How to Understand the Black Hole Image

  • Δημοσιεύτηκε στις Πριν χρόνο

    VeritasiumVeritasium

    διάρκεια: 09:18

    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

Πριν χρόνο
Randal Turner
Randal Turner

I witnessed a black hole close up. what you say makes a lot of sense to explain what I witnessed, at the time there were no large stars being sucked into the black hole just a small planet but as the usv approached I noticed these flickers of light about the distance away from the black hole center as you display here. the light flickers around it like slivers of light. Hard to explain what I was seeing but that it what I would describe them as along with an odd haze and blur. Keeping in mind this must have been from star light being the black hole as it was not sucking in any large stars at the time which is why they chose to send the usv to view it devour this small planet.

Πριν 6 ημέρες
CarnageChaos 895
CarnageChaos 895

You were right

Πριν 8 ημέρες
glidercoach
glidercoach

Thunderf00t says the image is a fraud.

Πριν 16 ημέρες
satish kumar
satish kumar

I don't understand ur technique

Πριν μήνα
Guitar Ocd
Guitar Ocd

That's why I did bad in school. About 5 minutes into this I started thinking about girls. So I still have no idea what a black hole is.

Πριν 2 μήνες
Jonas
Jonas

I'm so confused and I don't understand it lmao

Πριν 5 ώρες
SangeetART
SangeetART

excellent explanation..really loved it...

Πριν 11 ώρες
METO U
METO U

Plasmoids...not black holes

Πριν ημέρα
ps techy
ps techy

Your are the best

Πριν ημέρα
Lynn
Lynn

Finally I've understood how the picture of the Interstellar blackhole was created! *fireworks setting off in my braincells*

Πριν 2 ημέρες
Benoît Marcel
Benoît Marcel

I finaly understand how the accretion disc works now, fantastic thank you man !

Πριν 2 ημέρες
Ghost
Ghost

Didn't understoos anything but still enjoyed😂🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣😅😅😅😅😅😅😅😅😅😅😅

Πριν 2 ημέρες
Drafty Green
Drafty Green

THAT WAS WEIRDLY ACCURATE HOLY CRAP

Πριν 3 ημέρες
As It is
As It is

Imagine you escape a black hole just to end up hitting a telescope.

Πριν 3 ημέρες
Ray Cayetano
Ray Cayetano

0:28 nice pun no need to point out right? 😉

Πριν 4 ημέρες
Pavan Gaonkar
Pavan Gaonkar

excellent

Πριν 4 ημέρες
DJ Official Music #1
DJ Official Music #1

spinnig black hole super excite my privates

Πριν 4 ημέρες
DJ Official Music #1
DJ Official Music #1

ejoy my milky wat

Πριν 4 ημέρες
DJ Official Music #1
DJ Official Music #1

my black hole been explorer by over 9000 penuses

Πριν 4 ημέρες
Johannes Wöhler
Johannes Wöhler

The higher the degree of my 'amazement' to science and all that stuff is equal to the degree of 'dumbness' about the maths behind it. Because honestly, it's all numbers. I can't solve anything more than the basics, lest anyone put Greek or Latin symbols and alphabet in those numbers plus those other shits just like Jessica Chastain did in interstellar or any of those colleges greenboards with elvish scriptures goin on lmao. I think I'll fit for a test organism than the one testing it, that's how dumb I am. But man, I love science!!!!

Πριν 4 ημέρες
Shaivya Dhall
Shaivya Dhall

Hello sir, could you someday please explain the structure of the black hole, please. And by the way thanks for every video which makes me more inquisitive day by day. You really are my role model and I look up to you !

Πριν 4 ημέρες
Sitthiya Lertwiram
Sitthiya Lertwiram

0:07 Please don't use side view camera. Please keep Dr. Derek talk to us, not someone else. Please god, not this ugly sneaky view of him in Veritasium's video.

Πριν 5 ημέρες
david wyn-jones
david wyn-jones

so...how does/will this improve the bald psychotic apes lives?...…...it wont.....so please if you scientific "types" need a useful purpose.....try something "useful" to mankind.....like feeding millions of the imbeciles on...…………......EARTH !

Πριν 8 ημέρες
Narendar Dubey
Narendar Dubey

Very good

Πριν 8 ημέρες
놈펜
놈펜

이동영상 대신 보내는 보봐르남 이라는 새끼는 토종일보놈!

Πριν 9 ημέρες
Steve
Steve

So we don't actually know what black holes actually are still

Πριν 9 ημέρες
ndy1211
ndy1211

I'm such a noob, I have to download it so i can watch it repeatedly in order to understand it

Πριν 10 ημέρες
Jessebob Æ
Jessebob Æ

This is an outstanding video with (for me) a great explanation of what's happening. Thank you for all your work.

Πριν 10 ημέρες
pforce9
pforce9

Your black hole looks like one of those black balls you spread out in that swimming pool.

Πριν 11 ημέρες
Longtail 92
Longtail 92

인제야 인터스텔라가 좀 이해가 가는군~^^

Πριν 12 ημέρες
Rebelaqua
Rebelaqua

OMFG!

Πριν 12 ημέρες
Lucas man
Lucas man

What?

Πριν 11 ημέρες
Ryan Schroer
Ryan Schroer

C'mon Derek, stop saying Sagittarius A* and our galaxy.. I know you know it was Messier 87

Πριν 12 ημέρες
willy Wonka
willy Wonka

So a black hole is actually a black sphere and the event horizon is the surface of the black sphere. But it is not actually a sphere it’s more of a spherical void where no light can exit because of gravity produced by the singularity at the centre of the spherical void.

Πριν 12 ημέρες
fuckboi69
fuckboi69

haha what if he was just wrong

Πριν 13 ημέρες
Dayman Studios LTD
Dayman Studios LTD

Black holes really don't exist mate, please stop pushing pseudo-science. You're doing more harm than good. The more people spend billions looking for something that can be explained many other ways, the more we waste money on branches of science that don't benefit anyone.

Πριν 13 ημέρες
awinste
awinste

If you were one of the 2,600 people who downvoted (at the time of this comment) I’d really like to know why.

Πριν 13 ημέρες
Nick Scavok
Nick Scavok

thanks !

Πριν 14 ημέρες
Elio Camey
Elio Camey

9 minutes laters...I feel 10x smarter! awesome video and explanation! Science is awesome!

Πριν 15 ημέρες
Viradeus
Viradeus

well that makes little to no sense If anybody else doesn't understand, here is one link: https://www.vox.com/science-and-health/2019/4/11/18306110/first-image-black-hole-eht-event-horizon-singularity It explains the picture better then Veritasium

Πριν 15 ημέρες
Cpt. Battlecock
Cpt. Battlecock

I have a question. Umm wtf

Πριν 15 ημέρες
x3AGamer
x3AGamer

0:27 pun intended or not intended?

Πριν 15 ημέρες
Paulo
Paulo

8:30 so we could notice the direction in wich the accretion disk is spinning by the diference between "clarity" in each side?

Πριν 15 ημέρες
Rescue Rabbit
Rescue Rabbit

Why is black hole?

Πριν 16 ημέρες
Lucas man
Lucas man

Oh right and something called singularity

Πριν 11 ημέρες
Lucas man
Lucas man

A hole in space and time itself, it has infinite density it is created by dying supermassive stars that's basic stuff you need to know about the black hole

Πριν 11 ημέρες
Nevei •
Nevei •

Yes

Πριν 16 ημέρες
Daniel D.
Daniel D.

Wouldn't these values change depending on how big the mass and size of the black hole?

Πριν 16 ημέρες
OMGLegendary 1
OMGLegendary 1

What you are seeing is the event horizon while the core is made up of singularity

Πριν 16 ημέρες
White Fox
White Fox

Jesus I haven't realized that this is over a year now. I still believe that this is one of the best accomplishments we had ever made.

Πριν 16 ημέρες
Oysters Oysters
Oysters Oysters

Спасибо за прекрасно снятое видео солнечного затмения 21 июня 2020.

Πριν 16 ημέρες
João Batista Farias Jr
João Batista Farias Jr

Any point we look we will see the same image?

Πριν 16 ημέρες
Max Blade
Max Blade

pfft they still can not prove this at all.. yawn

Πριν 16 ημέρες
Lucas man
Lucas man

Do your research before saying something idiot

Πριν 11 ημέρες
Lucas man
Lucas man

They have already proven it in 10 April 2019

Πριν 11 ημέρες
Mave Rick
Mave Rick

AMAZING explanation! If you're a teacher or a professor, then your students are very very lucky!!!

Πριν 16 ημέρες
iStudLion
iStudLion

Wait... the accuracy...

Πριν 16 ημέρες
Saim Talib
Saim Talib

Your name please..

Πριν 17 ημέρες
Anthony Wolf
Anthony Wolf

Saw my first picture of a black hole thanks to Christopher Nolan

Πριν 17 ημέρες
RiksaBoi
RiksaBoi

Not a black hole, a black ball

Πριν 17 ημέρες
Lucas man
Lucas man

He is using the ball to demonstrate and the hole looks like a ball because of its density and gravitational pull

Πριν 11 ημέρες
jason dinawanao
jason dinawanao

what is the equal amount of swajshushehsbchild radius in km?

Πριν 17 ημέρες
Thomas Reiber
Thomas Reiber

Nice gravity pun

Πριν 17 ημέρες
천애백수결혼할수있을까
천애백수결혼할수있을까

봐도 모르겠네 ㅋㅋ

Πριν 17 ημέρες
Richard Samuelson
Richard Samuelson

What purely-theoretical speed would be required to escape a black hole? Two times the speed of light? Five?

Πριν 17 ημέρες
Ayush Sharma
Ayush Sharma

Going outside a event horizon is the equivalent of going back in time, anything faster than light can do that, since time dilation predicts negative passage of time for v > c.

Πριν 16 ημέρες
YEET
YEET

It’s insane how he made this prediction before it even happened. The description of the photo is nearly perfect to what the actual photo of a black whole looks like

Πριν 18 ημέρες
Mgl 1206
Mgl 1206

Viradeus it’s not always the teachers fault when a student fails to understand.

Πριν 2 ημέρες
Mišo ElEven
Mišo ElEven

@Viradeus Not everyone was fortunate enough...I had to watch 2 times but I got it.

Πριν 12 ημέρες
Viradeus
Viradeus

he certainly predicted it, but really couldn't teach it well. I understood nothing

Πριν 15 ημέρες
VOIDMusic
VOIDMusic

Just FYI, there have been loads and loads of computer simulations predicting what the image would look like even before this video was out. Derek was certainly not the first one to make this 'prediction'.

Πριν 15 ημέρες
فاء بن ألف'
فاء بن ألف'

But aren’t we technically seeing a really old image of the black hole since it takes it light years to arrive to us?

Πριν 18 ημέρες
Lünkel
Lünkel

That's totally correct. Looking farther into space always means looking back in time.

Πριν 15 ημέρες
Lünkel
Lünkel

@Unknownz 123 I think you meant "unit of distance" and yes, obviously everybody knows that. But a light year is called a lightyear because it takes light 1 year to travel that distance. So when you look at something 1 lightyear away, you see it as it was 1 year ago. That is what they were asking about.

Πριν 15 ημέρες
CrumpleV
CrumpleV

Vsauce 4

Πριν 18 ημέρες
Kinnari Bhalerao
Kinnari Bhalerao

This is honestly the best explanations i have watched till now!!!

Πριν 18 ημέρες
ROKESH KUMAR G
ROKESH KUMAR G

What happens if we fell into blackhole!?

Πριν 18 ημέρες
Lord ZombieBoy
Lord ZombieBoy

That reminds me of 4D

Πριν 18 ημέρες
Susie Henderson
Susie Henderson

Very informative 😃

Πριν 18 ημέρες
Weed Weekly
Weed Weekly

AH THATS WHAT HE DID WITH THE SHADE BALLS

Πριν 18 ημέρες
Aiman Razak
Aiman Razak

He sent me one after i paid 1$ on his patreon lol

Πριν 6 ημέρες
YMC-DAB420
YMC-DAB420

He did say what he was gonna do with all of them

Πριν 6 ημέρες
the gadgets store
the gadgets store

Sorry but as a Indian scientist said black hole doesn't exist why u all don't understand his theory u don't like Indians to be on tol

Πριν 18 ημέρες
JD
JD

We dont care if hes indian or not, but we an image of a black hole

Πριν 18 ημέρες
MALEK001 001
MALEK001 001

We already have images of a black hole, what do you mean?

Πριν 18 ημέρες
K_NERVe
K_NERVe

"Gravity? Who gives a crap about gravity?" - Scout, 2009 (colourised)

Πριν 18 ημέρες
Vj Sam
Vj Sam

May I know did you explained to Christopher Nolan..?!

Πριν 19 ημέρες
BeyerT1
BeyerT1

A year and a half later, confirmed that black holes are now 3D globe-like structures that we believed, but in fact 2D.

Πριν 19 ημέρες
Manoj Jain
Manoj Jain

Just one question... If the universe is expanding..... What is it expanding into???

Πριν 19 ημέρες
MALEK001 001
MALEK001 001

We don't know. It might be expanding into "nothingness", it might be expanding into another universe, it might be expanding on itself.

Πριν 18 ημέρες
SUPER CREATIONS
SUPER CREATIONS

This Is the most beautiful 💗💗 explanation of the image of black hole ..... Loved it sir 👌👍

Πριν 19 ημέρες
Afroja Noon
Afroja Noon

It broke my mind, I don't even know what I don't know with all those light bending bending my mind. You did a GOOD job explaining it, but it's me who is not capable of grasping the reality with my mind.

Πριν 19 ημέρες
Graeme Gunn
Graeme Gunn

5:50 mind blown

Πριν 19 ημέρες
Graeme Gunn
Graeme Gunn

Photon Sphere Sounds like a band name!

Πριν 19 ημέρες
Juan Rodriguez
Juan Rodriguez

Thank you, great explanation.

Πριν 20 ημέρες
Mehdi K
Mehdi K

This is your best video ever 😊

Πριν 20 ημέρες
AMAZONAS279
AMAZONAS279

Now that we have the basics of the black hole, can you explain the hologram theory where we might be living in the “Matrix”? What happens to an observer who gets close to the event horizon? Thanks!

Πριν 20 ημέρες
LIVESH
LIVESH

there is a major error here bt i lack the articulation skill to explain it. i will try. the black hole we see in interstellar an what this video claims we would see when we are up close is wrong. we will always only see the light around the black hole . firstly the accretion disc is just a 2d representation of the actual thing. in real life photons travel all direction and unlike and object the light has to move towards us in order for us to see it. so any light that is apparently passing by in between the black hole and us will not be visible in the first place because non of those light rays are heading towards us. i mean y'all need to firstly understand that light itself is bending and going around the black hole. its almost theoretical. if light can be bend we will never be able visually see it in real life. we will only be able to perceive those rays that comes straight to us after what ever bending occurs to the light. photons are really an interesting thing . similarly the black hole is super interesting also. it is 3d and not 2d yet because of the way light bends around it you can only always see a ring around it as a 2d image and never see the accretion disc. firstly it is not a disc. it is 3d coming from all possible angles bt only those light that end up directing itself to us can be seen by us . and only objects in that ring or circle as i should say, could be seen.

Πριν 20 ημέρες
LIVESH
LIVESH

and yes the only way to prove if light bends is to know where the source of the light is coming in the first place. like a school experiment we use a tube and then curve it or bend it and realize that we never end up seeing the source of light anymore but only those light that are reflecting from the tube . unless you put a mirror in the blind spot which will then allow the light rays to reflect perfectly but flipped in order for use to see the light source. in space it is said that some stars that we are seeing are actually not exactly where we see it is but slightly offtrack. but we will never know this without knowing the exact location of the source of the light and the fact that the rays are coming from a place so far. thats why the black hole is the only prove that light can indeed bend in time space because the gravitational pull is so strong that even light start to get pulled in. so once again u can only see whats around the black hole

Πριν 20 ημέρες
Garry Reyom
Garry Reyom

Wait, so Interstellar was accurate?

Πριν 20 ημέρες
Lucas man
Lucas man

Yes

Πριν 11 ημέρες
Doctor Algy
Doctor Algy

Yes

Πριν 17 ημέρες
Joseph Phillips
Joseph Phillips

I love science ♥️

Πριν 20 ημέρες
Ahmet Sayıcı
Ahmet Sayıcı

Perfect explanation. I admire it.

Πριν 21 ημέρα
NST Kr3w
NST Kr3w

wait did he just say light has no mass?? didnt einstein like say something about that XD

Πριν 21 ημέρα
Lünkel
Lünkel

Like that light has no rest mass otherwise it wouldn't be able to move at the speed of light?

Πριν 15 ημέρες

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