Dark Matter is as Boring as it is Fascinating

One of the main reasons we still don't know what Dark Matter is, is it simply doesn't possess the properties to be useful in our world. (That we know of)
Which makes its extremely difficult to detect.
Even if we do discover it, that still won't change it's irrelevance to the physical world.
Although the particle itself may be boring and inert, why it exists and where it comes from is as fascinating as any other concept.
Videos Explaining How We Know it Exists:
CrashCourse - • Dark Matter: Crash Cou...
PBS SpaceTime - • No Dark Matter = Proof...
Seeker - • How Close Are We to Fi...
Extra Learning:
The bulk of the information came from this online course. I highly recommend it to curious minds.
From the Big Bang to Dark Energy - www.coursera.org/learn/big-bang
Why Doesn't Dark Matter Form Black Holes? - www.forbes.com/sites/startswi...
The 'Strong CP Problem' Is The Most Underrated Puzzle In All Of Physics - www.forbes.com/sites/startswi...
If Dark Matter Is Everywhere, Why Haven't We Detected It In Our Solar System? - www.forbes.com/sites/startswi...
Kinda like the music?
Checkout more at: dopeminemusic.bandcamp.com/

[@Stevethe11th]

I like the idea of calling dark matter a wimp as to bully it enough to come out of hiding to defend its honor.

[@DoctressCalibrator]

Dark matter is not sentient and it doesn't care how you call it.

[@SuperStriker7US]

@@DoctressCalibrator Source?

[@sphakamisozondi]

@@DoctressCalibrator yeah, captain buzz kill over here.

[@inutamer365]

@@DoctressCalibrator how can it not care if its not sentient. Checkmate atheists

[@Luaporleafcutterant]

@@SuperStriker7US well it's in the video. It doesn't interact with anything, so it can't hear what you're saying to it either

[@phalamy9180]

The core of this is "Everything acts as we expect until it chooses not to"

[@brandonhughes4076]

This is pretty much the motto of quantum physics. “Electrons are particles, except when they act like waves, but when we’re watching they always act like particles. Except when they act like waves.”

[@muhammedaadil267]

This channel is so underrated

[@dragonballz9235]

And you know what. He doesn't monetize any of his videos. So he doesn't make any money

[@leonderksen2423]

Nah

[@Friddle]

It really is

[@muhammedaadil267]

@@jnavafb @Javier N. I've been watching his videos for well over a year now. I remember subscribing when he had around 5k subs and thinking to myself, "wow! this channel is going to blow up" and sure enough now it's at 84k. Couldn't be more happy for him! Now I just need to see the face behind channel 😁

[@enzoruberto]

Do you put this on every one of his videos? I feel like every time I watch one I see this comment

[@goldenhydreigon4727]

"Dark Matter is a wimp." Kirby fans: Impossible.

[@moosesues8887]

Fr

[@Frytoons]

I’m looking for Kirby fans in the comment section

[@lazyraccoon6204]

@@Frytoons same here

[@RealDarkMatterDR]

It's kinda true

[@hexbug101]

@@Frytoons that’s the only reason I clicked on the video

[@kyoto9916]

It's so mind-blowing to realize that there is matter all around us that makes up 95% of the total mass of the universe while not ever interacting with itself and others i mean there is literally nothing you can compare this to in a metaphorical way

[@Jeremy.Bearemy]

95% of my brain does not interact with anything, or itself. Because I iz dum.

[@Neon-ws8er]

if it exists

[@LeifMaelstrom]

I feel like there's an introvert joke here.

[@cubedude8690]

me

[@crustaceanking3293]

hermits

[@TBJ1118]

Holy shit I just found out yesterday about this channel and I'm mesmerized. You explain with a clarity and transmit curiosity better than any other channel I've watched, PBS spacetime and Star Talk included. Great job, keep it up please!

[@oatlord]

I love the PBS show, but I find his cadence or volume or something really difficult to follow. The previous host wasn't as difficult I thought.

[@houserhouse]

@@oatlord PBS Spacetime is for waaaaay too smart people. I cant follow that stuff, but this guy is insane at conceptualizing.

[@oatlord]

@@houserhouse Check out the channel But Why? He explains things so well I finally understood some stuff

[@houserhouse]

@@oatlord this is literally that channel

[@jdlwiquwudhakiqu7181yd]

My name

[@brianbethea3069]

0:48 Every time you show this particular image of the milky way I always try to adjust my eyes like crazy to get it to focus, haha.

[@Jeremy.Bearemy]

Dude there's 3 of everything. Look close

[@Roach_Dogg_JR]

Can u adjust ur pupils like camera apertures?

[@jamzee_]

@@Roach_Dogg_JR Yes :)

[@yyyyyk]

But how would we know that the particle that hit the Xenon atom in the detector is dark matter, and not just another neutrino?

[@minerscale]

perhaps neutrinos leave some signature which is different to that of dark matter e.g. the energy that the xenon glows at.

[@robbie8142]

Yes

[@gregoryfrechou]

when a neutrino strikes Xenon, it imparts a VERY specific amount of energy to it and that has to be shed via a photon. those photons only exist at specific frequencies, so its a finger print. A wimp, if they exist and interact the same way, would have a whole bunch more energy in it do to its massive size and high kinetic energy, is should make a VERY bright signal if not be so energetic as to cause the photon to create subatomic particles that would then decay and give off a big field of photons. we can detect all those photons and add up the energy from them all to figure out what the original particles' properties were. we do that with cosmic rays hitting the atmosphere.

[@yyyyyk]

@@gregoryfrechou Thank you, that is a very comprehensive and clear explanation. I do wonder why WIMPs should have a high mass. They might have a mass lower even than that of a neutrino, as far as we know, right?

[@Mernom]

@@yyyyyk IF they did, they'd be easier to detect by the laws of statistics.

[@ianbryant]

The end of the video, asking "maybe the universe is a simulation with finely tuned parameters"--I would say this comes down to the classic theory of infinity; The only universe in which we could wake up and make the observation, "hey these physical constants seem perfectly tuned" is the one with "perfectly tuned" physical constants. Given infinite different universes, it's no miracle that we woke up and made the observation, "hey these physical constants seem perfectly tuned".

[@alexp8785]

Something about a watch or some shit

[@_P2M_]

It's called the anthropic principle.

[@joshwingate1717]

I'm somewhat of a believer in the anthropic principal. However, in stating that, it is hypocritical of us when we say to religious people that there is no creator of the universe because both of those theory's take a lot of faith since both of them are impossible to test.

[@_P2M_]

@@joshwingate1717 The anthropic principle isn't a theory. It's a principle, hence the name. Also, it's not an alternative to creationism. The anthropic principle is an argument for saying creationism isn't necessarily the answer. It says we only exist because we are able to exist. There'd be no human observer in a reality where we couldn't exist. Therefore, the reality we experience is the one where we're able to exist. It may seem suited for us, not because it was made for us, but because we were able to exist within it, otherwise we wouldn't even be here in the first place to experience it.

[@Maric18]

also remind me of the quantum mass suicide computer :D for problems which are hard to compute, but easy to check, lets say sorting a list. you first shuffle the list in a truly random order and then you collapse the superposition by iterating through it and checking if it is sorted. If it is not sorted, you then destroy everything. If it is sorted, you print out "success" you will only ever observe success :)

[@ihato8535]

This is the best video that explains dark matter.

[@ocoolwow]

lol no not even close

[@ihato8535]

@@ocoolwow Name a better one.

[@TheKorenji]

@@ihato8535 Kirby Lore

[@Palladiumavoid]

@@ihato8535 some people just want to see the world burn

[@Mrkiki0209]

Gotta love the axion, such a good police force, keeping the strong force in its place 😊

[@FZRP_]

😂

[@sossololpipi9633]

perhaps axions are not all pigs after all

[@lorefox201]

axions are like guardian angels

[@MinoriGaming]

It truly is an experience watching kirby videos and then getting this recommended because the algorithm sees "dark matter" and runs with it.

[@nosignal2240]

I've been on a Kirby lore crazy as of recently. I don't think this is the dark matter you were trying to recommend me KZbin... But it was entertaining nonetheless

[@dragonicbladex7574]

he's giving you the secret to defeat dark matter

[@thecoltster1]

One day we'll run the clock back to find the Minecraft seed to our universe and create ourselves in a paradox on some quantum machine.

[@johnjordan3552]

it isn't paradox, it's recursion

[@davestewart5224]

Your videos are seriously among the best on KZbin. You have a knack for taking difficult concepts and explaining them so even a child can understand it. I love your channel

[@davidmurphy563]

That was simply amazing. Breathtaking and informative. Thank you.

[@raziyatheseeker]

I swear, the models you use remind me of an old textbook for kids about space from the late 90s. The visuals really help ease grasping these concepts. I love them!

[@sophiaisstillagoodunit6626]

When you get recommended a video about dark matter and it isn't about a pink ball fighting a bloody eyeball

[@sup3a]

As rarely as we detect dark matter, I become a fan of a channel. This is one of those moments. Hope you'll get a wider audience!

[@lizardy2867]

Here's a couple observations and questions to go alongside them: Gravity is commonly known as an acceleration towards a body of matter. We know already that space time stretches and shrinks depending on the amount of matter (or more generally, energy) contained within it, and in turn, affects time (which to an outside observer also affects speed). This begs the question, how would it work the other way around? Would inducing a stretch in space time (such as the expansion of the universe) across a large enough space be able to affect the gravity an object experiences relative to the un-stretched space (that which is closer to the center of gravity)? This is not to say that it would directly increase the effect of gravity, instead it would be as though the matter were moved closer to the center in time rather than space. Like increasing the rate at which you experience gravity, rather than increasing gravity itself.

[@sunRay04]

In theories like the big rip, where space keeps on stretching faster, it would make sence that objects would still output the same amount of gravity. Considering that dark energy is not gravity, i think the answer to your question would be a no.

[@lizardy2867]

@@sunRay04 Nice point. In that case, rather than directly influencing gravity, it would be an emergent property of the expansion? Like someone on a boat losing grip of their anchor due to the waves (although the expansion does not involve normal forces, probably).

[@user-li8nm8nz9b]

Imagine a day were a scientist comes out and says "yes we found dark matter and our findings point to it being a wimp"

[@RealDarkMatterDR]

You've just explained my life

[@amirnobar2003]

I can reassure you that one day some scientists will say: It wasn't a wimp! It is Simp😂😂🗿

[@CocoaRon]

So what I'm getting from this is that dark matter is the packing peanuts of the package (universe) while normal matter is the thing you ordered. The peanuts affect the ordered item, but they are basically junk that doesn't do anything else or have any other value. Or maybe I'm just confused, which is most likely the case.

[@Slowlythinking]

The discovery of you channel happens to be one of the best things to occur me during this year. Thanks for your effort.

[@kalpeshchaware4491]

I really appreciate you put related video links and more!

[@deeman2200]

Thank you very much. I really appreciate your videos, clarity. Please keep making them.

[@mubarakvodel5763]

I rarely ever comment, but this channel is so well put together. Everything that constitutes this channel makes it my favorite channel to watch. Thank you for expanding my understanding of the universe. Keep up the great work!

[@devin8656]

Great video. Well explained as always.

[@thatnonchalantguy]

this whole video feels like a personal attack. "doesn't want to interact with anything, not even itself" 🥲 "is cold, inert, and passive"😨 "is a wimp"😭

[@a-red_digit6644]

Bruh I fucking relate to Dark matter

[@RealDarkMatterDR]

You've just explained my life

[@NarendraSingh-sl8wy]

Great video. Looking forward for next one.

[@L0dG]

Subscribed! Great channel. Great explanations! : )

[@farges76]

Man I hate being reminded that I'm just a friggin load of wiggles in the universe. Great vid tho!

[@MarshedWS]

Can't believe a singular person managed to debunk Kirby lore

[@gersongabriel3984]

Amazing! Waiting for the next videos

[@smileyp4535]

I love your channel so much I'm so glad you made it

[@robbabcock_]

Great look at dark matter. I hope that we figure it out in my lifetime.

[@oatlord]

"Truly a wanderer with no ambition. " Ah yes, a particle after my own heart.

[@AtomicWaffle]

You made me fall in love with physics all over again! Cant put into words how grateful I am!

[@bliss5297]

For a moment, I read “Dark Matter” as “Dank Matter”, and so I thought this entire video was a meme video, memeing about dark matter being a wimp

[@saturnmedia1]

I have no idea why this only has 16k views, I see a lot of work put in this video. I hope you get even bigger, man!

[@tbraghavendran]

How much bigger?

[@saturnmedia1]

@@tbraghavendran This is such a weird question that feels almost sexual. Do you have an inflation kink or something?

[@syedhussain7077]

The axion scene where you went "Hey! Don't do that!" was hilarious. Had to rewatch that part and sub after that.

[@qu0dlb3t]

Seriously what is this ... I really really like these vids. Excellent work, glad I found this channel.

[@ChrisContin]

Nice graphics! Fascinating talk.

[@Rayya69420]

“Dark matter is boring” Kirby lore:”Am i a joke to you?”

[@keerthivasanr8562]

I love this channel ❤️❤️❤️

[@ButWhySci]

I appreciate the support.

[@space_mans]

this makes me wonder though. if all "things" in the universe are excitations in a field, what makes them persist through time? what force/energy/weirdness is responsible for constancy through time?

[@mariogiunta1989]

Time is simply the fourth dimension. We can't really grasp it entirely but it's a constant in and of itself.

[@drdca8263]

Is this a meaningful question? Why should there need to be a “thing” that makes physics act the way it does? I guess you could say that there must be some “first cause” for all the “why does it work that way?”, but then, well, it seems like the only answers to that which could possibly be satisfying, would be either a philosophical answer (like Tegmark’s mathematical universe idea) or theological (e.g. “God continually makes the world be/act the way it is/does”), rather than a “physical” explanation.

[@mariogiunta1989]

@@drdca8263 you're totally right, "why" is the wrong question for physics

[@dIancaster]

@@drdca8263 With an answer like that, it sure was a meaningful question.

[@drdca8263]

@@dIancaster if by “meaningful question” you mean “provokes meaningful responses”, then, I guess, but I wouldn’t say my response was really an *answer* to the question as they asked it. They asked for something like an “energy or force”, an explanation based on a physical phenomenon/thing. My response was that no explanation of that form can be a satisfactory explanation for why physics continues to be how it is, and so there can’t be an answer that satisfies the question as asked. I suppose they did list “weirdness” as an alternative to “force” or “energy”, but I still got the impression that they meant for this “weirdness” to be a physical thing, not something metaphysical or theological.

[@ericwijaya2119]

"What is Dark Matter?" Kirby villain

[@unclerandy398]

Binging this channel its so good

[@MJ-em_jay]

The universe is coded in Python with Jupypter notebooks, sweet!

[@WackoMcGoose]

I mean, if you can give machines a soul with Python, why couldn't it simulate the universe?

[@Emerald-Fluffie]

The thumbnail wouldn’t load and I thought this was about the Kirby boss… I am disappointed now

[@Tyrkia123]

I have never witnessed a science youtuber that explains things as well as you! I have watched COUNTLESS videos, and none of them ever came close to being as clear as this! Thanks!

[@xmegaaaaa3729]

I have got a bunch of Kirby videos in my recommendations, indeed. But while fewer videos were mentioning Kirby bosses, while the others don't even mention Dark Matter, and some which I purposely remove from my recommendations for possible spoilers, I'm not surprised to get But Why?'s video in my recommendations as well. Though I never refuse to learn more about our universe, it's always fascinating!

[@CloveHitchJack]

Imo, darkmatter seems more like a bonus effect or harmonic of another force. whos to say that light doesn't have different properties at the galactic scale? I've been thinking of galaxies as clouds that are centered around the force of gravity but are held together by electromagnetic fields like how poking a lump of plasma affects the structure of its entire mass

[@lherfel]

Awesome video : )

[@Michael-yq4nz]

This is just particles before the entropy patch

[@nero1612]

Nice video!

[@RoshDroz]

I love your videos. One note though, shouldn't your intro animation have each word of "But Why?" stacked vertically so that the shirt and arms don't have to be stretched so far apart. Just a thought. OK now I need to rewind your video because there's no way I can keep up now after missing whatever you said while I typed this.

[@jc740]

Amazing! But in 9:40 and 10:17 isn't electromagnetism stronger than the weak force?

[@kayzeaza]

It just drives me crazy thinking about how much we don’t know. Every time we answer a question, we have more questions

[@rahmaankhan6234]

Genuinely curious, is there any reason why at the end of the video when discussing the probability of anything existing at all, the possibility of a “creator” wasn’t mentioned? @But Why?

[@LeTtRrZ]

Another line of speculation is that there is no dark matter, and the disparity of predicted mass to actual mass of galaxies can be explained by an increase in aggregate gravity from certain effects such as each star’s angular momentum.

[@zoda6991]

dark matter is a mood 3:14 P.S. love the visuals

[@katinkax5535]

Besides the content, your voice is so calming. I like listening to it when I find it hard to fall asleep. Theses current times can be tough when your normal “routine” is gone.. I hope you understand what I try to say 🙈

[@edwardlewis1963]

The start of the video was clear enough; There appears to be an anomaly better the estimates of 'speeds' based on the Doppler measurements. Does the calculation take into account the distribution of the mass in the galaxy? If the model models the motion of the outer objects by using center of mass of the galaxy to model a 2 body simplification, then that could account for the discrepancy. Does the calculation take into account electric charge? I never hear any mention of charge when it comes to astronomical motion. There is a discontinuity in the video around the 3 minute mark where you jumped to 'dark matter particle'. Where did that come from? Isn't that just speculation?

[@tylerherr4288]

my blender sense is tingling you can tell when youve used blender too much when you recognize the procedural textures from it

[@hornball8711]

Name of the music in the end ?? Pls

[@TerryE-UK]

I took a Cambridge Math graduate level degree 45 yrs ago. I got intrigued by these concepts when bedridden with long term illness some 15 years ago, and I whiled away some of this my time by deriving the simple orbital mechanics implied by the galaxy rotational profiles. This is quite easy to derive that using basic Newtonian gravity mechanics, and this leads to the conclusion that only a small % of the mass must be subject to the normal mechanisms for energy shedding (electromagnetic and strong forces) and thus decay/collapse into the dominantly 2D visible disc structure found in non-elliptic galaxies; you need 90+% of mass to be DM large immune to such collapse mechanisms. What is rarely discuss is that you still get angular momentum coupling between the visible and dark matter because of gravitational sling shot coupling as the DM orbits cross the visible galactic plane, and this flattens the otherwise spherical distribution of the DM. For the same reason it is nearly impossible for DM to orbitally decay into black holes.

[@overalltommy5376]

How would these proposed options of dark matter interact with the gravity of a black hole?

[@Vindictator1972]

Thanks to this Video, I can safely say I have forgotten more about dark matter than a lot of people know.

[@azazel7317]

That Dark Matter camo in BO3 tho 😍

[@mekore]

idk why this channel havent blown up yet

[@randomcharacter6501]

I think DM and DE are just some intrinsic property of space/time that we have yet to discover.

[@Seethenhagen]

What if the expansion of space also has a rotation component?

[@Arc125]

No mention of MOND? (Modified Newtonion Dynamics, aka gravity acts differently at different scales)

[@ianbryant]

I feel like scientists might be jumping the gun on dark matter. Like with the example of the speeds of stars in a galaxy "indicating dark matter", I would say it comes down to occam's razor. It's far more likely that our methods of observing galaxies are just flawed in some way, or that our expected condition of those galaxies is actually inaccurate under the "scientifically agreed-upon rules" of normal matter. Dark matter just seems like a manmade concept to perfectly plug the holes in our physical model of the universe.

[@david203]

This video only considers the galaxy rotation observation, not all the other evidence. But a simpler and testable theory might be a modification of gravity that allows all the stars to attract each other more than the center of gravity of the galaxy. Then the outer stars would be pulled along more than the ones nearer the center. The advantage would be that no new particles have to be found, especially particles that cannot be found due to the difficulty of detecting them. The disadvantage is that some way of proving the adjustment to gravity would have to be found. Just my opinion!

[@bzztbzztboy]

You might be interested in the idea of MOND, then! en.wikipedia.org/wiki/Modified_Newtonian_dynamics

[@david203]

@@bzztbzztboy Yes, this (as well as some research described by Dr. Sabine Hossenfelder) was exactly what I had in mind, thanks.

[@Zahn-rad]

Ok, that last part about Dark Matter being a patch genuinely scares me, and not a lot of psychological things do that. The Simulation theory is something that's been done to death that I'm not concerned whether it's real or not. From my perspective it doesn't matter. But Dark Matter as a "patch" is utterly terrifying, because now it presumes the Simulation isn't hands off. Those running the simulation can and have tinkered with the simulation as they need to, or as they see fit.

[@timdillon4876]

Funny how quick we go to simulations and not think for a second that the divine or god could exist, dark matter among many other unexplainable anomalies could be potentially something mind blowing, we have yet to discover so many mysteries of science, and the universe could be dying of heat death and resetting over and over again with a big bang event and in that amount of time maybe terrestrial beings ascended to a higher dimension of living or consciousness or perhaps a entity like god has always existed and is much more complex and friendly to science then close minded religious institutions believe.

[@jongyon7192p]

@@timdillon4876 yeah i also hate the science denialists. religion doesnt have to be about ignorance but here we are

[@RealDarkMatterDR]

Don't worry im not going to hurt you

[@Acsion42]

There's a new theory going around that information actually has it's own mass- and that what we observe as dark matter is just the mass of all the information in the universe.

[@Bill-Cipher]

“Scientifically accurate Dark Matter from Kirby”

[@KrispyRodent]

I thought that this was a Kirby lore video with a wierd thumbnail…

[@leothefox3134]

tfw you tought this was about kirby but its about the actual, irl dark matter:

[@steveminecraft5887]

Kirby lore has been getting pretty complex huh?

[@saturnmedia1]

Holy shit. I shouldn’t be watching these physics videos while tipsy, way too much awesome info.

[@jasonchung898]

I honestly thought we were talking about Kirby

[@TaylorFalk21]

ive met mostly 2 types of people in this world. Incredibly smart people that arent good at simplyifing or explaining things. Or people that do a good job of explaining, but lack that deep knowledge to cover topics that are reasonably tough. You sir, seem to have both qualities

[@tbraghavendran]

Then he is the 3rd type.

[@lilorangefella]

no way the villain from Kirby is real

[@autodidacticartisan]

I like the idea that were in a simulation and dart matter is just a balance patch. "Yo dude can you buff gravity for the next balance patch" "Yeah sure thing, God"

[@qpabani]

Thank you.. really.

[@IWasAlwaysNeverAnywhere]

yeah sure falling in is great but what happens if i have a high velocity before entering the black hole?

[@SpanishArmadaProd]

um even light gets sucked in and there's nothing faster than that

[@IWasAlwaysNeverAnywhere]

@@SpanishArmadaProd light has no mass tho so its boring. If anything it probably just scatters unrelentlessly

[@sunRay04]

@@IWasAlwaysNeverAnywhere what? Why would you propose that?

[@IWasAlwaysNeverAnywhere]

@@sunRay04 no reason xD just thinking things. No intentionsssssssss none xD but ye

[@nightfire777]

2:27 wait, what ? a photon is an electrically charged particle ???

[@makelgrax]

Not exactly; a photon has an energetic value but it's not the same as the positive/negative charge protons and electrons have. On further thought I'm not exactly sure why it appears coupled with protons and electrons, unless it is referring to particles which interact with electromagnetic forces, and even then it's a bit weird because afaik photons only interact with electrons.

[@drdca8263]

@@makelgrax photons don’t have charge. They are electrically neutral.

[@drdca8263]

Photons mediate electromagnetic interactions. This doesn’t mean they have a non-zero electric charge, and indeed they don’t.

[@makelgrax]

@@drdca8263 Ah my bad, I got confused between the energy they carry and the particle property of charge, had to re-read some definitions I misunderstood (somehow I read they were parallel to each other). Also, the last part of your second comment is a bit oddly worded, I highly recommend avoiding double negations because they can be quite confusing.

[@mineduck3050]

Dark matter is a placeholder name for a theory's dead end. A way to keep funding and validation alive, telling us they need it to solve the 'crisis' in cosmology the theory creates. The other term for crisis in this instance is DEAD END.

[@metamirby7074]

"Dark Matter is a wimp." Kirby fans: Are you sure about that?

[@MaddieDoesRandomStuff]

You forgot to add it is weak to crystals and can possess penguins.

[@saber8941]

Because this video I theorize a DMR (dark matter reactor) would be hard to generate power, a artificial gravitational field could get it to speed but finding a way to combust it would be hard.

[@brokenlegs8431]

Dunning and Kruger would like to have a word with you

[@oibruv3889]

@@brokenlegs8431 a reply more intelligent than the original post by 10^a if a=number if neutrinos that pass through my head in a whole hour

[@spooklass3588]

Gonna be honest, I thought this was about Kirby

[@LuisAldamiz]

What about black holes? They fit all the requirements of DM and the late Hawking defended them as still perfectly possible option.

[@ryancraigt]

You are mostly correct in this regard but at this point it has almost been entirely ruled out. In a sort of synopses we would require relatively small black holes for there to be a smooth effect (very little noticed locally), yet large enough that they would not decay from hawking radiation. The result is a limited mass range that has been systematically shown to not work.

[@LuisAldamiz]

@@ryancraigt - Isn't that what we expect of primeval black holes? BHs the size of sports balls (all sizes) and the mass of several earths, like possibly is the case of Planet Nine... Hawking radiation is only conjectural (no objective evidence supports it, Hawking had to literally hack his way into building such theories because there's no unified theory yet, he took a primarily quantum-mechanical approach, it may be all kinds of wrong). In any case, even if Hawking radiation is real, that would only be a parameter for adjustment, also some say that the end result is not full evaporation but "naked singularities", which would act as gravitational particles and be virtually impossible to detect and could thus still be part of dark matter, even maybe most of it. So... not black holes but the next level of black-holeness.

[@LuisAldamiz]

@@ryancraigt - PS: notice also that the detections of "impossible mass" black hole mergers are off limits, what seems to imply that many many more small mass black holes than expected actually do exist, else they should not be able to reach those "impossible" masses... unless they are primeval BHs, in which case there are also many more than expected.

[@ryancraigt]

@@LuisAldamiz As far as I'm aware Hawking radiation is a non negotiable in physics. Thus black holes as we know it would not work. If there was naked singularities then that would quite likely be dark matter and would also have radical implications in the field

[@jeremiahmullikin]

I think "dark matter" isn't matter, but instead the invariant mass associated with the system of two photons traveling in different directions. The mass would be in frame where total momentum is zero. One photon is massless but two is massive if they're not going the same direction.

[@WZRD210]

I'm hooked

[@jtgd]

6:58 “this is fine”

[@MaksB.]

Nice

[@idromano]

10:17 Hell yeah Python - Jupyter!

[@dmtc6913]

c-137 did you catch any of that