+Amir Hussain Think that one through again mate. I thought this channel was focussed on new new instruments/findings/ideas and when one sees an attempt at channelling Sagan with old ideas is very disappointing and I can imagine someone disliking it in disappointment, among a whole host of other reasons,some of which might be to do with youtube's algorithms (and therefore google's as well). So, it is best to test your hypothesis to yourself before opening your mouth as wide as it will go and inserting both feet.
+neddy laddy Perhaps Sept 2015 is too old a finding for you? I agree LIGO is not new but the results certainly are, they were only announced last Feb. The dislike percentage is roughly 1% of the total views, so this is consistent with the other 290 some videos I've posted (with no apparent correlation to my attempts to channel Sagan). The only exception to that percentage was a very old attempt at a joke on intelligent design. Lesson in staying away from humor.
Deep Astronomy cheers A mild dissatisfaction with the video was being used as a"for instance" to illustrate my point, that the original poster had jumped in early with a (very) poor attempt at humour without considering whether there were ANY non-religious reasons to dislike it. I didn't push he "thumbs down" button by the way.
I'm doing an internship with NASA this summer, and we had a talk on gravitational waves, and I asked a question regarding the formation of gravitational waves. Everything causes gravitational waves I was told by the lecturer. The only way we get detectable gravitational waves is when two massive objects moving close to the speed of light collide into each other.
+john snow That was not exactly what was meant, though. It's just that, because flat space has three dimensions, curved space needs more than three dimensions, so in order to visualize curved space, you have to imagine our 3D-Universe embedded in another Universe. But that's just to visualize. Black holes are inside our Universe, but reality needs more than the conventional three dimensions to be properly described.
I've watched a few of your vids. in a row. The one thing I have noticed, apart from their general excellence, is the audio quality. It changes with every video I have watched. Do you get lots of free microphones? :-D
will you collabrate with spacerip anytime in the future? maybe you would produce better content together... both of the channels are best channels for astronomy videos...
Q: Did black holes necessarily come from exploding heavy or massive stars? What about stars that rotate around a common centre with no or little mass. Can such stars collide and change into a supernova or a black hole? And there are planets around dwarfstars that can become trillions of years? If such planets collect more and more dust from space, why can't they change into black holes?
jake W As a (very) amateur astronomer, who has been studying black holes for the last decade, or so, I would like to say potentially yes, given enough time, observations, and sensitive enough instrumentation... but, realistically, I have to say no ... As we both know, a gravitational singularity at the heart of even a stellar-mass black hole is space-time curved infinitely in a infinitely small space; the way I try and think of a singularity is if the gravitational warping of space-time around a star like VY Canius (or bigger ... ) is squeezed into a space no bigger than a Planck Length... That's not only beyond the imagination, but beyond what can be imagined... at this point in time, we simply don't have the mathematics, or, indeed, the physics, to describe such a place, and I doubt very much if the problem of what lies within a singularity is solved within our lifetimes...
+CJ Davis The time scales are very long, but it can happen. As galaxies merge and evolve their black holes also grow and as the models run their course, over time, all that's left is the black hole. Of course, we're talking extremely long timescales, much longer than the current age of the universe. And as many commenting on this video seem obsessed to point out, due to evaporation from Hawking radiation, they too will eventually die.
They usually come from NASA, ESA or ESO because they are govt organizations that put their work out in the public domain. Very occasionally I will pay an artist to make a graphic, but that happens rarely. Thanks for watching.
Can someone explain the upwards motion of space shortly before the collision? By my understanding of what's going on, it seems like the animation is suggesting gravity pushes you away.
+Matt Cooke Like water splashing up when you drop something on the surface, a displacement of mass will cause space-time to shift. From what I understand, it seems like mass was not conserved when the two black holes merged. Because the new total mass is less than the sum of the original two components, the shed mass manifested as a gravitational wave, as the sudden loss in mass (hence gravity) caused space-time to ripple. Gravity doesn't push things away, but it does stretch space-time. If something can be stretched, it can also be compressed. A sudden loss of mass will cause oscillations as space-time tries to return to equilibrium like a spring.
No, they just pack more and more matter into that infinitesimal point becoming ever larger until they (hypothetically) fizzle out as Hawking radiation long after the heat death of the universe.
***** Well, it's not really like that, it's a collaboration from a lot of already existing telescopes around the globe. You can read more here: www.bbc.com/news/science-environment-35258378
Considenring that in the mid-point between black holes collision the resulting gravity must be zero (both sides cancelling each other out), it is possible for light to escape. i will say yes (give me my Nobel prize) ;)
Yes. I hate it when they say "there is no known way to escape the event horizon" Obviously, there are. Like, there aren't any kids watching this on UA-cam, be as scientific as you want!
+Dexter Peterson 'Obviously there are' Really? Obviously? Hawking Radiation and Quantum entanglement are ways to escape a black hole? Happens every day, does it? I'm going to start a new video series called, 'Shit UA-cam Commenters Say' I want to hear the obvious way to escape a black hole using entanglement and Hawking radiation. Do you have any antiparticles handy?
+Lucid Moses Both are Theoretical. Let us know when you've proven either of them. Till then, can a theory escape the event horizon of a black hole? Don't worry, it's rhetoric.
+Dexter Peterson ob·vi·ous·lyˈäbvēəslē/adverbadverb: obviouslyin a way that is easily perceived or understood; clearly. You can leave the final copy of your report on all the "Obvious" ways to escape the event horizon of a black hole on my desk by the end of the week. Or in the youtube comments below. I'll expect valid peer reviewed sources on all claims. ~thanks.
+Deep Astronomy Hey Tony. I wasn't referring to "pop science" channels where the host is chewing bubble gum. Thou I do watch PBS Space Time and I would say they are an entertainment channel. They do seem credible. Also, I'm not referring to some wacky, crazy theory. It's my understanding that the current leading theory of the universes end is heat death. That theory requires the evaporation of black holes. So, in what ever form... Somethings getting out. It's also my understanding that the uncertainty principle also allows things to occasionally get outside the event horizon. But, I'm not claiming to be an expert, just interested. So, if you can make a video disproving these I'd be interested in seeing it.
Imprecise and probably inaccurate-for example public lecturers claim that our time fully stops at the Schwarzschild radius, but if true then the holes would halt collision at radius-contact and continue radiating gravity waves; Also, the mass loss of the pair furthermore implicates another type of 'evaporation' where much of a hole mass is outside, its hole....
+cyanidejunkie117 What exactly would density of space time even be? You could measure (or at least calculate) its curvature though if that is something like you were thinking of.
+Christian Matthe Well, in order for waves to propagate, they must move through a medium, shouldn't that medium have a measurable density? I don't know, that's why I asked.
By density do you mean a measure of how much a wave is bent/broken when it changes medium. Analogous to glass breaking light (as ina prism). This would be its index of refraction for Optics (not the mass density of the material). For space time the closest thing to that would probably be curvature once more.
+cyanidejunkie117 sound waves and pressure waves in water, waves through the Earth (Earthquakes), etc, require a medium. Electromagnetic waves (light, X-Rays, Radio, etc.) are fundamentally different and do not require a medium. As I understand it, Gravity waves do not require a medium to propagate, either.
attentiontodetale Space-time itself is the medium Gravitatioal waves travel through. They are distortions in space time similar to how water waves are the disortions of the surface of water. (note that this is obviously only an analogy). This analogy could be extended to saying that the medium of electromagnetic waves is the electric field, which does not require matter but is altered by matter which happens to be there.
It's not an explosion at all, though. So it's completely wrong to say it's the most powerful explosion except the big bang. Which also wasn't an explosion.
+wtflol1503 The same thing basically but the black holes in galaxies (such as the ones in our Galaxie and the Andromeda) are Super massive black holes which means that their gravitational waves will be much greater and we will be able to detect it without a shadow of a doubt.
My only problem is with “our” choice of names . A Black Hole , gives a pretence of nothingness but a Black Hole is the opposite and contains sooo much more than the “Space”, surrounding it . But there again I suppose it sounds better than say, “A High Mass non visual extreme gravitational well revolving around its axis”, Damn it ! Yep A Black Hole 😜🤪😃
It's due to Special Relativity and General Relativity. Basically, one of the things Special Relativity states is that space and time are part of one single thing called space-time, and one of the things General Relativity tells us is that gravity stretches the fabric of space time.
+Igetmoney Its extremely bizarre for sure. If you want to get something of an intuitive view to how these effects work I highly recommend PBS Spacetime's videos on gen relativity.
6:50 - "astronomers have ever *seen*" Oh I didn't know astronomers are time travelers who were there at the time of the big bang looking at it from outside like some kind of God-like creatures...
![Journey to the Andromeda Galaxy [4K]](http://i.ytimg.com/vi/-ybiXR2WCFQ/mqdefault.jpg)
His voice is awesome for narration
Collin Arms His voice is like a perfect combination of Kevin Conroy, and Peter Cullen...
He also sounds almost like a dead ringer for Neil Degrasse Tyson.
you need to do more videos like this. ive been following you for about 3 years now. awesome vids..so.educational
Me too. Love these videos
Soothing, yet powerful!
Absolutely wonderful--I love it! Thank you for sharing Tony!
I wish you did really long videos, you have the most soothing, easy to listen to voice out of any space videos. I just love it.
Your voice is deeply relaxing
Definitely one of the best video's to date.
The thing I cant understand is how these videos get dislikes...
religious people
Creationists
+Amir Hussain Think that one through again mate. I thought this channel was focussed on new new instruments/findings/ideas and when one sees an attempt at channelling Sagan with old ideas is very disappointing and I can imagine someone disliking it in disappointment, among a whole host of other reasons,some of which might be to do with youtube's algorithms (and therefore google's as well).
So, it is best to test your hypothesis to yourself before opening your mouth as wide as it will go and inserting both feet.
+neddy laddy Perhaps Sept 2015 is too old a finding for you? I agree LIGO is not new but the results certainly are, they were only announced last Feb. The dislike percentage is roughly 1% of the total views, so this is consistent with the other 290 some videos I've posted (with no apparent correlation to my attempts to channel Sagan). The only exception to that percentage was a very old attempt at a joke on intelligent design. Lesson in staying away from humor.
Deep Astronomy
cheers
A mild dissatisfaction with the video was being used as a"for instance" to illustrate my point, that the original poster had jumped in early with a (very) poor attempt at humour without considering whether there were ANY non-religious reasons to dislike it.
I didn't push he "thumbs down" button by the way.
Superb! Thank you deeply from my heart!
Tony Darnell and Dick Rodstein are legends in narration.
Black holes do emmit radiation: Hawking's radiation...
Nice music too .... thank you Tony
I'm doing an internship with NASA this summer, and we had a talk on gravitational waves, and I asked a question regarding the formation of gravitational waves. Everything causes gravitational waves I was told by the lecturer. The only way we get detectable gravitational waves is when two massive objects moving close to the speed of light collide into each other.
Great video! I ll keep looking up!
A great insightful video as always!
00:23 "Virtually nothing escapes their grasp" Was that a pun on virtual particles and Hawking radiation? :)
lol, I noticed that one too
I love that sound! 4:09
Great video! This is why I am subscribed. You deliver amazing content about space and science.
Amazing work!
thumbs up for u all guys works!
damn thiis is awesome... black holes are not from our universe but a result of two masses colliding in some other dimension.. crazy stuff bro
+john snow what
cool stuff bro epic science
+john snow what
+john snow That was not exactly what was meant, though. It's just that, because flat space has three dimensions, curved space needs more than three dimensions, so in order to visualize curved space, you have to imagine our 3D-Universe embedded in another Universe.
But that's just to visualize. Black holes are inside our Universe, but reality needs more than the conventional three dimensions to be properly described.
+Martijn Bouman i know nothing.
thanks for a great video yet again :)
11 people found no explanation for this in their ancient goat farmers diary.
I've watched a few of your vids. in a row. The one thing I have noticed, apart from their general excellence, is the audio quality. It changes with every video I have watched. Do you get lots of free microphones? :-D
Its killing me by seeing it,but actually it is nice and helpful
What world happen, if this event took place in our own galaxy?
How would it affect us?
will you collabrate with spacerip anytime in the future? maybe you would produce better content together...
both of the channels are best channels for astronomy videos...
perfect. can i translate and publish in my astronomy channel in portuguese Space Today TV ?
porkchop
+Amir Hussain rice and gravey
+relentlessmadman french fries and ketchup
KlowN not my first choice, but I'd eat it all.
i think as long as you dont monetise the video he probably wouldnt care
It says it's 5 years old but then it was uploaded April 26 2016
Make a video on the thing that recently SHOT OUT of one!!
Q:
Did black holes necessarily come from
exploding heavy or massive stars?
What about stars that rotate around
a common centre with no or little mass.
Can such stars collide
and change into a supernova
or a black hole?
And there are planets around dwarfstars
that can become trillions of years?
If such planets collect more and more dust
from space, why can't they change
into black holes?
Do you think gravitational waves have the potential to give us insight regarding the singularity of a black hole?
jake W As a (very) amateur astronomer, who has been studying black holes for the last decade, or so, I would like to say potentially yes, given enough time, observations, and sensitive enough instrumentation... but, realistically, I have to say no ... As we both know, a gravitational singularity at the heart of even a stellar-mass black hole is space-time curved infinitely in a infinitely small space; the way I try and think of a singularity is if the gravitational warping of space-time around a star like VY Canius (or bigger ... ) is squeezed into a space no bigger than a Planck Length... That's not only beyond the imagination, but beyond what can be imagined... at this point in time, we simply don't have the mathematics, or, indeed, the physics, to describe such a place, and I doubt very much if the problem of what lies within a singularity is solved within our lifetimes...
Astronomy: a mysterious, interesting and fascinating place! :D
I know one day I'll get to infinity, I'm counting on it.
I think I had some of those effects in my Windows 98 screensaver.
Entire galaxies can be devoured by black holes? Is there an example of this? Please explain!
+CJ Davis Yes, I am curious about that, too. As far a I know, it's not even the case.
+CJ Davis The time scales are very long, but it can happen. As galaxies merge and evolve their black holes also grow and as the models run their course, over time, all that's left is the black hole. Of course, we're talking extremely long timescales, much longer than the current age of the universe. And as many commenting on this video seem obsessed to point out, due to evaporation from Hawking radiation, they too will eventually die.
its all about escape velocity. the escape velocity of a black hole is likely equal to that the speed of light, if not faster.
Where do you get all the wonderful graphics that you use on your videos?
They usually come from NASA, ESA or ESO because they are govt organizations that put their work out in the public domain. Very occasionally I will pay an artist to make a graphic, but that happens rarely. Thanks for watching.
Can someone explain the upwards motion of space shortly before the collision? By my understanding of what's going on, it seems like the animation is suggesting gravity pushes you away.
+Matt Cooke Like water splashing up when you drop something on the surface, a displacement of mass will cause space-time to shift. From what I understand, it seems like mass was not conserved when the two black holes merged. Because the new total mass is less than the sum of the original two components, the shed mass manifested as a gravitational wave, as the sudden loss in mass (hence gravity) caused space-time to ripple.
Gravity doesn't push things away, but it does stretch space-time. If something can be stretched, it can also be compressed. A sudden loss of mass will cause oscillations as space-time tries to return to equilibrium like a spring.
Are black holes just like a giant recycling bin in this computer matrix?
+CJfgt I don't think so, considering the recycle bin has a recover option.
No, they just pack more and more matter into that infinitesimal point becoming ever larger until they (hypothetically) fizzle out as Hawking radiation long after the heat death of the universe.
Now THAT is Downtown.
Just like downtown!
HEY they're hiding downtown.
Do you think the Event Horizon Telescope will be able to take the first ever real photo of the event horizon of a black hole until 2018?
***** Well, it's not really like that, it's a collaboration from a lot of already existing telescopes around the globe. You can read more here: www.bbc.com/news/science-environment-35258378
What if you were caught in the middle of two colliding black holes?
RIP
Hector Meneses Yea, I was thinking on some SciFi stuff, like at the moment they joined it would transport you to a higher dimension lol
Considenring that in the mid-point between black holes collision the resulting gravity must be zero (both sides cancelling each other out), it is possible for light to escape. i will say yes (give me my Nobel prize) ;)
So do the 2 singularities merge?
just in time for Einstein's 100 years prediction celebration and ligo funds being wondered... what a coincidence..
It seems to me there are a few ways things can escape black holes. Hawking radiation, Quantum entanglement are two off the top of my head.
Yes. I hate it when they say "there is no known way to escape the event horizon"
Obviously, there are. Like, there aren't any kids watching this on UA-cam, be as scientific as you want!
+Dexter Peterson 'Obviously there are' Really? Obviously? Hawking Radiation and Quantum entanglement are ways to escape a black hole? Happens every day, does it? I'm going to start a new video series called, 'Shit UA-cam Commenters Say' I want to hear the obvious way to escape a black hole using entanglement and Hawking radiation. Do you have any antiparticles handy?
+Lucid Moses Both are Theoretical.
Let us know when you've proven either of them.
Till then, can a theory escape the event horizon of a black hole? Don't worry, it's rhetoric.
+Dexter Peterson
ob·vi·ous·lyˈäbvēəslē/adverbadverb: obviouslyin a way that is easily perceived or understood; clearly.
You can leave the final copy of your report on all the "Obvious" ways to escape the event horizon of a black hole on my desk by the end of the week. Or in the youtube comments below. I'll expect valid peer reviewed sources on all claims.
~thanks.
+Deep Astronomy Hey Tony. I wasn't referring to "pop science" channels where the host is chewing bubble gum. Thou I do watch PBS Space Time and I would say they are an entertainment channel. They do seem credible. Also, I'm not referring to some wacky, crazy theory. It's my understanding that the current leading theory of the universes end is heat death. That theory requires the evaporation of black holes. So, in what ever form... Somethings getting out. It's also my understanding that the uncertainty principle also allows things to occasionally get outside the event horizon. But, I'm not claiming to be an expert, just interested. So, if you can make a video disproving these I'd be interested in seeing it.
Imprecise and probably inaccurate-for example public lecturers claim that our time fully stops at the Schwarzschild radius, but if true then the holes would halt collision at radius-contact and continue radiating gravity waves; Also, the mass loss of the pair furthermore implicates another type of 'evaporation' where much of a hole mass is outside, its hole....
So does this mean the fabric of space/time has a density that can be measured?
+cyanidejunkie117 What exactly would density of space time even be? You could measure (or at least calculate) its curvature though if that is something like you were thinking of.
+Christian Matthe
Well, in order for waves to propagate, they must move through a medium, shouldn't that medium have a measurable density?
I don't know, that's why I asked.
By density do you mean a measure of how much a wave is bent/broken when it changes medium. Analogous to glass breaking light (as ina prism). This would be its index of refraction for Optics (not the mass density of the material).
For space time the closest thing to that would probably be curvature once more.
+cyanidejunkie117 sound waves and pressure waves in water, waves through the Earth (Earthquakes), etc, require a medium. Electromagnetic waves (light, X-Rays, Radio, etc.) are fundamentally different and do not require a medium. As I understand it, Gravity waves do not require a medium to propagate, either.
attentiontodetale Space-time itself is the medium Gravitatioal waves travel through. They are distortions in space time similar to how water waves are the disortions of the surface of water. (note that this is obviously only an analogy).
This analogy could be extended to saying that the medium of electromagnetic waves is the electric field, which does not require matter but is altered by matter which happens to be there.
It's not an explosion at all, though. So it's completely wrong to say it's the most powerful explosion except the big bang. Which also wasn't an explosion.
MOOOAR
two black holes merging create a power output similar to that of all the stars in the universe?!
Perhaps that is how you travel faster than light
+Dawnbreaker26 No.
yes
Consider for a moment how much energy is required to bend space-time in such a fashion. Where was the last place you saw such an output?
So what happens when the supermassive black holes in the Milky Way and Andromeda collide?
+wtflol1503 The same thing basically but the black holes in galaxies (such as the ones in our Galaxie and the Andromeda) are Super massive black holes which means that their gravitational waves will be much greater and we will be able to detect it without a shadow of a doubt.
+Monster Carrot Yeah, and the collision will be much closer to us, too. That would be a very easy detection indeed. :o
Black Holes - Cosmic Ninjas
Where are they? Yikes!
My only problem is with “our” choice of names . A Black Hole , gives a pretence of nothingness but a Black Hole is the opposite and contains sooo much more than the “Space”, surrounding it .
But there again I suppose it sounds better than say,
“A High Mass non visual extreme gravitational well revolving around its axis”,
Damn it ! Yep A Black Hole 😜🤪😃
can somebody explain to me how can time be slowed by the black hole?
It's due to Special Relativity and General Relativity. Basically, one of the things Special Relativity states is that space and time are part of one single thing called space-time, and one of the things General Relativity tells us is that gravity stretches the fabric of space time.
+Indra Otsutsuki
1. Very true.
2. I love your name ;$3
hmm thanks that helped but still having trouble wrapping my mind around that though..
+Igetmoney Its extremely bizarre for sure. If you want to get something of an intuitive view to how these effects work I highly recommend PBS Spacetime's videos on gen relativity.
6:50 - "astronomers have ever *seen*"
Oh I didn't know astronomers are time travelers who were there at the time of the big bang looking at it from outside like some kind of God-like creatures...
Tolyngee Oh I see, you are one of those people who have no idea what sarcasm and joke is.
Ha, I was the 420th like on this video 👍🏽
If people really have a soul can it escape a black hole?
+tritonmole no unless the soul is made of pixie magic
The big bogus..
What the FUCK is the BLACK REGION beneath the COLLISION?!
they call them "black holes" but yet they are 3D circles....not a hole at all..
I call bullshit......question everything, even science..
545th viewer!
I love how Science works in the entire Universe. It shows Gods Greatness.
1st
Nobody cares
yes but only in this channel
早く宇宙全体的🛰散布しろ！💢