love all the stuff we're getting out of the JWST, but one critical question has yet to be raised. Can it run Crysis?
 
2022-12-05 2:29:13 PM  

xanadian: mcreadyblue: Mikey1969: studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.

So explain gravitational lensing then. THE LIGHT IS BENT. FROM GRAVITY.

Alternative theory :  light goes straight but space is warped from dark matter making it appear as if the light is bending.

So, light's being refracted by dark matter, then.  Like when you look into a pool.


Refraction is caused by a change in speed between the two mediums.
 
2022-12-05 2:57:35 PM  

mcreadyblue: Mikey1969: studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.

So explain gravitational lensing then. THE LIGHT IS BENT. FROM GRAVITY.

Alternative theory :  light goes straight but space is warped from dark matter making it appear as if the light is bending.


"it is not the light that bends, only yourself"

/spoon!
 
2022-12-05 3:18:59 PM  

Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pull of the stars in the galactic clusters, black holes, other galaxies that do this.


Gravitational lensing comes from mass.

There's more mass than is visibly accountable for by quite a lot more than margins of error could account for.

Thus we know something more massive than every 80's kid's fat, promiscuous mother lurks unseen.  Dark matter.
 
2022-12-05 3:32:03 PM  

studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.


You pulled that "fact" out of whose ass?
 
2022-12-05 3:47:01 PM  

wage0048: You pulled that "fact" out of whose ass?


https://letmegooglethat.com/?q=mass+of+a+photon

Plenty of discussion of the science around the concept that photons have no resting mass (acknowledging that it's weird to even talk about the idea of "resting mass" for a photon).

Today's XKCD relevant: https://xkcd.com/2707/
 
2022-12-05 4:19:03 PM  

Diagonal: markie_farkie: One day we will learn that all Dark Matter is just other socks the dryer steals, detritus that fell into couch cushions, between car and consoles, and small parts that disappear when dropped on a garage floor, all never to be seen again.


Wrote a paper once that suggested much the same thing. Presented at conference. The physicists at the conference were NOT amused.
I had to explain to them that it was gentle humor mocking some trends in phenomenology and allied stuff and suchas. And the stupid paper actually got printed in a peer-reviewed journal... a journal dedicated to Hegelian studies (which the paper had abso-farking-lutely nothing at all to do with).


-- my eyes rolled back so far I could see out my ears --


frinkiac.comView Full Size
 
2022-12-05 7:02:26 PM  

wage0048: studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.

You pulled that "fact" out of whose ass?


My first year college physics professor.
 
2022-12-05 7:05:26 PM  

buravirgil: studebaker hoch: Mikey1969: Wait, now they're saying that gravitational lensing comes from dark matter?

No, it's from the gravitational pullwarping of space due to the mass of the stars in the galactic clusters, black holes, other galaxies that do this.

Photons have no mass and are unaffected by gravity.

[Fark user image 850x444]


This guy gets it.
 
2022-12-06 7:41:08 AM  

wage0048: markie_farkie: One day we will learn that all Dark Matter is just other socks the dryer steals, detritus that fell into couch cushions, between car and consoles, and small parts that disappear when dropped on a garage floor, all never to be seen again.

Dark Matter is the extra piece that comes with each Lego set.


Dozens came with my Yoda set.
 
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