No video :(

Black Hole Harmonics

Подписаться 3,1 млн

Просмотров 555 тыс.

50% 1

Learn more at www.brilliant....
PBS Member Stations rely on viewers like you. To support your local station, go to: to.pbs.org/Dona...
Black holes are crazy enough on their own - but crash two together and you end up with a roiling blob of inescapable space that vibrates like a beaten drum. And the rich harmonics of those vibrations, seen through gravitational waves, could hold the secrets to the nature of the fabric of spacetime itself. Today on space time journal club we’ll explore the papers that claim to have detected black hole harmonics. We’ll also give you the latest updates on the most recent - in some cases quite bizarre - LIGO detections.
Sign Up on Patreon to get access to the Space Time Discord!
/ pbsspacetime
Check out the Space Time Merch Store
pbsspacetime.com/
Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Murilo Lopes
Directed by: Andrew Kornhaber
Executive Producers: Eric Brown & Andrew Kornhaber
End Credits Music by J.R.S. Schattenberg: / @jrsschattenberg
When physicists talk about black holes they’re usually referring to highly theoretical objects - static, unchanging black holes viewed from “infinitely” far away. This makes everything clean and simple enough to attempt the already notoriously complex calculations of black hole physics. But real black holes are created in the violent deaths of massive stars, and there’s nothing clean about that. And we now know that black holes merge - and in the process produce gravitational radiation that we’ve only just managed to detect with the miraculous work of the LIGO and VIRGO gravitational wave observatories. In the instant after its merger, the new, joined black hole looks nothing like the idealized theoretical black hole.
Special Thanks To All Our Patreon Supporters
Big Bang Supporters
Anton Lifshits
David Barnholdt
David Boyer
David Nicklas
Fabrice Eap
Juan Benet
matt miller
Morgan Hough
Quasar Supporters
Mark Heising
Mark Rosenthal
Vinnie Falco
Hypernova
Chuck Zegar
Danton Spivey
Donal Botkin
Edmund Fokschaner
Hank S
Joe Pearce
John Hofmann
John R. Slavik
Jordan Young
Joseph Salomone
Mathew
Matthew O'Connor
Syed Ansar
Gamma Ray Burst Supporters
A G
Adrien Molyneux
AlecZero
Andreas Nautsch
Bradley Jenkins
Brandon labonte
Brian
Dan Warren
Daniel Lyons
David Bethala
DFaulk
Frederic Simon
Geoffrey Short
Graydon Goss
Greg Smith
James Flowers
James Quintero
John Funai
John Griffith
John Michael Kerr
John Pollock
John Robinson
Jonathan Nesfeder
Joseph Dillman
Josh Thomas
Justin Lloyd
Kevin Lee
Kevin Warne
Kyle Hofer
Malte Ubl
Nick Virtue
Nick Wright
Paul Rose
Scott Gossett
Sean Warniaha
Tim Stephani
Tonyface
Yurii Konovaliuk

Опубликовано:

26 авг 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 1,3 тыс.

@TheStarchamber 4 года назад

As a musician, I'm surprised by just how much this made complete sense. Anyone who plays low-tuned bass guitars knows that the second harmonic is usually louder than the fundamental. Hence why tuners like to not show the note I want to tune to and instead show the perfect fifth because that overtone is louder...

@SgtMacska 3 года назад

Very cool observation! But the fifth is the third harmonic. I think on an acoustic guitar it’s the second harmonic (an octave above the fundamental) that would tend to be the loudest. Is it the third harmonic on a bass?

@SgtMacska 3 года назад

Actually I might be wrong about the acoustic guitar. Weird to think we’ve been listening to parallel fifths all this time

@Joshplaysguitar69 2 года назад

Wow, i never realized why my E would tune to C until now.

@progfox 2 года назад

yea thats one of the reasons i dont to more than a low b on my bass lol

@joshyoung1440 Год назад

@@SgtMacska no, the fifth is the second harmonic. First is octave. Second is fifth above that. Unless you're using different nomenclature? Like mixing up first position and first inversion when talking about figured bass?

@XIIchiron78 4 года назад

It's absolutely mind boggling the amount of information we can get from vibrations that are smaller than the diameter of a proton. LIGO is an awesome project!

@dennycote6339 3 года назад

I can't wait for the space based observatory.

@pierfrancescopeperoni 3 года назад

I can't wait for my sandwich.

@pepe6666 2 года назад

@@pierfrancescopeperoni did you get your sandwich?

@pierfrancescopeperoni 2 года назад

@@pepe6666 No, it's moving too fast.

@stuartschaffner9744 4 года назад

I had a very long interruption in my physics graduate studies, so I learned general relativity twice. The first time was in the late 1960's and the second at roughly the turn of the century. In the 1960's this was all theoretical. Supercomputers of that time were extremely expensive and not much more powerful than today's desktops. The work was fun, exciting, but extremely limited. None of us dreamed that we would get real data from an actual black hole merger, much less a continuing stream of new signals. As it was described to me at the time, Einstein's primary tool was Occam's Razor. The details were long ago and far away, but I recall that he posited that everything could be described by a curvature tensor that had 64 real numbers. Starting with the simplest terms, he set values that he felt were required to satisfy the known data, and set all the rest to zero. He was surprisingly right. Now it seems that he was spectacularly right, as was William of Occam. Certainly the story will get more complex soon, but much of what we know now to be true came from Einstein's faith that the universe was at its roots simple.

@NelKarlsonMercado 4 года назад

Some of you who is reading this, didn't finish it...

@joshdenbeaux6594 4 года назад

Fascinating. Thank you.

@RovingTroll 4 года назад

@Buck Barry I'm not a college educated physicist, but I love learning about these things. I find it frustratingly amazing how we have never found a tangible way to disprove(or at this point, improve upon) Einstein's work. And I absolutely love the science we've done by carving out an ever better understanding of his work.

@tapferetomate914 4 года назад

@@RovingTroll Dark Matter seems to suggest that Einstein isn't completely Right.

@Bitchslapper316 4 года назад

@@tapferetomate914 Dark matter is also highly hypothetical.

@wave17vp 4 года назад

It's amazing to think that we can listen to the universe to learn about it the same way we listen to things on Earth, but instead of vibrating air, the sounds vibrate space-time. I never thought of LIGO as a gigantic space-time microphone before.

@parnikkapore 4 года назад

And, unlike many other waves in Astrophysics, G-waves from black hole mergers are apparently within human hearing range!

@wave17vp 4 года назад

@@parnikkapore that's amazing

@DeathBringer769 4 года назад

Me on guitar: I can hit some pretty sweet pinch harmonics. Black Holes: Well, check *this* out...

@RichMitch 4 года назад

Anyway, here's wonderwall

@akshatsaxena1431 4 года назад

0 3 5

@sdfkjgh 4 года назад

Rich Mitch: What a coincidence, this is what I was listening to as I read your comment: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9OasxD_oP8M.html

@Kevin_Street 4 года назад

In spacetime music the black hole plays you. We're all part of the instrument when space itself is vibrating.

@Eireternal 4 года назад

"Hold beer no?" -black hole "Ok come on" -me "Ehh me can't give. Only take." -black hole

@d3sync777 4 года назад

Everyone else: Does Extreme Sports PBS: Does Extreme Space Time

@jzblue345 4 года назад

Ok that was a good one.

@maxbarth4788 4 года назад

A vast improvement

@RobertBelcher 4 года назад

This episode brings back aggravating memories for me. Twice I've lent my harmonica to a black hole... I never got them back.

@daddymuggle Год назад

Yes, but the black hole's rendition of Paint It Black was epic.

@jonathanelliott8869 4 года назад

I was thinking grav lensing then i saw that you thought of it..... dang it Matt, make me feel special

@kdhavle 4 года назад

I'm more primitive. I could recognize "mass and spin" before he said it. Made me feel special, too.

@brianmessemer2973 4 года назад

I'm a music theory teacher laughing at the fact that you just made a (fantastic) video on overtones and the harmonic series. 😃👍👍 Music of the spheres indeed!

@VoidHugger 4 года назад

@GET RAD Those who use others' jokes can't make them themselves.

@jamieg2427 4 года назад

@GET RAD Those who are jerks are jerks. 😂

@voidremoved 4 года назад

@@VoidHugger :

@LuckyMoniker 4 года назад

i'm a music theory flunkie so enlighten me, sonic overtones can be used to deconstruct the entire signal? By this theory, gravitational waves are behaving like sonic waves, so whats to stop Gravitational Sonar? seems like highly effective way to measure mass from a large distance

@VoidHugger 4 года назад

voidremoved ;)

@chamba149 4 года назад

"It has a .69 spin" Researchers:"nice"

@jasonduvall9480 4 года назад

People like you are the reason we're not exploring the stars yet.

@0mn1vore 4 года назад

@@jasonduvall9480 - If XKCD is any indication, scientists can have a gross, weird, childish sense humour like anyone else, and still be great at science. Possibly grosser, weirder and even *more* childish than regular folks...

@aks9545 4 года назад

@@jasonduvall9480 you should be the subject of your own comment

@HowieHellbent 4 года назад

@@jasonduvall9480 I disagree

@osaiha5913 2 года назад

@@jasonduvall9480 naw it's our economic system that breeds stupidity because you don't need to be smart to make someone else richer and the rich aren't incentivize to innovated. They are incentivize to make a profit.

@DrStrang3love 4 года назад

As a chemist, I can't help but notice some at least superficial parallels between black hole harmonics and atomic orbitals.

@rudyj8948 10 месяцев назад

I believe both are ultimately derived from spherical harmonics, so I don't think the connection is all that superficial!

@ralphc.644 4 года назад

The spherical harmonics table at 4:14 reminds me of the electron orbital shapes table (s,p,d,f,etc). It's nice to see giant things like black holes and tiny things like atoms agreeing on something. \o/

@pgoeds7420 4 года назад

Not surprising as you get spherical harmonics by integrating (Shrodinger's) wave equation in 3D.

@YvonTripper 4 года назад

The worst thing about black hole mergers are the layoffs: "I'm sorry, despite the general theory of relativity positing that it is impossible to escape a black hole, we're going to have to let you go. But don't worry, you'll be given a generous package of Hawking radiation."

@Fahamut 4 года назад

I gave you a thumbs up because you are clearly a geek and need all the love you can get. I love corney original humour and therefore love you! Sorry not in that way.

@MuhammadHanif-bx4pb 4 года назад

NIICEEEE !!!!

@robertditto8673 4 года назад

Hahahahahahahahahahahaha!!!!!! Love It!!!

@tomkenney5365 4 года назад

"We're gonna have to let you go, but since you can't leave, and you're just gonna be hanging around, here's some information to store."

@joaquinel 4 года назад

And a magic lantern that only lights up down. Maybe I need to improve my English.

@whippedcreamguy8564 4 года назад

Space: Noise is no no Black Holes: *sans in harmonics*

@abstract0407 4 года назад

I came here from a gay jojo video stream

@spoonikle 4 года назад

The detection of gravitational waves was such a massive game changer. Massive leap forward in the human understanding of the universe. We need to get that orbital interferometer set up.

@leofu97 2 года назад

Matt explaining the overtone series better than any music theorist - imagine what great music could be made if there was more collaboration between physicists and musicians...

@williamcopeland4110 Год назад

Music is applied physics. It's all oscillations.

@tomareani512 4 года назад

Remember: If he EVER ends an episode by saying something other than "Spacetime", we RIOT!

@AndreLeRoux81 4 года назад

Pitchforks and torches, ready...

@adumberfling9959 4 года назад

All I got are khakis and tiki's...

@paulhench7762 4 года назад

He already ending one with TimeSpace! But not pitchfork worthy, I deem!

@tomareani512 4 года назад

@@paulhench7762 correct. Space and time are two sides of the same coin, and are interchangeable in this case. Therefore no offence was committed.

@paulhench7762 4 года назад

@@tomareani512 Totally agree. This guy is the best: Neil deGrasse Tyson eat your heart out!! (ha ha!!)

@urinater 4 года назад

FUN FACT: Your farts also create a gravitational ripple in spacetime

@sunitapalissery258 4 года назад

Exciting times ahead. Thanks for keeping us informed

@aghosh5447 4 года назад

Pbs space time you are doing amazing work. Dont know how many children are getting to learn such a beautiful higher science concepts through you and are being intrigued.

@chrisgeggis5603 4 года назад

I can highly recommend the book "Ripples in Spacetime" by Govert Schilling and Martin Rees on this topic. I read it last year and was so impressed with the description of the observatory that I made a pilgrimage to Livingston, LA to see it for myself.

@professormemebrain1352 4 года назад

You're probably the most relaxing science related RU-vid channel I follow, keep up the great work as always

@xarmanhskafragos2516 4 года назад

3blue1brown

@RichMitch 4 года назад

Tibees!

@maniestacio9245 4 года назад

Allow me to introduce you to Journey to the Microcosmos ✨😌

@RichMitch 4 года назад

@@maniestacio9245 French whisperer

@420frankp 4 года назад

Hello wonderful person. Living in a black hole I see. Go check out Anton Petrov. "What da math."

@Sollace 4 года назад

It's insane how fast this has all developed, from the first photo of a black hole just a few months ago, to scientists proving Einstein right yet again!

@jpvlsmv2023 4 года назад

The two collisions so close together were the mutually-assured destruction of two advanced societies who battle by throwing black holes at each other.

@RedRocket4000 4 года назад

Ah a Lens War.

@chrissonofpear1384 4 года назад

Or Xeelee Saga?

@ekeys6897 4 года назад

who knows... lol!

@anteconfig5391 4 года назад

Well, how else are you gonna get rid of an immortal?

@PeterB12345 4 года назад

Or perhaps a black hole weapon was deflected by intercepting it with another black hole? Point defense?

@jamielonsdale3018 4 года назад

Also, to say that these BH/BH mergers took place at almost the same time is to forget that time is directional. No matter where you are, time regresses radially at c. If BHM1 2 lightyears away from Earth explodes, and a year later, BHM2, almost perfectly in plane also explodes 1 lightyear away, the further explosion and the nearer explosion would appear to happen almost simultaneously. Viewed from 2 lightyears away on the opposite side of Black Hole Merger 1, those explosions would now be viewed 2 years apart. This is because BHM1's information would get halfway to the observer before BHM2's information even sets off, then a year later, BHM1's light will reach the observer, as BHM2's light passes the point in space where BHM1 occurred. That light still has two years of travelling to occur before it reaches the observer, and that's all without the added complication of relativistic motion and expansion. Your observation of the past is relative to your position to the past.

@Niscimble 4 года назад

If you feed a rope into a black hole, what would it look like as it neared the event horizon?

@wompbozer3939 4 года назад

Niscimble Could you pull it back out? Or would it come back all spaghettified? It could possibly pull you in in a Pennywise the Clown type scenario.

@whoofianbrony8804 4 года назад

Black holes: *THIS ISNT EVEN MY FINAL FORM!*

@Night-Chan 4 года назад

Kai ok en!!!!

@mcintoshdev 4 года назад

"Cough Cough Gravitational Lensing cough cough" LOL

@might_e 4 года назад

“A so-called ‘Dimensionless Spin Magnitude’ of .69-“ Nice.

@srgkzy1294 4 года назад

yes!

@jamesfowler6306 4 года назад

How does a singularity spin?

@Br3ttM 4 года назад

@@jamesfowler6306 A singularity means a lot of physics ends up with dividing by zero trying to describe it. Spin is just one of a list.

@daddytito917 4 года назад

Emmanuel Landwehrle nice

@HolyMith 4 года назад

@@jamesfowler6306 The singularity (presumably at the "centre" of the black hole) doesn't spin at all, being dimensionless. The spacetime that is warped by the singularity does spin however. Think of it like a whirlpool: the object clearly spins, but if you were to ask what is spinning, well it's just the water itself.

@tiborszobonya8018 4 года назад

Slightly unrelated question: How do we know that black holes are points of infinite density? What if it just a sphere, like a neutron star, just much more dense? Compressed to the point where the matter (whatever particles it consists of) cannot be compressed anymore. I mean "point of infinite density with finite mass" doesn't really make sense.

@zahirkhan778 4 года назад

i would like to see this answered in the next QA

@Skepticfornow 4 года назад

We know this because extremely smart people that do extremely complicated math have taken the time to figure it out

@pancracio1710 4 года назад

I think thats just how the math works. We know the theories we have are incomplete, so as of now we just act like its a single point but really its an unknown.

@1Wanu1 4 года назад

No knowm mechanism to stop the collapse + the fact that we see them black and not a new type of star?¿

@radiowallofsound 4 года назад

When the only math function we've got to explain some phenomenon returns a singularity at a given input value, we say there's something infinitely small or big in that phenomenon. But i guess that doesn't mean there actually is, it's just the best description we've found so far to explain and predict it. Someone with more knowledge might correct my guessing please?

@DavidKennyNZL 4 года назад

The first sentence packs so much in the brain reels to keep up as I re-watch it again and a gain. "Black holes are crazy enough on their own - but crash two together and you end up with a roiling blob of inescapable space that vibrates like a beaten drum."

@joyce_rx 4 года назад

I can imagine an insanely advanced civilization that uses black holes in orchestras

@QlueDuPlessis 4 года назад

The band's name is, "Disaster Area" and they previously crashed a ship into a sun. This was documented in, "The Restaurant At The End Of The Universe" by Douglas Adams. Sadly, Douglas Adams passed on before documenting their greatest concert where they merged blackholes. (It has been suggested that if you adjust their concert timelime to a more human-appreciable time scale, it sounds a lot like the 1812 overture...)

@brockborrmann2931 4 года назад

The 1,812,000 overture?

@fuckYTIDontWantToUseMyRealName 4 года назад

Terrifying. I wonder how much mass they would waste in the process.

@chuuuu1131 4 года назад

I just realized that the background is moving. I can't unsee it now

@flymypg 4 года назад

The only remedy is to Stare at Matt's T-Shirt. Then, of course, go get some merch...

@chrisrichardson4693 4 года назад

I think your just too high. Or I am. Cuz I cant see it moving

@chrisrichardson4693 4 года назад

Woah holy shit nvm I see it now

@jamielonsdale3018 4 года назад

Nothing is moving, it's just changing colour. That's how pixelated displays work.

@legendofman12 4 года назад

Thank god i thought i was just high

@forciblez4218 4 года назад

Making music with gravitational waves be like :Ｏ00Ｏ0Ｏ0ＯＯ0 ( ik it's bad )

@KrisCadwell 4 года назад

Thanks to my knowledge of music and audio production I actually have some idea what this episode was about! I'm sure it's just an anomaly. Great episode.

@mattym8038 4 года назад

Typical Aussie, always thinking about those Waves

@Luwab 4 года назад

so very much like two drops of water merging together, interesting. Or two vortexes

@EvilSnips 4 года назад

Last time I was this early the four fundamental forces hasn't separated yet.

@avs6362 4 года назад

General Relativity is not the final frontier, but still it is awe inspiring how Relativity is holding up in almost every way...

@avs6362 4 года назад

@XY ZW Why ?

@avs6362 4 года назад

@XY ZW Well then what about the Gravitational lensing, and slowing of the clocks in Satellites and Gravitational waves? These are the observed phenomena. How else would you describe it? And why we are not able to accelerate the particles beyond the speed of light? Particle accelerators support Relativity!

@avs6362 4 года назад

@XY ZW Thanks for the explanation and reference, I'll study further!

@rrryan9719 4 года назад

Professor O'Dowd is the best professor. Change my mind.

@danieljensen2626 4 года назад

Amazing how fast we are going from barely detecting gravitational waves at all to using gravitational wave signals to analyze the things emitting them.

@danieljensen2626 4 года назад

@XY ZW Please stop watching conspiracy theory videos.

@RedRocket4000 4 года назад

@XY ZW Your trolling and thus probably wasting my time but we not talking about 2D objects we talking about 3D objects bending 3 +1 SpaceTime. If your referring to the Singularity that is a 1D object but the effects we observe are of the area around that which do bend space. If Singularities actually exist or are actually really small 3D objects. Mat covered before majority of physics not believing singularities exist because they violate ideas on Quantum Mechanics.

@karnagereaver8313 4 года назад

"WhaT Is ThaT MeLODY!?"

@anugrahmathewprasad172 4 года назад

What's that M'Lady

@loganmoseley 4 года назад

Anugrah Mathew Prasad Quoting Overwatch’s astrophysicist character “Sigma”.

@xamesm 4 года назад

Darude Sandstorm

@averyseriousguy5784 4 года назад

Karnage Reaver Dam it you beat me to it

@katapellos7 4 года назад

Loooool

@elliottcooke6426 4 года назад

I just realized that the beginning audio clip of PBS Digital Studios is the Mr. Rogers Remix, reversed.

@BoomerZ.artist 4 года назад

Thank you for putting a time scale. I get so annoyed when things are said to happen "quickly" but don't actually say how quickly.

@RyllenKriel 4 года назад

Hey hey we're the Monkees! People say we oscillate around! Takes quadrillions of us to make black holes! But only gravity will keep us down!

@SpecialEDy 4 года назад

A thought that has caused me to lose a lot of sleep, the Legrange Point between two colliding black holes. Imagine you had two black holes traveling at 99% of light speed, on a collision course where the event horizons temporarily overlapped, but the singularities at the centers missed the opposing original event horizon. Is it possible for the two to be on an escape trajectory, or does the overlapping and momentary merger of the event horizons disallow any escape trajectories? If they can escape, it would be possible to put balance a spacecraft on the Legrange point between the two objects, pass within the event horizons, and escape.

@jaytheamazing197 4 года назад

Once you get to a certain point, nothing made of matter can escape a black hole so that includes black holes themselves. The black holes would just collide and become one black hole so them splitting off again wouldn't happen.

@hosmerhomeboy 4 года назад

and now this will keep me awake too, thanks for the food for thought

@martijnbouman8874 4 года назад

I have thought of something similar. Suppose you have two charged black holes that you keep in place with giant magnets. Suppose you allow their event horizons to just overlap. A friend of mine calculated that if you treat the black holes as point masses, you should be able to travel right in between them without the escape velocity ever being bigger than the speed of light, due to both black holes (partly) canceling out each other's gravitational attraction. Would this be possible? If so, what would you see?

@SpecialEDy 4 года назад

@@martijnbouman8874 I've wondered if the event horizons would repel one another, since you are near a point, the Legrange Point, where the net gravity is zero. So you might be inside a bubble of space time surrounded by event horizon.

@SpecialEDy 4 года назад

@@jaytheamazing197 in the example I used, the singularities are on an escape trajectory moving just past each other's event horizons, but the event horizons themselves overlap.

@joaquinel 4 года назад

WOW AGAIN!! After re-repeated view... barely understand. Maybe. Anyway, it's not just a slogan, it s really exiting. New set of data means a whole eye opening, like telescope, like radioastronomy. * Right! When you punch a guitar string, the tune appears to change, from noisy to rich-non-tuned to rich-tuned to purer... The noise is not random. You hear chaos because the harmonics are stronger at start and the first to decay. So I believe you.

@Cavistus729 4 года назад

this is the only channel where i need to actually prepare myself to for the mental workout

@ntdscherer 4 года назад

Allow me to introduce you to Numberphile...

@Cavistus729 4 года назад

@@ntdscherer numberphile is a channel about mathematics. this channel is about the places and scales where mathematics seemingly kills itself.

@jerryfrancisco7035 4 года назад

Guitar: Which harmonics can you play? Black Hole: Yes.

@KalyanNC 4 года назад

Since we are dealing with black holes, is it reasonable to expect that the overtones don't really die completely but give rise to quantum effects at ultra-low amplitudes?

@garethdean6382 4 года назад

It is, and low amplitude effects are those most distorted by time dilation, to the point that they should never quite die away.

@vladdrakul7851 4 года назад

In 1968; on LSD the famous first Hippie band The Grateful Dead wrote this classic tune *'Dark Star'* about time and space. AMAZING! *Dark star crashes, Pouring its light, Into ashes, Reason tatters, The forces tear loose from the axis, Searchlight casting, For faults in the Clouds of delusion* [Chorus] *Shall we go, You and I, While we can? Through The transitive nightfall Of diamonds* *Mirror shatters, In formless reflections, Of matter, Glass hand dissolving, To ice petal flowers, Revolving,, Lady in velvet, Recedes, In the nights of goodbye* [Chorus] *Shall we go, You and I, While we can? Through The transitive nightfall Of diamonds* Wow that must have been some trip there 'Captain Trips' Jerry Garcia!

@davburns 4 года назад

I'm not an astronomer or a physicist but I still follow @LIGO on twitter. It thrills me to see, within a few minutes of a BBH detection, that there's one less black hole in the observable universe. Also the idea that gravity waves may be affected by (cough, cough) gravitational lensing (cough) is causing some higher order spherical harmonics in my mind.

@davepenaphd4300 4 года назад

Is resonance a concept that applies to gravitational waves?

@LeoStaley 4 года назад

From what I understand, when a guitar string vibrates back and forth, it does so because momentum is being preserved, losing energy as it slows down. The fabric of Spacetime itself doesn't have momentum, so why does it bounce back and forth when the black holes merge? Edit: I have heard of gyroscopes that use oscillation instead of rotation to achieve gryoscopic effect (like the gyroscopes in the JWST, or my smartphone), but I never understood why it worked as a gyroscope. Is the momentum in oscillation a kind of angular momentum in some sense? I still don't get how a black hole, a spacetime topological defect, can *spin*, but you already did an episode trying to explain that, so I might just be dumb.

@TygerTygerBrnigBrght 4 года назад

Id say it likes to settle into the lowest energy state, an oscillating mass vs a static mass, the static mass probably has a lower energy state. I am not a physicist tho.

@photinodecay 4 года назад

The field strength is the analogous quantity to the guitar string's displacement from the straight-line position. It's the energy of that displacement from the "zero" point that is being conserved.

@danieljensen2626 4 года назад

I think the semi-Newtonian picture would be to say the mass in the blackhole is what is doing the sloshing, and it then warps the spacetime around it. But alternatively, while Spacetime itself doesn't have momentum I think that gravitational waves might. Just like it doesn't make any sense to think of electric and magnetic fields having momentum, but photons definitely do. My GR isn't good enough to explain how that gives you oscillations in the event horizon though.

@QlueDuPlessis 4 года назад

This has to be one of the questions featured on the next q&a segment... I hope.

@NawiasemPiszac 4 года назад

@Brandon Piperjack Nope - it'd loose its energy by converting it to heat that gets radiated. Same with black holes. Those gravitational waves carry away energy making "ringing" die down.

@john-paulsilke893 4 года назад

Clang, clang, clang went the trolley; ding, ding, ding went the black hole.

@cheaterman49 4 года назад

Space Time Journal Club always makes me excited like a kid about to open some unexpected presents! And rightfully so - these findings are amazing, it would be very interesting to see if more data comes to confirm the no hair theorem (and confirm or deny the absence of electric charge in black holes), as well as some more studies about these coincidental events - what I assume you mean by gravitational lensing in this case would be that we're merely seeing echoes of the gravitational waves? Great video really, loved it!

@tomkenney5365 4 года назад

Great video! You smoothed over some bumps in my understanding. What blew my mind recently is about the info problem. Apparently information is written to the surface of a black hole, or the event horizon, not stored "inside." And the entire Google database could be written on a black hole a trillionth of a trillionth of an inch (in diameter, I think, but that's pretty moot).

@parnikkapore 4 года назад

...and the "hair" on black holes is used in quantum mechanics to resolve that information paradox. So if the no-hair theorem holds through, things will be _really_ fun.

@tomkenney5365 4 года назад

I'm beginning to wonder if black holes can be dumbed down enough for me to understand. Kinda have quantum stuff down. Well, I can say some of the right words in the right order. More or less understand fusion. But, yeah, I'm way over my head. Still trying, though.

@NewMessage 4 года назад

Did someone do the 'Great band name' joke yet? Yeah? 472 times? Oh, alright.

@Gunslinger416 9 месяцев назад

So cool that i came across this video. In 2020 I gradueted in Physics and did my thesis on quasinormal modes of black holes and Cosmic Censorship Conjecture. So good to comeback to this since i havent worked with physics since then. And I remeber reading both of this pappers by Teukolsky et al and making a presentation about it to my group

@gabrielpetre3569 4 года назад

Wait, so gravitational lensing can bend gravity waves?

@trbone95 4 года назад

Physicists: we've run thousands of simulations predicting the harmonics of merging singularities in spacetime Me: I can't find my glasses when they're sitting on my head

@narfwhals7843 4 года назад

Physicists: we've let computers run thousands of simulations predicting the harmonics of merging singularities in spacetime Also Physicists: I can't find my glasses when they're sitting on my head

@Saitama62181 4 года назад

Three hairs? Perhaps it should be called the "Charlie Brown Theorem" instead of "No Hair"? lol

@AlienRelics 4 года назад

Doh!

@feeberizer 4 года назад

I was 7+ minutes in before I realized the background was moving...

@navneetmishra3208 3 года назад

after reading your comment I saw that.

@Kevin_Street 4 года назад

Wasn't that long ago when we were all excited because LIGO detected the first gravitational waves. Now physicists are analyzing the overtones of black hole collisions and creating new fields of study like gravitational wave spectroscopy. It's amazing how fast the science is developing.

@g3netixmg36 4 года назад

I have a theory that black holes consume information and convert it to space contributing to the expansion of space time

@Giantcrabz Месяц назад

how tho

@7Alberto7 4 года назад

I love how my brain is like a blob when i finish to watch any PBS video... I'm trying...i'm trying my best to keep up with every word in the video i swear,one step at the time i'll improve my brain skill

@RDTRNT 4 года назад

Cool stuff, as always! Not sure if you ever did a video explaining how it might be possible to extract energy from a rotating black hole (Penrose process e.g.). If not, that looks like an interesting topic (for me).

@xavierinthetube 4 года назад

Wow, that was extremely cool

@boononthemoon 4 года назад

"Spin magnitude of .69" Nice.

@EverlastingSky 4 года назад

Two black holes. Close. 69. Nice

@GeneralLazySpoon 4 года назад

Nice.

@georgelastrapes9259 4 года назад

When those BHs first kiss, the instant (or Planck time) when the two (topologically understood) join, is something, a Poincare conjecture, or whatever, violated? Or at least subjected to a merciless stress test? Asking for a friend who is mathless.

@WodkaEclair 4 года назад

Me. The friend who is mathless is me.

@johnsorrelw849 4 года назад

Sounds like an interesting question that I don't understand.

@RedRocket4000 4 года назад

Depends if Gravity is actually a force. So far all evidence is Relativity is right and Gravity only a effect, a measurement of curvature of space time if that holds than it could be an instant and Singularities really are one dimensional. Glad you worded it both ways. As lots of Quantum Mechanics ideas have Gravity as a force it might be true and thus it would be a Planck tick.

@georgelastrapes9259 4 года назад

@@RedRocket4000 Those who argue that gravity is not a force but something else emulate the eminent philosopher Gustav Freitwig, who discovered that there is no such thing as a chair. What we call chairs are only small padded tables for the buttocks ("Arschtafeln"). Concerning singularities-- a region of space has finite density, and then infinite density-- but there are no numbers larger than any real but smaller than infinity. How is this gap crossed?

@doku3809 4 года назад

What would it be like to be in the centre of two colliding equally sized black holes?

@no_more_free_nicks 4 года назад

Good video, great subject!

@MelindaGreen 4 года назад

Where can we listen to these ring-down harmonics?

@BenMitro 4 года назад

I think Einstein's GR should get an A+ about now.

@WilliamFord972 4 года назад

This made so much more sense when you put it in musical terms.

@rickhobson3211 4 года назад

Some of those patterns in the merger simulation reminded me of electron orbitals.

@revenevan11 4 года назад

Yep, both come from the same mathematical equations of spherical harmonics! This episode gave me flashbacks to struggling to understand spherical harmonics and use them to predict the shapes of electron orbitals towards the end of the intro to quantum unit of my university's 2nd year physics class.

@bone0101 4 года назад

"Quasinormal mode" also known as a "Quasimodo" 😁

@marcst3199 4 года назад

a bit offtopic: What are those beautiful backgrounds you use every episode? Could you link them in the discription, as I guess those are pics the NASA made?

@SuperVstech 4 года назад

It appears to be a space time animation... everything is in motion, and many points come and go in the background... Could be an elaborate mixture of many Hubble images I suppose...

@Tromben120 4 года назад

This is the first Space Time video I've actually understood. Thanks, music school!

@DrSpooglemon 4 года назад

13:10 Extreme space time. Could be an industrial electro band.

@sirvongalot 4 года назад

Whoa... “Dark Matter Monkeys”... I totally want one now. (9:57)

@zlatanibrahimovic8329 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cKOtPR0DZdU.html

@colesnapp9124 4 года назад

Matt, I don't understand how two event horizons can merge in a non- infinite timeframe from our point of reference. Wouldn't the two horizons accelerate towards each other until, when very close, appear to slow down, never quite touching?

@sagelink2 4 года назад

Even tho theoretically the density of a black hole is infinite and nothing can escape an event horizon, the one with more mass will eventually suck up the other and gain more mass. Black holes are contradictions themselves but we learn something new every year lol

@RedRocket4000 4 года назад

@@sagelink2 And for fun the total Mass will be less than the combination of the two masses the rest radiated as Gravity Waves which starting at the event horizon I get very confused on why we notice anything considering how slow time is moving in that region.

@nichevl 2 года назад

Yes I'd expect that, though even if that part wasn't slowed much due to time dilation eg some accreted mass outside the EV then after both EVs merge even a little like a dumb-bell then, by extreme time dilation the cores or singularity of Planck neutron star etc would take infinite amount of time from our perspective to merge...

@yorkerold 4 года назад

That's a N I C E spin magnitude.

7 месяцев назад

This is at the core of a fantastic book by physicist and musician Stephon Alexander: The Jazz Of Physics

@jovetj 4 года назад

I can't wait until black hole collision chimes make it into EDM...

@deusexaethera 4 года назад

Rule 34...somehow.

@alicethouard4607 4 года назад

After reading that title, I want to hear a black hole barbershop quartet.

@huehuecoyotl2 4 года назад

Apparently, black holes probably have no hair, so no black hole barbershops.

@alicethouard4607 4 года назад

@@huehuecoyotl2 But they're good at removing hair from other things, so yes black hole barbershops.

@RobertKaucher 4 года назад

But in space, no one can hear you sing...

@goldschadt 4 года назад

never trust a man that don’t drink.

@TenorCantusFirmus 4 года назад

Graduated in Musicology, student of Composition and keen on Astronomy and Astrophisics here, and this video was very exciting for me. Actually, the instrument I'd find most similar in behaviour to a recently merged pair of black holes are either bowed/plucked instruments' bodies (the likes of violin, guitar, etc.) and timpani membranes.

@GameCyborgCh 3 года назад

"Is Mayonaise an instrument?" "No Patrick, Mayonaise is not an instrument." "Black holes aren't instruments either"

@LunaticTheCat 4 года назад

I saw Anton's video on this a couple days ago. Very interesting topic.

@speedball1919 4 года назад

My two favorite things: Music and Black holes

@maxmusterman3371 4 года назад

oh you dont like existing that much? im sorry to hear that

@lotusflower_ 4 года назад

@@maxmusterman3371 lol omg

@martiddy 4 года назад

@@maxmusterman3371 but do we exist? *plays Vsauce music*

@maxmusterman3371 4 года назад

@Martiddy - Sama cogito ergo sum

@Vasharan 4 года назад

That's why I love Muse.

@imi9894 4 года назад

Great video. Please do more!

@alexisrdevitre 4 года назад

Brilliant video man! What’s an astrophysical blackhole and what makes it different from other blackholes, apart from missing one of the properties.

@eval_is_evil 4 года назад

So a lame physics joke : a neutron enters a bar, gets a drink and finds out "It's free of charge" I'll leave now

@jpaulc441 4 года назад

and the bartender said "we don't serve hypothetical faster-than-light particles here" A tachyon walks into a bar...

@marcelo55869 4 года назад

@@jpaulc441 you fool! tachion just entered the room many hours ago

@jamesmnguyen 4 года назад

no, the better punchline would be, the neutron comes out as a proton and electron

@mortimerhasbeengud2834 4 года назад

@@jpaulc441 A Higgs Boson walks into a Church. The priest says, “We don’t allow Higgs Bosons in here. The particle responds by saying: “But without me, how can you have Mass?”

@Rhekon 4 года назад

@@jpaulc441 I see what you already did then.

@elsasswow 4 года назад

Sigma from overwatch : WHAT IS THAT MELODY ????

@frankcrawford416 4 года назад

This is over my head. My thoughts don't merge.

@rifleman2c997 4 года назад

Black hole black hole merger and Gravitational Lensing. Einstein is on a roll.

@jcoronet2000 4 года назад

6:02 that simulation shows positive deflection of space time. so, the areas next to merging black holes effectively produces anti-gravity?

@SuviTuuliAllan 4 года назад

oh like boats?

@zahirkhan778 4 года назад

If you look closely the arrows are pointing down. It is showing amplitude, not positive deflection.

@NimbleBard48 4 года назад

I understand why you would say that but it's not that. It's sort of easy to answer yourself if you imagine falling into the center of gravity of both black holes from the side. Also, you can check the original video description for more details. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-1agm33iEAuo.html

@Soupy_loopy 4 года назад

@@SuviTuuliAllan, LOL; yeah like boats!

@jcoronet2000 4 года назад

@@zahirkhan778 thank you

@SolaceEasy 4 года назад

Hmmm, two similar mergers in the same part of the sky? A lensing event, perhaps? Dark matter interference? Love those rabbit holes!

@zahirkhan778 4 года назад

Could be an echo from the edges of space.

@photinodecay 4 года назад

If there's an additional highly massive object (probably a black hole) between us and the merger, the waves from the merger could have been lensed, yes.