Full Episode | Hunting for Black Holes - StarTalk All-Stars
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- čas přidán 23. 08. 2017
- If light can’t escape from black holes, how can we observe them at all? Find out from astrophysicist Janna Levin, co-host Matt Kirshen, and Shep Doeleman, the MIT astrophysicist leading the Event Horizon Telescope project to study black hole Sgr A* at the center of our galaxy. Note: If you don’t want to wait months to watch these, subscribe to #StarTalkAllAccess & see them the same night as the original podcast!
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Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
#StarTalk #JannaLevin - Věda a technologie
This is one of the best episodes I've seen. Lot of new information, not just talks beating about the bush.
I love this. Could listen all day.
I want the astrophysics black guy
Orson Welles i read it with the "through the wormhole" black guy's voice
Orson Welles I love Dr. Tyson!!
Hayden planetary fly!
How do you want him?
Orson Welles LOL ERB
I'm loving this! Such a fun show to watch, very interesting and entertaining. Thanks for the great post!
A couple of months ago we saw the first images of the Event Horizon project and it was awesome!
Great talk, a lot of new information that I had no idea about and the video came in just after the data was collected so now I'm hyped. Good job!
Jan 11 is my favorite!
I always think of her full name this way too. Ahahahaha. Jan 11. Hahahahaha
She says that would be her sci fi name.
Great episode.
She's a good host!
¡Me encanto el programa! (Loved the show!)
Favorite episode!
Its just not ALL-STARS without OUR BRIGHT STAR Dr. Tyson.
Jenna is the best, she should have her own show.
they said that they were planning to take the first "photos" in spring 2017 (nr the 39 minute mark), (which has passed) is this a mistake, or was this filmed a long time ago, and only recently uploaded here? (it would be nice to have a date for when this episode was originally released in it's original format)
findings still to come. Waiting on Antarctica data.
I heard George Takei describe how his first experience was with a guy with "golden forearm hair". That's what attracted him, those little things that catch our eyes, and then our hearts.
Looking at Janna's forearms when she is gesticulating, describing these deep cosmic phenomena, her forearms are so full of vitality, "the musculature", it really is quite sensual, oh my...
Veritasium did the "what way does water spin" experiment. The coreolis effect makes the water spin "the other way" but a lot of variables goes in to a regular toilet flush. When you eliminate all those variables you see the water spin the opposite direction then the northern hemisphere
i love janna!
I love Janna. She is what all women should aspire to be
That Gravity and temperature analogy, is very interesting..
I agree. That was 'put very well'.
Shep Doeleman has the most interesting / important job in the world / universe!
If this is a trial to see how the program works without Mr. Tyson, my heart hurts a little... Nonetheless, I appreciate the effort and i think this was genuinely enjoyable. Janna and Matt were a little clunky the first 10 minutes or so, but got into a nice dynamic going soon I thought.
So in the nerdiest terms of enjoyment possible: This new format has my personal stamp of partial societal approval to take this version to regular show levels of production, deeming it necessary to invite scientists to participate as illustrious and quick witted as your guest in order to compensate for the lack of NdGT.
This is an episode of StarTalk All-Stars. It's our spinoff with an all-star group of other science communicators! Neil's still the host of StarTalk Radio.
I love nerd humor! Thanks guys and gals! Peace!
Is there something in radio telescopes comparable to optical, when it comes to "focus". In other words, how do you differentiate close objects versus distant ones, with radio astronomy?
wish they would speculate on planck stars being the center of black holes. slowly exploding due to time dilation appearing from outside as hawking radiation. thats a hell of topic.
so at the center of a black hole is a singularity, is that an actual mass object? and if so can anything be smaller with the same or higher mass?
19:43 But you can hide in a Bok globule... to a certain extent (like with normal 'visible' wavelength light).
The shadow they mention being 'cast'... What is it cast upon? If blackholes absorb light, how can any light be cast around or through them (outside of gravitational lensing) to even cast any kind of shadow? (unless it's the acretion disc's actual shadow and not the black hole itself being cast on neighboring gases and the such.)
I just asked a question about miniature Black Holes in the Cosmic Queries and here I see a discussion on it done a day before I questioned!!!
Short version: if they do they would in the same instance evaporate out of existence. Otherwise defer to the answer Shep gave.
Woah! I did not see that coming. I happen to be in college, and btw college years in my country are 11 and 12 standards, so this blew my mind what you wrote
But I still really appreciated a reply :D
Black Hole Blues!!!
The guy with the glasses reminds me of Michael Fassbender
Great script writing! So creative.
Explain the sun and water connectionn it struct me as odd , is there mmore to it ?
Probably Science!
Neil is awesome
It's a blue box.
0x29a Bloody hell
black-hole doesn't transport you to other so called dimensions or possible shortcut to distant stars its just a concentrated matter with a super large amount of gravity. its like a wet cloth you twist it in order for water to pour out but black-hole never stops twisting the gravity it will explode if the space and time bond is imbalance so in order to everything is in place it will explode so that space time bond is well preserved. don't mind me thanks.
light can't escape because it doesn't any have time inside. the black-hole breaks down the space and time bond
To think, I travelled all the way back from the 23rd Century to see this.
how so? :)... do elaborate, lol.
It involves a lot of anti matter.
Is time dilation easier to see with a mirror?
water does drain in the reverse direction in Australia (from America) unless there is some force acting on it other than the spin of the earth. See Veritasium
Where is Mr.Tyson?
Jason Hong he fell off the ice wall
he stared straight at the eclipse and is currently on sabbatical training his seeing eye dogstrophysicist.
schadenfreudebuddha I was trynna sleep and u woke me up
Too funny
This is an episode of StarTalk All-Stars - hosted by a rotating group of science communicators. Neil still hosts StarTalk Radio!
Jana 💘💯
is it possible to get a satellite somewhere near a black hole and insert a probe connected to the satellite with a camera on the end of it and see the inside of a black hole then remove the camera?
Black holes have enough gravity to pull in light. Nothing that goes in can come out again. Not to mention that there wouldn't be any light for the camera to capture. Also before we can ever try to see a black hole with any kind of instrument up close we have to figure out how to travel 26 light years to the closest one.
Does time stop at the event horizon or in a black hole?
Time doesn't stop per se. If you were crossing the event horizon, for you nothing would change, time would still be ticking for you, but for someone outside the event horizon looking at you crossing it, it would seem as if you froze at the event horizon.
Relative to an outside observer, time would essentially stop, as they wouldnt see you actually pass the event horizon. Hence 'Relativity'. Relative to YOU, you would fly right on by the event horizon into the black hole, but relative to an outside observer time would slow so much so that they would never see you pass the event horizon, so the them time would 'stop' for you, but it actually wouldnt.
No, because time is not a material thing that can be manipulated.
Yes.
Are black holes disk shape spherical or straw shape?
Black holes themselves are 3 dimensional circles, so they are spheres. You can 'fall' into a black hole from any direction. The acretion disk around the black hole is an area of gas and/or matter swirling around/outside the black hole's event horizon, falling inwards in orbit in a flat disc shape. Once the gas/matter falling inwards passes the event horizon, you will never see it's light again. So black holes themselves, are spherical.
So is space actually 4D + time and we only perceive 3D + time? Or is space 3D with a funky warped time dimension?
The second option, I would guess.
I'm not so sure, how would light bend round the sun if it could only go slower or faster in straight lines? I'm thinking first option.
Do astrophysicists study the dog from the Jetson? I wouldn't think there was a enough to study for just a talking dog. Oh my god it is a talking dog. I just realize that just now. I want to be a astrophysicists now or a scoobyphysicist. You guys are so lucky.
hypothetically if a blackhole the size of the diameter of a average baseball, or a dime appeared on earth. What would happen? Would the blackhole's intense gravity cause all the wind to flow towards it to with typhoon/hurricane force winds?
A black hole the size of a dime would have roughly the same mass as the earth. Black holes don't create 'suction' as you are describing it here, rather matter will 'fall' into it. That black hole would not vacuum up the earth, the earth would be ripped to shreds as it succumbed to the gravity. The earth and the earth-mass black hole would ensue in a gravitational tug of war that would result in (most likely) the earth being torn asunder. It would cause devastating natural disasters and the earth would be under a whole new level of stress with an object that massive nearby. I can't define all that would happen as i'm not a physicist, but I can tell you it would be much more terrifying than a hurricane. Most likely it would be over before you knew what was happening, though.
ok, So from what you are telling me. I perceive it as the blackhole being very close to earth, within the roche limit, The earth, would be torn away by tidal forces.. So hypothetically, if a blackhole the size of the diameter of a dime appeared, the most likely event would be.. earth would in a matter of seconds start breaking apart. I would've figured something like when that giant planet appeared near earth in that show (rick and morty) mass hurricanes, and global catastrophe's start happening.
GPs systems do not have to correct for general relativity to function. However to function more accurately they do account for it, but to simply function .... that is not a requirement.
It is a required. If not corrected they can give you an error of approx, 11kms, when it comes to location
24:12 “Much worse things are going to happen to us in the next ten years”... Janna’s telescope looks to the future not the past.
There couldn't be a singularity in a black hole.
Time stops at the speed of light. We've all heard the physics. The universe unfolds as you go in. It's not unfolded yet. This means undeniably, the energy is still on the event horizon.
Only exception would be if everyone has the math wrong.
Einstein was right...it won't come to a singularity... Time stops.
More likely the spacetime around it is infinity... This simply means the energy is stuck. Spacetime is in motion. No one refers to this other than the expansion of the universe, but it makes everything work. If spacetime is being stretched at the speed of light it's
simply an impasse... Stuck. ???
I believe the stretching of spacetime in motion is gravity. That's why things change path towards other mass. Space is in motion. Things just stay in the place and motion they're in as space curves. Space is actively curving. Not just already curved.
2023 remake please :)
5:11
WAIT - I thought, the clocks in the satellites run slower because of their constant high velocity relative to earth! Am I wrong?
The run slower because they are moving, they run faster because they are further away from the gravitational field of the earth than us. The combination of these two relativitic effects means that the clocks on-board each satellite should tick faster than identical clocks on the ground.
Ah, okay. So the gravitational time dilation has a larger effect than the time dilation caused by the high velocity of the satellite?
Very much so, but it depends on the scale. Imagine being on the fringe of a super massive blackhole's event horizon. Time would slow far more then the equivalent of of the time dilation of the velocity of you orbiting that same black hole very fast at a distance.
What would happen if your hair would be inside the black hole, but you would still be outside, traveling near the speed of light to escape (and slowly pulling away from the black hole) ?
You can't know, you won't feel the tidal forces until you're very very very close to the blackhole. You will pass the event horizon (point of no return) and you wouldn't know. This doesn't mean you will feel something: you won't.
Once you are in the event horizon, if you try to go at the speed of light, you won't be able to escape. So once your hair will start to spaghettify, if you try to escape at c = 1, you won't be able to do so, it's too late (to apologizzeee, it's tooo laaate).
Yea, but I was asking if just my long hair would be inside the event horizon, and I would be outside going away from the black hole...
Then you would be like Hawking Radiation. Where a pair of particle and antiparticle come into existence, but instead of annihilating, one is on the inside of the event horizon which cant escape, and one on the outside which does escape at the speed of light. So you would never see your hair again, but YOU would be ejected at near the speed of light if not AT the speed of light. Talk about a Buzz Cut. lol
I went to school with shep
I Love Jana. Sexiest voice and insanely brilliant mind behind it.
This was highly technical...I really feel for the comedian on the panel, he seemed utterly lost. As am I.
You need to use a telescope geared for x-rays or radiation
Shep said spring 2017 more than once.... So....
1) How old is this video?
2) Did the Event Horizon Telescope work?
They did observations of two black holes in April 2017 but the images aren't available yet. It looks like the earliest they'll be able to synthesize all the data from all the telescopes together is September 2017, due to needing to physically remove the hard drives from an Antarctic site which reopens then:
"So far, the data processing centers have confirmed that all the sites in the EHT worked well, except of course for the South Pole, where the hard disks used to record the data are being stored until the station re-opens in September and flights are allowed in and out. This is very welcome news, but at this stage no results on the two main targets, SgrA* and M87, are available."
eventhorizontelescope.org/blog/eht-update
Gotta have a comic.
There is water on the Planet Mars.
Its a blue box #getyourfactsstraight
Move Over NDT Jan Eleven in the house
The size of the actual object of the supermassive hole at the center of our galaxy is 4 million times what the sun would be at the density of the black hole. Assuming that THAT density is near the density of a neutron star, and calculation that into a spherical shape, it would be about 2000 miles in diameter. Closer to 1771 miles...but who cares....2000 is close enough for the sake of argument. The event horizon is a different story, and can be much larger. That has to do with gravitational field density for a distance from the object to where light cannot escape.
event horizon = point of no return
why not just say, outside the event horizon things are fairly normal, and inside the event horizon you get crushed to a point and vanish into another state of being. squished in effect. harry cliff said that black holes were created in the LHC, but they exist for such a short space of time as to be negligible, other than for the experimentt (higgs boson)... okay, paradox time, the further we look out into the cosmos the further back in time we are looking, so things right at the edge of our telescopic sight are "as old as the big bang" is that right? so if they are as old as the big bang, why are they out there and not compressed into whatever big bang shape ?? i mean if the further out you look the further back in time you are seeing, then how come all that stuff is not in the state it was at the big bang? we can't be seeing back to the beginning of the cosmos surely? hard to describe what i mean. how close to the center of the milky way could a habitable planet be? i'd love to right in the middle of that glow, but as you get closer to the center does radiation, debris etc make it impossible for habitable planets? what would it be like, night sky wise, if you could live right at the center? forget that, worked it out for myself....d'oh.
Neil
So black holes don't affect dark matter, then.
Brilliant
The size of EARTH 🌏??!!!!!!!
I didnt get the role of the red tshirt guy, he never followed what the other two were discussing. He was playing the clown.
filling in for Eugene-Chuck? can't just have two smart people talking these days.
It's a three-way. You can't have a three-way without a third person. I bet they had fun after the filming.
when both guys are fighting over a girl but the physicist gets better jokes than the comedian and the comedian stares at his papers and dumbly his cohosts
migfed you started that you didn't get his role, then identified his role within the same thought. NDT would roast you.
Neil had him on another Startalk special edition where he interviewed Steven Hawking. His jokes weren't bad but he definitely doesn't contribute to the science. Gotta love Chuck Nice.
Because I have to restate (C)Meddling_Martian - I Namedmy Algorithm Singularity.
33:10 hang on... aren't you supposed to theoretically be able to trace back what went into a black hole by analyzing the information on its surface?
The information itself has been pulled into the black holes event horizon, so it can never escape, but it must go somewhere. Whether be held in something we have yet to discover 'inside' of a blackhole, or gets radiated outwards as a part of the quantum 'hawking radiation' before ever reaching the singularity.
what do they know about the next ten years....
There is no such thing as a "SINGULARITY". That is a term that defines where their math breaks down. Matter is energy, and like a neutron star, a black hole is a super dense ball of "matter" probably a quark-gluon sphere, with a density close to that of a neutron star. The fact that a black hole with 10 solar masses and 10 billion solar masses, behave gravametrically the same, suggests that there is a "MAXIMUM POSSIBLE DENSITY" of matter. After you achieve that, the object simply gets larger.
Janna is a bit flirtatious. I like that. You don't see that often with science girls/women. You can be glad to even have women around in the field of science I guess(even though that is shifting).
I'm flirtatious. At least according the maths I am...
Where's Neil? No Neil? Bye
I don't really need any filler, I just want the information. The red shirt guy seemed out of place and mildly obnoxious
Lohst and just plain not funny, unfortunately.
I believe these guys were high and enjoyed being paid salary by govt.
Holy ass this comedian cohost is so baaaddd
Anyone seen Andromeda? ikr
Bluetooth.
So much better without neil and his Hey look at me interruptions..just great information from great people
Ok I'm only 1.5 minutes in but a telescope that's the size of Earth? Get the F out of here. Hopefully they will explain as I keep listening.
Black holes? Earth its flat folks! Want it or not..
Sad strange little man, you have my pity.
PaleGhost69 did you read?...... Want it or not is flat! :)
nope earth is cube
spawn 419 sure
According to my rubrics, not just any cube ... a rubix cube! :D LOL
Very interesting, and thank you for this...however, sad to see they are not so evolved as to be above a really bad hairstyle.
why bother with a comedian...awkward.
Because not everybody tunes in to science. By making the discussion a bit more broad (as in, 'murica) you can keep people chimed in and have the science going to their ears but they will stick since they get a joke once in a while to refresh their brains since they might catch on fire when they hear words like event horizon, hawkin radiation, word lines, casuality etc.
Alexandru Gheorghe if you're not interested then leave. Not everyone needs catering, they're fishing for views if otherwise
his teeth are falling out
They're so annoying.
Does her constant giggling grate on anybody else? Can't stand listening to her.
Not really.
I actually find her very attractive. She has a lot of the feminism that I seek out. And she's a scientist. So, pretty fucking rare. Saw the ring on her finger and I instantly went sad :( Lucky bastard!
Alexandru Gheorghe definitely agree on the feminine, 10/10 section and also the intellect. It's just the constant laughing even after a few words that are not funny. (Insert unnecessary laugh her). :-). David
Regardless of her voice, she is one of the smartest women in the astrophysics community. Would you 'hate' on Einstein because his voice annoyed you? He still came up with the matter energy transformation, E = MC2. :)
MrTaz6552 I can't stand reading your comment. Anyone else really annoyed by comments like these? -.-