Reacting to The Largest Black Hole in the Universe - Size Comparison

[@AVeryTallHobbit]

"The Universe has no obligation to make sense to you" - one of my favorite quotes

[@tutifru-titi9954]

-We're just not sure, thats why we make science. (i may have messed it up a bit...)

[@Che9009]

*Black Science Man?

[@sarastysamuel]

I love this quote

[@geprekbento7543]

🅂🄲🄸🄴🄽🄲🄴 🄽🄸🄶🄶🄰

[@void_cozmo5424]

WHAT IS THAT MELODY

[@mxlexrd]

What makes black holes special is how small they are. They pack an enormous quantity of mass into a relatively small size. The strength of gravity depends on the amount of mass and how far you are from the centre of mass, the fact that black holes are so small means you can get very close to the centre of mass, meaning their gravity can be super strong.

[@decomposedcorpse5186]

The singularities themselves are infinitely small

[@mxlexrd]

@@decomposedcorpse5186 According to General Relativity the there is an infinitely small singularity, but most physicists suspect that General Relativity isn't correct and there will be some finite size.

[@Jzombi301]

@@mxlexrd like the Plank length?

[@xenotypos]

"into a relatively small size." It feels like you're describing neutron stars more than black holes, since as mentioned by someone above black holes actually (probably) don't have a size. Or an incredibly (not relatively) small one. But I guess I'm just being annoying for the sake of it, since if we get close to a neutron star we'd instantly be vaporized and destroyed in every way possible before having the chance to actually die from that fancy super strong gravity.

[@mxlexrd]

@@xenotypos In the video they considered the size of the black hole to be the size of the event horizon, so that's what I went with.

[@TarotLadyLissa]

"Gotta respect the hustle!" is not a phrase I thought I'd hear in reference to a space video! lol

[@MichaelScheele]

Wormholes are theoretically possible, but whether they would be survivable to traverse or not is another issue.

[@tophers3756]

Of course a wormhole is different than a black hole.

[@reaperzwei845]

@@tophers3756 But, there could be a wormhole at the center of every black hole....

[@markhamstra1083]

@@reaperzwei845 No, that is a common misconception for which there is really no theoretical basis.

[@reaperzwei845]

@@markhamstra1083 Really? The way I've heard it described sometimes is that if black holes spin they wouldn't have a singularity they would have a ring and that inside that ring could be a wormhole but we don't know obviously.

[@markhamstra1083]

@@reaperzwei845 That kind of Kerr singularity is the result of some very specific simplifications and a purely classical model. That those simplified conditions would actually hold in reality and that quantum effects would not make a purely classical description incorrect at the scale of a singularity are both generally considered to be extremely unlikely. And that doesn’t even begin to consider all of the other physical problems associated with a traversable wormhole connecting regions of spacetime over distances significantly greater than the Planck scale. It’s an interesting idea that can motivate more interesting physics, but it just isn’t at all likely to actually work that way in reality.

[@savmiller8327]

Technically speaking, black holes don't have a "size." They have a density so high that if you travelled inside one, space would become a linear dimension and time would become three dimensional (time and space switch essentially). This makes absolutely no intuitive sense, but very little about black holes makes intuitive sense. The diameter of a black hole as we observe it is actually the diameter of its event horizon. The event horizon is the point of no return where even light is too slow to resist the pull of gravity-hence it forms a sphere of absolute darkness.

[@cottoncatt1186]

I always had a problem with a massless particule being directly affected by gravity. The bending and the breaking of space-time as we know it is they key, as you pointed out with the switch between space and time. The speed of causality, the fastest speed a cause can affect its surrundings with a consequence and an information can travel at, is the speed limit. Light only manage to reach this speed due to its massless particules (no mass, no impediment to movement). It is not suprising that where the event horizon lies, the speed required to orbit the black hole is the speed of causality. Beyond this frontier, space-time as we know it breaks and so the causality in a "normal" space time too. Beyond the frontier, as you said, consequences can only travel in space in one and only one spacial direction, no matter the speed or the acceleration : to the singularity. Any event (cause) that happend beyond the frontier will never have consequences that can reach the outside. And from the outside point of view, an observer will only see a black nothingness, a black zone where no event happens (because consequences and informations will never reach him). The frontier is called the event horizon because it is the limit (the horizon) where any cause (event) is still able to affect the outside, the limit where beyond it no event exist from an outside point of view.

[@ChocciAdam]

@@cottoncatt1186 The event horizon is not where light orbits, it’s the location at which light most point directly away to escape. What you are thinking of is called the innermost stable circular orbit or ISCO, and for a non-rotating black hole that’s 3x the radius of the event horizon. When you cross the event horizon space-time does not “break”. In fact if you fell into a black hole you wouldn’t notice anything special happen when you cross the event horizon. It’s often described that the spatial dimensions become “time like” but this is only true in the sense that all spatial dimensions point to and terminate at the cosmic horizon, which is normally the infinite time horizon but is now the singularity inside a black hole.

[@TheModeler99]

does that mean you can travel back in time in black hole?

[@arishemthejudge6780]

@@TheModeler99No, we are 3 dimensional beings so we cannot control our movement into any other dimension. Just like how a 2D character on a piece of paper would involuntarily fall to the ground a direction perpendicular to its plane, if suspended. Beyond the Event Horizon, like the OP said, space turns into a linear dimension. That means there is only one way you can go, toward the singularity. You can also think that reaching the singularity is your future now

[@cpMetis]

Finding black holes is like playing Sudoku. We have a bunch of stuff we CAN see around it, doing weird stuff. That's like the numbers you get to start the Sudoku puzzle. Black holes are like the "solution" to the Sudoku puzzle, where we figure out how everything can fit together to make it work. You see a line with 1-7, then 9, so the solution must be 8. You see a blank spot that a bunch of big stars are getting thrown around by, it must be a black hole. We know how gravity and mass work from our own sun and planet. The sun is mass X and has a certain relationship with Earth which is mass Y. So if we see a giant star that is mass Y*9999999999 look like it's in the same relationship with a black hole, we can figure the black hole is mass X*999999999.

[@sig1761]

its more like minesweeper than sodoku i think

[@Topshelfloser3324]

“The world is fucked”💀😂😂 well said

[@limburgishmapping7166]

Eh, none of those black holes actually pose a threat to the earth due to their distance.

[@hamper6511]

@@limburgishmapping7166 you never know when one is flinged into our direction

[@limburgishmapping7166]

@@hamper6511 Thing is, we do know, the closest black holes that we know of were discovered last year and they're more than a thousand light years away. We'd have ample warning time. And I was more talking about the black holes that were the focus of the video, those black holes are even further away. Even if there was a black hole we didn't know about, it would still not be a threath to us as we would still see its gravitational effects on nearby stars and the chance that it'd come our way and actually destroy the Earth is still infinitesimally small.

[@hamper6511]

@@limburgishmapping7166 the chances happening isn't small either It's a 50/50 Just like always

[@limburgishmapping7166]

@@hamper6511 No, the chances are definetly infentesimally small. Space is way to big for such an unlikely scenario to happen. We're more likely to get flung out of our orbit by Mercury than that a black hole would destroy the Earth. It's definetly NOT a 50/50, it's never a 50/50, if that were the case the planet would no longer exist.

[@anderson74]

He is talking about massive as in the mass of a black hole, not it’s size. Massive means a lot of mass in this situation.

[@douglasostrander5072]

It doesn't even exist in time. What it does I guess we have some math for if you don't go beyond the abyss.

[@stormrungaming]

Black holes grow.. Mass corresponds to size directly.

[@fbi3233]

@@stormrungaming no mass does not correspond to size, if you pick up a 2x2 inch cube of aluminum it would be significantly less massive than a 2x2 inch cube of gold, mass is weight not size

[@xenotypos]

@@stormrungaming Technically, black holes don't even have size, they're just a singular point. The event horizon, the area in which light can't escape, has a size. We have approximations of the size of the event horizon of a black hole relative to its mass, but we don't really know for sure, it may vary.

[@fbi3233]

@@stormrungaming many dictionaries both say heavy and large, however in science *especially* in space, massive is referred to for heaviness

[@mac_gamingyt7699]

i absolutely love watching Lavs brain melt lol

[@anthrazite]

There's not much to melt lmao

[@mac_gamingyt7699]

@@anthrazite ooof

[@awelch31]

Physics man. Physics. That’s how we know. Mathematics of the universe. “What is everything?” 😂😂 I hear ya buddy

[@fractal4284]

The black hole doesn't need to be big to swallow something large the gravitational pull is so strong it rips everything apart into dust and it gets sucked right up

[@lyly_lei_lei]

Tidal forces. A black hole the mass of the moon in orbit right above the atmosphere would rip the earth apart.

[@roelkoot8625]

In dust? It gets turned to atoms

[@tylersauro9891]

The reason why primordial black holes are older than atoms is because when primordial black holes formed, the universe was too extreme for atoms to form.

[@ijansk]

What kind of matter were primordial black holes made of then?

[@tylersauro9891]

@@ijansk idk. You can look into the details on wikipedia or some other website on the internet. Link is below en.wikipedia.org/wiki/Primordial_black_hole

[@trent800]

@@ijansk Quarks, Protons, Neutrons. really any particle that was before the existence of Atoms

[@elijahaitaok8624]

Lav Luka: has an existential crisis from learning about space Me: “first time?”

[@RossM3838]

The black hole isn’t a tunnel. It’s a thing. Most things that come near them are pushed into orbit around them and only very slowly lose matter into them.

[@dudermcdudeface3674]

There's a "thing" somewhere in them, that we can't know anything about other than mass and rotation, but black holes are just a border through which information doesn't escape.

[@RossM3838]

@@dudermcdudeface3674 the border is the accretion disc, or the light ring that has been bent around the black hole.

[@5Bigfoots]

That's a theory, not a proven fact. No one really knows for certain what a black hole is, only what it does and based on what we know scientifically, we can only speculate on what it is. It's currently impossible to figure it out being limited in knowledge and technology.

[@tophers3756]

@@5Bigfoots still, it's not a tunnel. It's a twist of spacetime. What exactly happens in that twist we don't know.

[@tophers3756]

@@dudermcdudeface3674 we have no idea if there is a "thing" there. It's a twisted up region of spacetime. It's certainly not matter as matter gets ripped apart before the singularity.

[@letsplay5386]

This is one of the best videos ive ever seen. I almost choked while laughing

[@BBP749]

Thank you for actually noticing that there’s a black hole orbiting a black hole

[@OnceFan2013]

You should react to Becky Smethurst's video, "How do we know there's a black hole in every galaxy centre?" You keep asking "How do we know this?" and she explains it all in terms that are much clearer than the videos you have seen.

[@Fridge56Vet]

Liked the bit of behind the scenes they did at the end. Gives you an appreciation for just how complex calculating these estimates is - and how much more we have to learn.

[@warrior_of_liberation]

"Guy who never went to science school reacting to Black holes" Me : Gonna be fun video to watch 😂

[@MindForgedManacle]

God the size comparison always hits me with genuine awe, in the classic sense of the word: pure shock and wonder

[@KylerLiam]

When you said that you can't pronounce his name, i instantly knew it was Kurzgesagt.

[@trocoplaytv1254]

A black hole forms because of alot of mass being squeezed into a tiny amount of space (in a simplistic sense atleast)

[@cstein620]

In this video: Lav Luka has an existential crisis.

[@heyo80]

It really puts thing into perspective when you see how big the universe is compared to Earth. Black holes are the most interesting. I love seeing how confused Luka gets in these videos lol.

[@gigglepixel]

You have no right to say you understeand the size any better...you dont. Our mind cant work with these high Numbers We cant imagine it ....ever.

[@zetrollwatson6396]

Even black holes couldn't escape the absolute magnitude of being turned into a marketable plushie

[@Cosmic_Ray_]

I'm very interested in black holes because of how much they mess with space-time. I mean the closer you are, the more time is affected. You could circle a black hole for a few months from your prospective and decades would past from the prospective of everyone on Earth. This is why I love the move interstellar because it explorers this idea.

[@Baekstrom]

"They defy the laws of physics" No. The laws of physics defy your expectations of them.

[@vdfritzz]

3:30 atoms need separation and interaction between particles, a black hole has ZERO of that, everything is fully touching/overlapping (science is not sure, but it's possible that inside blackholes, 2 masses can actually occupy the same space)

[@BinkyTheToaster]

Carl Sagan called astronomy a humbling experience. He wasn't wrong.

[@nour_osman]

Oh bummer, I was hoping there was a link to the original video so I could go and subscribe 😅 And of course I forgot the name of the channel 🤦🏻‍♀️🤷🏻‍♀️😅 Anywho I thoroughly enjoyed this reaction! Thank you!

[@matts.6904]

Hey Lav, love your reactions. I think you'd find really this channel on YT called "Horror Stories" very fascinating. The guy who does the channel finds amazing, bizarre, tragic, or true crime stories and gives a good, non-hyped commentary on them, and most of them aren't very long either. Some of his videos I think you'd find very interesting are: "The Hillsborough Stadium Disaster," "John Jones- Caver Dies while Exploring Cave with family in Utah," "The Cecil Hotel: A Real American Horror Story," "The Station Nightclub Fire", "The Cavalese Cable Car Disaster," and "Man's Body dissolves in Hot Springs in Yellowstone National Park." Many of his other videos are really good, but these are some of the top ones.

[@nousername8162]

Fun fact: all black holes are the same size. Their “size” depends on how close light needs to get to not be able to return

[@chojin6136]

Having to put up with far too many creationists, it's refreshing to see someone that understands very little about science looking at it with such reverence

[@laumotan8862]

5:13 if a black hole smaller in size than earth were to just appear next to earth, it would probably sink to the center (or more accurately the center would move to it) and earth would collapse in on the black hole.

[@limburgishmapping7166]

So realistically, if one were to collide with the earth or would first rip out apart and suck it up as it passed through.

[@douglasostrander5072]

What they are giving you as a size is the event horizon a black hole is infinitely small. Crush time and space, we don't have the knowledge to describe it.

[@MichaelScheele]

The singularity is the geometric center point of a black hole. At the singularity, density becomes infinite. Which is why classical physics breaks down. The mathematics can no longer meaningfully describe what is... The "event horizon" is not a physical boundary. It delineates the point where light cannot escape the gravity of the black hole. If a given black hole is non-rotating, the event horizon would be a sphere with a radius equal to the Schwarzschild radius.

[@daenite2480]

A black hole is not infinitely small, that's a result of General Relativity's missing factor. It makes no sense for it to be infinitely small when Quantum Physics exists, that's why people are ttying to merge Quantum Physics and General Relativity in a way that works. The math is incomplete.

[@douglasostrander5072]

Prove it

[@daenite2480]

@@douglasostrander5072 the scientists themselves proved it, that's where I got the info from lol.

[@douglasostrander5072]

Figure it out noble prize for you.

[@jas1007]

If you really want to have your mind blown, react to MetaBall's Universe Size Comparission of Everything video. Considering the scale of galaxies and black holes, we often feel insignificant. But when you consider the scale of the subatomic as well, words like "insignificant" seem like hubris.

[@chilldon26]

I’ll admit, I watched this after smoking weed and this video was mind blowing to me

[@MitsukiDiablew]

"The world is fucked" 😂😂 had me dying

[@hareecionelson5875]

Finally, Lav Luka is able to view the universe as being made of space-time, and that's just the start of the video

[@TurmIIV]

6:53 scientists see matter (like a star) being ripped apart to or light moving weird around some point. That's how they discover black holes

[@LoneTiger]

When talking about space phenomena, you need to use the same analogy of fish in the sea: "There is always a bigger fish" 😁

[@masterduelrecap1588]

6:43 they spot abnormalities in the stars movement (usually if said star is being thrown around by an unknown object, then it's a black hole)

[@stevenguevara2184]

They observe the way things interact with them. Like the movement of a star thats orbiting one. Or the accretion disk. They are known for their density.

[@Astro-strategist]

Nice reaction! You should react to more kurzgesagt, in a nutshell

[@Cosmic_Ray_]

I always love seeing people being astonished about space. Just seeing their eyes light up learning about space; like watching a kid opening presents on Christmas.

[@grimreaper7170]

thng is most people have no idea what the topic they going to watch is about and they act so stupid about it when it is quite simple.

[@Cosmic_Ray_]

@@grimreaper7170 Even though they are ignorant when they are first introduced to a new topic, some might want to continue learning about it and might become well versed in it.

[@thescooshinator]

@@grimreaper7170 Definitely. They just get the facts wrong sometimes. In this video for example: "I know there is one [black hole] in this solar system"

[@mrpedrobraga]

@@thescooshinator I opened my eyes to that, like- what

[@Phosphorite05]

@@thescooshinator ok but how do you get this THAT wrong. I don’t even know where you would get the misleading info that we have a black hole in the solar system

[@austinreed5805]

I can see the innuendos flowing in as we speak.

[@Blynat]

One theory of intelligent life, is that it exists just so the universe can contemplate its self. Since we are all part of the universe.

[@ulisescabrera1058]

A theory from a movie that shouldn't be overlooked (that i genuinely consider) goes "if someONE in the far future ever discovers how everything in the universe works it will destroy itself and reconstruct itself into something much more complex and difficult"

[@ioulos5000]

A last point, and it's sad they didn't tell it in the video. The "Size" of the black hole here is the size of the event horizon, the sphere where light cannot escape. but the actual size of the singularity, where all te mass is concentrate have a size of : 0. yes, no size, no volume, just a point in the universe with infinite density.

[@susanapplegate9758]

This is so incredible, love your channel

[@MichaelScheele]

The Milky Way galaxy (ours) has a central supermassive black hole. As far as I know, we have no black holes in our solar system. They would mess up planetary orbits.

[@kittycat2169]

It's Sagittarius A

[@osatooyemina4448]

The reason why people can find black holes is because black holes have so much gravity that they can blend light

[@fancymustache3793]

To answer your question at like 5 minutes in the way a small blackhole would eat up the object next to it is stretch it out in a way known as "spagetification" where the end of an object closer to the center of a blackhole is being pulled on harder. By doing this the object would be dtretched into eventually a steaming line of plasma into the black hole

[@austinreed5805]

I suggest reacting to Top 22 Scariest SCP’s by Tats Topvideos.

[@tomwicke4682]

They don't really find black holes instead you can mesure the gravitational impact of a black hole and the surrounding matter e.g. when it's absorbing a star.

[@MTStingray]

5:10 being small is what black holes do, typically. The reason they exist is because the matter in said object is unable to cope with the amount of mass in the object, and being unable to combat the levels of gravity, it infinitely collapses in on itself, to what we believe to be an infinitesimally small point.

[@BKG0730]

I love these kinds of vids! Keep em coming

[@nikhilnagboth8425]

The other problem in studying black holes is that we are looking at the past when looking at space. For example, a space object 1 billion light years away from us will only finally be visible 1 billion years after its birth. Therefore, we would see how the object was 1 billion year ago, not how it is now. Another example is that the Sun is 10 light minutes away from us, so we only see the Sun how it was 10 minutes ago. Using this logic, we technically have no clue how any of the observed black holes really look like at the moment since they are probably millions of light years away from us.

[@mattisgrotegerd4527]

The music in their videos absolutely slaps.

[@jamiegossett]

it's wormholes that allow travel to other places. black holes stretch you like taffy and then compress you to a tiny atom sized speck

[@TsarDragon]

What I find amazing is how all black holes are the same size (physically but not visually) since all of the mass is described as being compressed in an "infinitely small space", which means it also has an infinite density. When we talk about the size of a black hole we're actually referring to the 3-dimensional shadow it casts (the black ball that we see in all the pictures). It's like a super particle that can't be touched by anything without being annihilated. Terrifying yet it makes me excited to know such crazy shit exists out there.

[@andrewmckenzie292]

Its also nice to know there's powers out there that no modern politician or government will ever get close to.

[@chrisserfass8635]

Hi Lav Luka you should do a reaction video of Killdozer or Man steals a tank and goes on a rampage. Or possibly the Pepcon Explosion.

[@Mr-vy7zf]

Well Lav, the reason why high mass is being contained in small size... well not even a reason, it has it's own name aka it has high density (kg/m^3), and if we talk of density of Black Holes, it gets ridiculously high, the distance between subatomic components there is approaching zero which practically makes it able to approach really small sizes despite they huge mass I dunno if I'd be able to "compress" my explanation to a little better form, maybe it'll collapse to a Black Hole, too lol

[@Jzombi301]

i love your reaction to this

[@thelatinist5024]

When we talk about the size of a black hole, we’re talking about the size of the sphere within which the pull of the black hole’s gravity is so great that nothing can escape, even if traveling at the speed of light. That’s the Schwarzchild radius. We can calculate that easily because we know how the force of gravity relates to mass and the escape velocity of objects.

[@finnmcdade2977]

This goes from "how are they so small" to "how are they so large

[@jacknassif7395]

More Canada reactions please! 🇨🇦

[@Longey9000]

Ok

[@sentrosity9176]

Ok

[@spoooopypoooooooooopy970]

Ok

[@Tkdriverx]

Kurzgesagt is a channel I would love to see you react to more. They have tons of space and science related videos, that have an absolutely insane quality about them and easy to digest.

[@robertroach4]

Btw this is all in the observable universe. This is only what we can see with the technology we have there could be an even bigger universe than that.

[@Souledex]

Nothing really to do with technology more just how seeing works at all.

[@andrewmckenzie292]

Even when "scientists" find it out, they use the best estimates they can come up with, but because they are scientists it is treated as official until it is changed in the future by a scientist of equal or higher rank.

[@matapros69]

3:25 u dont need matter to create a black hole, just enought energy, and there is a type of black hole called kugelblitz, which is a black hole created from light and not matter itself

[@limburgishmapping7166]

Yes but they were likely created from sub-atomic particles rather than energy in this case.

[@Ruosteinenknight]

Scientists are actually already preparing for next classification of black holes, suggesting that black hole with 100 billion solar masses would be named "Stupendously massive black hole". None of that size have been found. Yet.

[@andyb1653]

Theoretically, all black holes are the same size. It's the so-called "event horizon" (the distance from the singularity at which light cannot escape) that gets larger, as the mass of the singularity increases.

[@cortster12]

Nope. We just lack the understanding to describe the physical size, so we get errors in the math. The schwarzschild radius is about all we know, really. Since the absolute mass is all we know.

[@andyb1653]

@@cortster12 Hence why I said "theoretically". It's beyond our current ability to image or measure, but several physicists have postulated that a "singularity" is literally a single point, a zero-dimensional object, if you will. It would possess mass but not volume. Therefore, the only difference between the Great Annihilator and TON-618 would be mass. Since their masses differ greatly, but neither object has a "size" to speak of, only the radius of the event horizon (which is not a physical "object") would be different. Again, this is all theoretical. No one knows for sure just yet.

[@ulflarsson9693]

Bigger dying stars = bigger black holes. It is a big black hole in the center of our galaxy, the milky way.

[@Thisandthat8908]

people always forget that even black holes have to respect physics. Like orbital mechanics. So things don't just drop straight into the next black hole. Or the Milky Way being sucked into Sagitaius A*.

[@publicslayer1443]

the universe has no obligation to be understood by humans.

[@gmchris3752]

Looking at black holes is like watching a guy get his ass kicked by an invisible man. You can figure out how strong the invisible man is by how hard the guy gets punched, fist size by the bruising, and shoe size by the bloody footprints, but it's all just educated guesswork. My favorite thing to remember about black holes is that when they talk about "size," they mean the event horizon (the point at which everything goes black because not even light can escape). But black holes are more like the whirlpool when you drain a bathtub, and the hole everything gets sucked into is actually INFINITELY SMALL! Black holes differ in mass (and therefore the strength/distance at which they suck things in), but all of them are just pinpricks in spacetime!

[@seiggrainhart4719]

To blow your mind for a second time, due to the nature of our understanding of physics, it is theoretically possible that there are things even larger than the things discussed in that video. This is because of the fact that the Observable Universe only equates to the theoretical "age of the universe." I say theoretical, as this "Age" is based on cosmic radiation that is assumed to have been caused/around since the big bang, and the is used to predict both the age and size of the universe. However, due to how physics works in our understanding, it's not perfectly accurate due to everything being based on the speed of light. While yes, we have yet to find anything out there that indeed does seem to be older than the estimated age of the universe, the universe is so mind-bogglingly large, that it might take a further billion-billion years to discover such a thing. Now, don't get me wrong, I am not outright disputing the age of the universe, as I have no proof to believe it's wrong. However, with the nature of science, the absence of proof does not exactly mean either way. That is to say, just because we haven't found something like that yet, does not mean it doesn't exist. It just means it's so far away that nothing we've developed can detect it. Yet.

[@GreaterD]

Funfact, Schwarzschield, created his calculations while getting shot at in the trenches of World War 1

[@999madgamer]

the music in the video is amazing

[@axelord4ever]

This is probably explained better in their Black Hole videos, but in this case the 'sizes' mentioned are about the _even horizons,_ not the object themselves. The trippy thing about black holes is that they are, all, singularities with a volume of zero (i.e. nothing). No matter the size of their event horizons, their only distinctive feature is their mass.

[@Honk4frogs]

Black holes aren't formed with atoms because atoms are not dense enough. To get that much mass into such a small space, the fundamental particles that make up atoms are basically squished together, much much much closer than they'd like to be.

[@danielleporter1829]

Now we know where every pair of socks 🧦 in the world 🌍 go after they're washed 😂

[@billpecoraro8421]

At 5:34 "a black hole consumes something a million times bigger than it" What sometimes helps is not to imagine the black hole "consuming" things, but things are "falling into" the hole instead. As more things fall in, the hole gets larger... and bigger and bigger things fall faster and faster into it. So with your whole "black hole next to Earth" thing, if the Paris-sized black hole was right next to the Earth the very first thing that would happen would be the Earth would be torn apart. Earth is currently orbiting the Sun at like 90+ million miles (180+ million km roughly) and this Paris-sized black hole is generating almost 3x the gravity of the Sun right next to Earth. The result is that the North Pole is getting pulled in a very different direction than the South Pole far more forcefully than it's being pulled by Earth's own gravity, so something's got to give and the Earth's spherical construction is going to lose against any black hole of any size that's near enough to it for long enough every. time. The next thing that would happen would be the remains of the collapsed planet would be pulled into an "accretion disk" around the black hole itself as the black hole slowly absorbs the planet's matter falling into it. Then it's over and the black hole goes off into the universe having barely noticed absorbing a planet less than a trillionth of it's total mass.

[@SUNBEAM_404]

He refers to kurzgesagt as one person despite them constantly referring to themselves as a group.

[@nasuscapilli9160]

A teaspoon of a neutron star can weigh in at a billion tons

[@aternias]

“how do scientists figure this stuff out?” Short answer: quantum mechanics and mathematics. They arrive to these conclusions using mathematics and our current understanding of physics.

[@Hex_Altruism]

The volume is loud, but so worth it... react to The Incredible Sound of the Falcon Heavy by SmarterEveryDay

[@briankirchhoefer]

Geez don't tell him that. He finally got the sound where I can hear him.

[@scottnunnemaker5209]

We probably can’t find those tiny black holes from the beginning of the universe because they are those giant black holes that we can see now.

[@Bez_straha_od_zla]

Every time i watch this animation, despite fact I know its just animation I feel such a fear. No horror movie can make me feel like this... I guess its related to that old saying "how small we are"...

[@Alex-hj2jd]

The calculations for black hole size aren't completely accurate because they assume that the black hole is not spinning, but all black holes are spinning at very high speeds.

[@dedsussybaka4619]

Wait every black holes in the world are spinning? I thoght there are 2 types of blackhole

[@Alex-hj2jd]

@@dedsussybaka4619 Yeah, all black holes are rotating black holes.

[@Moxxieful]

if TON 618 can fit 11 solar systems inside, my question is, whose the one that fit TON 618 along with maybe other bigger single bodies inside it?

[@ouch9402]

It is inside a giant galaxy yet you cant se the galaxy because the UMBH's accretion disk outshines all the stars located inside the galaxy. TON 618 shines brighter than galaxies containing billions of stars.

[@rasmuswhittembury6350]

Luka: I know theres a black hole in our solar system.

[@ArcticTron]

Well since you've done a space reaction, a reaction to one of melodysheep's videos would be a neat thing to see.

[@hakkefeke9236]

He has reacted to one of Melodysheeps videos, already (Timelapse of the future).... But... Yes, please! I`d love to see his brain melt while watching Melodysheeps Life Beyond Part I and Part II... These videos belong to the best videos YT has to offer

[@ArcticTron]

@@hakkefeke9236 Yes that is what I meant, perhaps I should have been more specific.

[@osatooyemina4448]

Did you know that you can make a black hole out of anything but only if you can press it enough to make it collapse onto itself

[@MrStreaty122]

The reason why theres such a weird size/mass ratio for black holes is because of what they are. Black holes aren't actually the object doing all the gravitational manipulation we see happening around them. They're what forms around the object doing it. You see, the cores of black holes, called a singularity, has an infinite density. No, I'm not exaggerating it is literally infinite. The singularity is called such because all of the mass it has is packed into an infinitely small point, creating an infinite density and thus such a weird range of properties. The strength of gravity, as a function of velocity, is a square of the distance between two objects. So, the closer you get to an object, the faster you're pulled. The reason why black holes form around singularities is that because the singularity is infinitely dense there is enough "empty" space around it such that the schwarzschild radius becomes a physical barrier. The schwarzschild radius is the distance from a singularity, or really anything with mass, where the velocity you'd need to overcome its pull, also called the "escape velocity", exceeds the speed of light. Since nothing with mass can travel through space faster than light, nothing ever escapes the event horizon. Once you're past it, you ain't going no where. Also, since the mass of the singularity is not infinite, the schwarzschild radius only grows larger as the singularity collects more matter. Hence why you can extremely high mass black holes that aren't that much bigger than Earth.

[@ezekiyam3827]

5:54 it does lol it defies everything especially gravity

[@EmperorofPenguins]

Black holes don't absorb matter into themselves, they just take mass from things that get too close. If a black hole the mass of our sun were to replace the sun, the planetary orbits wouldn't change much since the gravity from the black hole would be about the same.

[@diGritz1]

The reason it can be so small yet so dense is that atoms are 99% empty space, including you. For instance if you removed all the empty space from the Empire State Building the mass left over would be about the size of a grain of rice. It would however still weigh the same. You also need to understand that anything can become a black hole. The size of it dictating the size of the black hole. If you compressed the Earth to the size of a US penny you get a Black hole the same size.

[@andrefelipe4416]

you should put the link of the video you are reacting in the description