How to Understand the Image of a Black Hole

  • Publisert 9 dager siden

    VeritasiumVeritasium

    Runtime: 9:19

    We have just seen the first image of a black hole, the supermassive black hole in the galaxy M87 with a mass 6.5 billion times that of our sun. But what is that image really showing us?
    This is an awesome paper on the topic by J.P. Luminet:
    Image of a spherical black hole with thin accretion disk
    Astronomy and Astrophysics, vol. 75, no. 1-2, May 1979, p. 228-235
    ve42.co/luminet
    Using my every day intuition I wondered: will we see the "shadow" of the black hole even if we're looking edge on at the accretion disk? The answer is yes because the black hole warps space-time, so even if we wouldn't normally be able to see the back of the accretion disk, we can in this case because its light is bent up and over the black hole. Similarly we can see light from the bottom of the back of the accretion disk because it's bent under the bottom of the black hole. Plus there are additional images from light that does a half turn around the black hole leading to the inner rings.
    What about the black hole "shadow" itself? Well initially I thought it can't be an image of the event horizon because it's so much bigger (2.6 times bigger). But if you trace back the rays, you find that for every point in the shadow, there is a corresponding ray that traces back to the event horizon. So in fact from our one observing location, we see all sides of the event horizon simultaneously! In fact infinitely many of these images, accounting for the virtually infinite number of times a photon can orbit the black hole before falling in. The edge of the shadow is due to the photon sphere - the radius at which light goes around in closed orbits. If a light ray coming in at an oblique angle just skims the photon sphere and then travels on to our telescopes, that is the closest 'impact parameter' possible, and it occurs at sqrt(27)/2*r_s
    Huge thanks to:
    Prof. Geraint Lewis
    University of Sydney ve42.co/gfl
    Like him, I'm hoping (predicting?) we'll see some moving images of black holes tomorrow
    Prof. Rana Adhikari
    Caltech ve42.co/Rana
    Riccardo Antonelli - for excellent images of black holes, simulations and ray-tracing code, check out:
    ve42.co/rantonels
    The Event Horizon Telescope Collaboration
    Check out their resources and get your local link for the livestream here: ve42.co/EHT
    Special thanks to Patreon supporters:
    Donal Botkin, Michael Krugman, Ron Neal, Stan Presolski, Terrance Shepherd, Penward Rhyme
    Filming by Raquel Nuno
    Animation by Maria Raykova

Veritasium
Veritasium

OK, just over an hour to go! This is the link to the Washington DC National Science Foundation livestream: https://ve42.co/NSFstream Click here for links to other live streams (there are several available in different countries): https://ve42.co/EHTstream

8 dager siden
Ian Fenn
Ian Fenn

https://www.youtube.com/watch?v=J4NffTr_GMk&feature=push-u-sub&attr_tag=euopnvSWEjewwAkg%3A6

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Ev3thing
Ev3thing

And you only say that nothing can come out of a black hole because there is no proof that hawking radiation exists?

2 dager siden
Siddhartha Mahajan
Siddhartha Mahajan

The great professor Walter Lewin pointed that in this video you say that we see the light of the black hole while actually we look at radio waves, still he praised this as the best video

3 dager siden
Vincent Pellemans
Vincent Pellemans

Your prediction in the 20 first seconds was actually not too far.

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Lawrence L.
Lawrence L.

I could care less about Space...I'm only concerned when an asteroid will hit earth. Everything about Space sounds like science fiction to me, and another alien language.

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Sourabh Das
Sourabh Das

So if the image of the black hole is face-on to us rather than edge-on, shouldn't the relativistic effect disappear, since no part of the accretion disk is traveling at relativistic speeds towards or away from us?

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Inkvisitio
Inkvisitio

Black holes hurt my brain. I'm just going to look at funny cats instead. Do you like cats?

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pwrkiter
pwrkiter

Thanks for such a brilliantly clear and easy to understand, visual description of a black hole. Great work!

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Lost Transient
Lost Transient

Thanks. Great video. Referred by Joe Scott: Answers With Joe.

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Lost Transient
Lost Transient

3:30 Oops. I think something broke inside my brain. Damnit!

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Kumquat Lord
Kumquat Lord

So, black holes are basically Hotel California

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marcelosimas1972
marcelosimas1972

Excellent representation! Sent here by Joe, from Answers with Joe.

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Incredible World
Incredible World

Great video! Persevere with doing nice content and you are going to get bigger quickly! Subscribe to our channel and also we'll subscribe back!

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Parveen Kumar
Parveen Kumar

How a radiotelescope captured black hole and light around it ?

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Richard Oberle
Richard Oberle

I am so confused....

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Salok Singh
Salok Singh

I was sleepy when i clicked on this link, and man, thank you for this. This might keep me up the whole night. The best explanation anyone could ask for. A-ma-zing. Thank you!

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Steven Gulie
Steven Gulie

Outstanding! Best description I’ve heard, by far.

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Steven Gulie
Steven Gulie

Schroedinger, Schwarzschild...

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Steven Gulie
Steven Gulie

I guess I should add my education level for reference. I don’t have any talent for physics so it hurts my brain to do the math, and once you get to the Shroeinger equation I can’t do the math period, but I’ve studied physics enough to follow a lot of the math, if you talk me through it slowly. I understand the Shwartzchile radius well, and I “get” gravitational lensing, though not the actual spacetime curvature math (don’t even recognize many of the symbols). And from my point of view this was spectacularly clear and didn’t raise any new questions. Thanks again.

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Andrzej
Andrzej

So far the most informative video about this subject that I found so far.

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scubadope
scubadope

If a father and his son fall into a black hole, the father can escape if he goes to get ice cream.

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Andrew Williams
Andrew Williams

I like turtles

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sywaddr11
sywaddr11

Warp it is, isn't that also be surrounded?

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bear adams
bear adams

If the speed of light is a universal constant like in E=MC2 yet gravity affects it isn't gravity more of a constant than light?

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Berke Beenhouwer
Berke Beenhouwer

Well, needless to say your drawing was pretty much spot on :)

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Philippe Santini
Philippe Santini

Thx for helping me understand. Your visual demonstration really help me "wrap my head around it"! ;)

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Chris Genly
Chris Genly

Derek, that was fantastic. You are an excellent teacher!

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Bas Finnis
Bas Finnis

No pun intended obviously!

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Ben Houghton
Ben Houghton

This is the the best explanation about the image of blackholes i really enjoyed this one, great video

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Drake Khahili
Drake Khahili

4:20

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MrTrekFanDan
MrTrekFanDan

May the Schwarz be with you. But seriously,  at what Schwarzchild radius distance does spagettification begin?

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Jacob Lloyd
Jacob Lloyd

My head hurts !!!

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Man-Ung Yi
Man-Ung Yi

Thank you for great great explanation!!

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John Collado
John Collado

So cool!

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Ashutosh Chakravarty
Ashutosh Chakravarty

You're more than accurate....amazing video, great explanation for a layman.

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Tazmeen Fatima
Tazmeen Fatima

Thank you so much for making this video..😍💕 it was literally awesome... bt i have one question..we have pictured d blackhole of another galaxy.. . why we haven't pictured our own galaxy's black hole .. (Sagittarius A*) ..yet.?

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Senpai
Senpai

Why is the disk flat?

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Roy Porter
Roy Porter

Can 2 atoms occupy the same at the same time? They can if separated by time! Due to the slowing and almost stopping of time due to a black hole, the curvature of time is extremely excessive, causing matter to be buffered in time, stacking up on itself only separated by the curvature of time. Hence more matter can seemingly occupy the same space. (Infinite time curvature equals infinite density, like before the big bang?) time-factor-theory.

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Kimberly Arceneaux
Kimberly Arceneaux

“If you have any questions “..😂🙋‍♀️...Can you create all of this fabulous info into an animation video? #prettyplease

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M Yare
M Yare

What happeneds inside the black hole

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Kimberly Arceneaux
Kimberly Arceneaux

Love ❤️

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Swadhin
Swadhin

I want to know what's inside a blackhole.

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Safia Yehia
Safia Yehia

professor walter lewin talked about this video , Derek and said how amazing your explanation is .. you deserve it

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Luka Hall
Luka Hall

“The gravity of the situation”......HA!

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Chris Bullock
Chris Bullock

question why is it we do not see the jets or the point of where the jets come out of the black hole? Do not tell me it is the size since that is a non-argument. We would see the points of where it comes out. I also know those jets are many light years across so really huge and the image is only a few arcseconds across. Either way, we should see the point where those jets come out. Sure the image is fuzzy so it could be we do not have powerful enough telescopes to see that detail but I have to truly wonder seeing scientist have had a baseline that was a little incorrect, to begin with and just carries over, since the computer software that created this image from the radio image had to be based off something

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bittechslow
bittechslow

M87 not milky way.

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Tamal Mahato
Tamal Mahato

Wow your prediction matches the recent released image

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Hitesh Gupta
Hitesh Gupta

Bro please make one video on antimatter as well

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Justin Butterworth
Justin Butterworth

Great Video. I learnt a lot from this. Thx

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masterfan0
masterfan0

Isn't the closest black hole something like few million light years away from us? If so, how come we were managed to snap a photo of it?

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Prakash Kamath
Prakash Kamath

Excellent explanation.... God bless you

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Omkar Deole
Omkar Deole

Awesome. Thanks a ton for explaining in simplest possible way 🙏

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Abhirup Bhattacharyya
Abhirup Bhattacharyya

is there any red-shifting of light from the accretion disc???? please answer

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Abhirup Bhattacharyya
Abhirup Bhattacharyya

Crazy AWESOME ILLUSTRATION THROUGH PROPS. FINALLY, I UNDERSTAND COMPLETELY WHY BLACK HOLES' PHYSICAL MODELS PREDICTED BY KIP THORNE FOR INTERSTELLAR LOOK THE WAY IT DID!!!! THIS VIDEO IS A GEM AND BY FAR MY FAVOURITE OF YOUR VIDEOS!!! THANK YOU SO SO MUCH FOR EXPLAINING IT AND ILLUSTRATING IT IN SUCH A SIMPLE, ELEGANT AND BEAUTIFUL WAY!!!! WOOOW! Completely 'sucked in' as opposed to being blown away ...hehe!

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SHOBHA SINHA
SHOBHA SINHA

The best explaination of structure of black hole ever seen 👍👍👍

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Juanse Herrera
Juanse Herrera

He speaks so fast, I need subtitles

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AKASH. SIVAH.
AKASH. SIVAH.

So we can't see the front part of the disk in the image because it's so thin and far away?

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AKASH. SIVAH.
AKASH. SIVAH.

If something like this has been an obsession for only a week, I can't imagine what else he does 😂

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TESLA SCIENCE
TESLA SCIENCE

To watch the picture of black hole . Click here https://saveit.co.in/r6OZfcD

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Bob van den Heuvel
Bob van den Heuvel

For someone who has to visualize things first in order to understand them, this was extremely helpfull! Thanks a lot, I'm sure you had fun making the sophisticated model! :) :):)

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wretepstube
wretepstube

Black Hole or Plasmoid? >>> https://www.youtube.com/watch?v=J4NffTr_GMk

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Akshay Mali
Akshay Mali

Why did they not include Hubble Telescope in their project ? As it's already in space and would've helped capturing a more clear picture of a Black Hole by avoiding dust particles and gasses of the earth which are absent in space !

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Obou Moura
Obou Moura

its was not a black hole

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Azriel Jale
Azriel Jale

Thanks to Interstellar. I already know how black hole looks.

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dejaeviz
dejaeviz

shhhh .... stop it. Its a Plasmoid ...... Torus shaped ... and we're looking at the donut hole ....

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Incredible World
Incredible World

High-quality video! Always keep producing excellent content and you can grow quickly! Subscribe to our channel and also we shall subscribe to your channel!

Dag siden
Bill Noller
Bill Noller

Well......I feel a lot dumber. Lol

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The Holistic Esthetician
The Holistic Esthetician

That was a fabulous visual!

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Chris W
Chris W

It's FAKE JAKE

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Gebre Yesus
Gebre Yesus

I like this video

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Marios Kateroglou
Marios Kateroglou

what about an image of a BuTtHoLe

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Famous TV
Famous TV

Fine video! Keep on making excellent content and you are going to grow rapidly! Subscribe to our channel then we can subscribe back!

Dag siden
Magister Mortran
Magister Mortran

How can light or matter ever reach the event horizon or even cross it? Time comes to a standstill at the event horizon, so all the time in the universe would not be sufficient for anything to reach the event horizon. The point of no return can never be reached, if we believe General Relativity.

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ColossalSqvid
ColossalSqvid

damn, that was cool

Dag siden
Os / Hs
Os / Hs

Im here to see whats the story behind all these memes

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Jacob Wattenphul
Jacob Wattenphul

I'm not a scientist or anything close, but I'm honestly interested in knowing if this a black hole. I've also stumbled across the the idea that Plasmoids are at the center of these anomalies. I value your opinion and would love to see you do a video comparing the two theories of black holes and plasmoids being the cause of these high energy phenomena. I found the idea of Plasmoids in this video: https://www.youtube.com/watch?v=J4NffTr_GMk

Dag siden
Abhishek Das
Abhishek Das

Woah Walter Lewin gave you a shout out :) You must be real happy .. loved how you explained everything so simply so everyone could understand. Great work!

Dag siden
animal16365
animal16365

But wouldn't the accretion disk fully envelope the black hole instead of being like a ring around it?? I ask this due to the black hole pulling in material from all around itself. And also if light has no mass. Then how can the gravitational pull of the black hole bend the lights photons??

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Karthik Rambhatla
Karthik Rambhatla

5:57 well it's black 🤣🤣

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Joshua Diven
Joshua Diven

Finally someone explained it and I understood

Dag siden
Windyworm
Windyworm

So first estimate the size of the event horizon, then multiply by 2.6? Who can confirm the size of the event horizon?

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Borrie
Borrie

what a bunch of crap

Dag siden
Indah Lockit Official
Indah Lockit Official

I to indonesia

Dag siden
Nanda Kishore
Nanda Kishore

Hey aren't there any obstacles between us and the m87 blackhole

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Galileo
Galileo

the black hole they are looking at is messier 87* not saggittarius a*

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shubhankar tyagi
shubhankar tyagi

Hello Veritasium....that is an exceptional explanation of the picture I just have one question. Why is the acretion disk a planar disk and not a sphere? Since black hole is in the process of ingesting everything around it why would it only be in a single plane? Moreover if it was a sphere we woild have never been able to see the black hole as it would always be shrouded in that sphere isn't it?

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pastuh
pastuh

False information. You don't know if you can or can't go back from Black Hole.

Dag siden
Agimaso Schandir
Agimaso Schandir

Why not? Do you have something that says otherwise?

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XYZ No names
XYZ No names

Just make sure we don't let flat earthers anywhere near this concept.....pleeeeeease!

Dag siden
Darryl Arrington
Darryl Arrington

He's discussing light that just grazes the 2.6 Schwartschild radius, and shows how it loops around. Wouldn't the black hole then work like a gravity assist to photons? And since photons are already moving at the speed of light, getting a gravity assist... well, fill in the thought there.

Dag siden
sudharsun balu
sudharsun balu

Very good explanation.👍🏻

Dag siden
Amanda Putri
Amanda Putri

Will the Earth goes to the Black Hole??

Dag siden
orton dsouza
orton dsouza

Wondering if the light we see from the photon sphere would be condensed and if this light is expanded would we be able to see our past(if we found a way to make sense of the light) ?

Dag siden
Khois K
Khois K

Watch Interstellar 2014 guys you will understand full😂

Dag siden
iowyyn
iowyyn

This was Amazing! Such a fantastic presentation! Thanks Derek.

Dag siden
Cathrin Gustafsson
Cathrin Gustafsson

Nope. A black hole is in some stars. As Sirius. https://youtu.be/lmBh-WZzjIg 1,20 s.

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Waqar Malik
Waqar Malik

Black Hole - A new ERA of Space Research https://youtu.be/P0-juyDTgUQ

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Paul Hatzigiannis
Paul Hatzigiannis

Spot on!

Dag siden
Akshay Mahajan
Akshay Mahajan

Can we make a small black holes on earth ....?

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Salafi Adnan
Salafi Adnan

Can u explain about singularity ..!?

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Yasir Arfat
Yasir Arfat

Excellent video sir... Sir i have a doubt the image we git of black hole is 55 million light years away from us.. Then when the light have been reflected after grazing event horizon... Have it reflected 55 million light years ago from today????

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cccpredarmy
cccpredarmy

yes. we are looking at the past.

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Sam Hall
Sam Hall

Dude you are f****** ridiculous. Why put so much faith in something you can't see? I mean I get it I used to be a science nerd to but after realizing You're simply a false prophet in the modern religion called scientism I can see just how ridiculous you sound. Now I don't mean that to be disparaging of you, I'm not talking s***. It's just that I can see your energy and there are moments in this video where I can see you smile at the absurdity. have you indoctrinating peanut crunching crowd in this (let's call it what it is) this religion.

Dag siden
Walter Tegischer-Painsi
Walter Tegischer-Painsi

1.) This is not a true Image like common understanding, this is a artificial reconstruction due to missing data. 2.) the “image” looks like a torus. Due to the situation that 99,9% of all matter in the galaxy is plasma, it really looks like a so called “plasma focus” or “Plasmoid” 3.) the jets: theoretical SL’s doesn’t emit something like jets seen in M87. A plamafocus is a natural source of a bidirectional jet. 4.) SL’s are a theoretical product operating with infinity. This is physically complete nonsense. 5) a Plasmafokus is electromagnetic extremely active and the electromagnetic force is much, much higher than gravity. You can simulate this and put gravity to the Modell or not and you will see it doesn’t matter 😁

Dag siden
Arnoud Witt
Arnoud Witt

What about a different explanation of what is observed? https://youtu.be/J4NffTr_GMk

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M. J.
M. J.

Easy .....just bend over....

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