Stephen Hawking's Universe EP5: Black Holes & Beyond (5/ 5)

[rugssean]

Hopefully we wont find any maneaters, who are searching for new sources of food

[remarkablevisions]

What happens if something enters a black hole? Black holes can bent light so all these theories are jus an opinion. At some point technology will be advanced enough where we'll be able to test these black holes with objects. Sadly I dought any of us will be alive for that moment. Fasinating show !

[42399]

It doesn't take a black hole to make things travel faster than light. In quantum mechanics, electrons, for example, are thought to sometimes a) be in two or more places at once and b) teleport with no regard to the universal speed limit.

As for Hawking Radiation, Stephen himself stated that he didn't think that the rediation had anything to do with the material. This means that the information IS indeed lost in a black hole.

[OneAlphaAi]

Hawking, you are simply amazing

"The loser will buy the other an encyclopedia, so that information can be found"

[KamikazeKameel]

It maybe sound crazy but, can't a singularity hide it's mass the black hole swallowed, in an other/part of an other dimension we can't see? Since there are only 4 Known Dimensions to humans but there are actually many more.

Crazy or what?

[muzammilali007]

I've heard that angels can travel any distance in T=0s so all we need to do is to ask our creationists fellas to send them to search for extraterrestrial life :P

And for those who say that NASA is hiding the presence of intelligent life then

1. NASA isn't the only agency in the game ESA and Russian space agency are also the big guns and now even China & India.

2. if the alien life is very advanced than we are there's no agency that could stop them from contacting us.

Science ROCKS!!!

[devonp92]

@muzammilali007 we may not be able to stop them from contacting us. the question is, who will tell us, if any agency would (i dont think they would, because it would litteraly cause pandemonium and people would become savage with fear) and when?

[muzammilali007]

@devonp92 There's an organization called SETI (Search for Extraterritorial Intelligence) its purpose is to detect radio signals from the milky way. There's even a charter in the UN regarding post detection measurements.

[GoneJackalPoleCats]

" But i think such contacts would be much more obviouse, and probable, very messy. " Hahahaha i love him.

[infernakill]

Since a black hole bends and morhps light, even eats it, sorta, couldn't you say that light isn't all that fast since it's being beaten by gravity?

[Unit88888888]

@infernakill just because its being eaten does not mean that it is not fast...

[akirafactor]

@Unit88888888 Communist sympathizer

[twitchalmighty]

Seeing as things like neutron stars exist, what if things like Quark Stars, or preon stars existed? I'm not saying that I disagree with black holes - I find them extremely intriguing. It was only an Idea. And Quark Stars haven't been proven to exist as of yet.

[rysnyper50002]

The subject of the "what if" of alien civilization seems possible but may be hard to see happening anytime soon. Think of it, If aliens come out of their way to see us, we would be viewed as a "ancient" civilization to them. It's like us going back in time and seeing ourselves at 500 BC.

[keggerous]

stephen is so awsome the way he wheels around and shit talkin like a gangsta!

[radecky84]

hehehe...

[Geodesic1983]

the universe was made when santa and god had a baby. fork-in idiot's

[nekkro92]

did you guys read steven hawkings book? he says in it that his greatest obstacle in life was  stairs.

[badmansabir]

so if the universe is expanding then what is it expanding into and if the universe was here before the earth then how big was it and what was beyond it?

[Geodesic1983]

nothing, nothing the human mind could grasp anyway. no time, no space. Don't worry about it, or you'll start crying yourself to sleep at night

[jaceaerojock]

@Geodesic1983 I like your name Geodesic. Not many people are familiar enough with topology or I guess differential Geometry to appreciate it.

[KriSaku]

so aliens could be our future civilitation that are visiting their past? (our present)

maybe they are warning us from a future disaster, but why is the NASA hidding all this info about extraterrestial life form all teh humans?

anyways Science is awesome :)

[Des3rtEagle]

if "aliens even if they could travel at ather planets and with speed of light they whouldnt leave to get to us alive so they maybe travel trouh black holes"or this was stupid?;P

[ImElvis666]

Such a pity this video has a relatively low view count. Science is so wonderful!

[downundabruthahood]

Yeah. Thats why there are so many creationists.

[ananiasacts]

It's a thought experiment. I'm guessing that you'd end up with a black hole with the mass of both objects since even though the matter may be converted to energy inside the black hole, it can't escape either and has the same net mass-energy as both objects started with.

[soedblackchaos]

Well, "inside" said singularity, could not the energy created from the combination of matter and anti-matter cause the seething singularity to suddenly expand into a "new universe"?

[wado1942]

Interesting idea. Though I must say that by the time you get down to a black hole, there's really no such thing as matter or antimatter. Now, one theory suggest that matter and antimatter are equal in the universe. Matter is moving one direction in time while antimatter is moving the opposite. That said, there's a theoretical phenomenon called a "white hole" that only ejects matter/energy. That would be the equivelant of a black hole traveling the opposite way through time.

[ananiasacts]

@wado1942, I get the feeling that angular moment plays a much larger role in BH physics that our present theories reflect. Even inside the event horizon the cosmic speed limit, C, is still in effect. Doesn't this suggest the singularity (a ring, not a point) has a maximum rotation rate based on it's radius? (and relative to the space inside the EH, which would be rotating as well) Perhaps that mechanism effectively prevents more matter from falling in somehow.

[wado1942]

Hmm, if a black hole was massive enough so that the linear velocity at the equator was near the speed of light, any matter falling onto the surface would be travelling slower. This would increase friction, probably destroying the particles. However, the radiation wouldn't be able to escape due to the warping of time and space. That said, nobody knows the REAL density of BHs so time/space may be warped in such a way that the speed of light is no longer constant relative to outside the horizon.

[ananiasacts]

@wado1942, I don't think there is any limit on how fast space can move. The space around a black hole is rotating with the hole. It is relative to that motion that velocity matters. I'm assuming that it is typically much faster than C simply because that's the only place the angular moment (which must be conserved) of matter falling in can go.

[AvoinTarina]

And the friction would probably slow down the black hole over time...

[jaceaerojock]

@AvoinTarina I see no logic in this statement.

[ananiasacts]

What happens if a black hole made of matter collides with a black hole made entirely of anti-matter? (assume the difference in masses isn't enough to make a stable black hole.)

[FujisDead]

i dont think physists know that much about anti-matter to say what could happen. But i think what the video was trying to explain is that instead of antimatter and matter equaling out the universe, there is flowing time and energy, and sucking time and energy (black holes)And that eventually everything will get sucked up, and equalize itself, leaving nothing.

[youloob2]

shit dont mind the first 2 lines in my next post sorry every1 was mad at summin lol

[youloob2]

hawking may not be that smart... and u are even more stupid for thinking theres no point in tryin :( FIRST. a QUASAR is nothing lmao... some guys gettin creds on sum bs cuz his star makes radio waves yea i would to when im at those temps... unfuckenbelievable

SECOND a black hole cannot appear as a disk... thats just dumb, its a singularity, the darkness is the signs of its event horizon where light itself is bent backwards from the mass of a singularity.

[youloob2]

and wtf thinks ur gonna end up in another dimension... lmao welcome 2 world of hurt, and planet arrived b4 u left jk... come 2 think of it, how can such a genius say that a neutrino is faster than light and capture one lmfao... ok faster than light in the rules i been following means arriving b4 u left doesn't it? If it doesn't then clearly no time travel going on in the black hole just normal predictable inescapable gravity... meaning yes a big crunch. am i right post summin if u agree.

[nicksynnz]

Did you say Hawkins is not smart? He holds the Newtonian Chair of Mathematics...his IQ is greater than you and your whole genetic pool.

[stevenwcherry]

If nothing disappears-what about the theory of Shrodinger's cat? It may be that the empty vacume of space has it's own properties (universal constant/dark matter). If space and time curves around matter (eg. planets/blackholes) perhaps it formes "mountains" in empty stretches. The universe(s) may have formed from the implosion of space resulting from infinate absolute vacume.

[srarmageddon]

The Simpsons are going to the black hole! (3290AD)

[gregjockca3]

come to think of it, maybe everyone is being so dense about this because they can't fathom the idea that black holes violate thermodynamics by "creating new matter" inside. however, when we finally understand that all matter and energy are just waves in spacetime, matter really isn't being created, just more "waves" which in our macrocosm looks and feels like "new matter and energy". waves can be much smaller than planck's distance as well hence quantum unpredictability. DUH!!!!!

[kowdermeister]

Sorry, this is a good comment, just pressed the wrong hand :)

[tepanec]

thats a posibility, but then the universe in round but if is round whats out of the circle?

[keyan99]

stephan hawkingg is so awesome.

[gregjockca3]

yes! best gimp ever. gimps rule!

[mattcroy1]

Hawking said that he believes particles can escape black holes if they are traveling faster than the speed of light... according to general relativity, isn't it impossible for ANYTHING to travel faster than the speed of light?

...or is it that the laws of physics really do break down at black holes?

[Gravitationalist]

The laws of physics break down at the singularity but not at the event horizon.

I don't think that's what Hawking said. A long time ago he said information was lost when it entered a black hole. Suskind said he was nuts and set out to prove him wrong. It took him like 10 years but he eventually proved Hawking wrong.

Hawking came back and proved both himself and Suskind wrong. Hawking lost a famous bet over this.

[Gravitationalist]

(cont)

Information is NOT lost in a black hole. It radiates away. It's caused by quantum fluctuations(virtual particles) at the edge of the event horizon. One particle gets trapped in the black hole the partner particle escapes because it's outside of the event horizon.

This is now referred to as Hawking's Radiation.

Eventually all black holes will release everything back into the universe and nothing will be lost.

I might have some details wrong but that's the jist of it.

[SyncroFei]

Particles at the edge of the horizon that are broken into matter and antimatter particle pairs can happen. Usually the 2 rejoin, collide and negate each other, but at the edge, it's possible for one of the halves to get sucked in, and the other to escape. Black Holes that emit radiation are explained by this. And, yeah, they don't travel faster than light.

[Darwinbeliever]

you are well informed indeed but i thought his latest assertion was that black holes evaporate over time and disappear with the information i.e.(matter)they have consumed (information paradox) and that there must be multiple universes and the only ones that will be relevant over time are the ones without black holes to disappear it in the first place?

[gregjockca3]

AAAAH!!!! will people stop misinterpreting what disappearing black holes mean??? black holes are just heavily curved spacetime. when a black hole opens up again, it "disappears" only in the sense that curvature disappears. the stuff inside is eventually revealed over aeons of time. ergo nothing "evaporates". why are physicists so dense?

[gregjockca3]

dense, hahaha, sorry, pardon the pun.

[gregjockca3]

it doesn't matter because black holes eventually open up again after many tens of billions of years. so whatever info got sucked in, comes back out eventually. it's all moot crap.

[crazydammonkey]

@Gravitationalist so wat ur saying is that everything is destroyed but it is also recreated??

[jaceaerojock]

@mattcroy1 Just a thought, but you seem to be unfamiliar with what you are talking about. Actually Hawking never argued that anything ultrapasses lightspeed. Its a quantum effect. Your claim is not what is in his research. Here's the paper... assuming that you have some math behind you. Hawking, S. W. (1974). "Black hole explosions?". Nature 248 (5443)

[ilikethewordrandom]

@mattcroy1 he said ''IF'' he didn't say it was possible ... :)

[JulioMarco]

@mattcroy1 The equations of general relativity state that it is impossible for a particle with mass to fly exactely at the speed of light (c).

It is understood that an object could not fly faster than light simply because, in order to do so, it would have to speed up from a certain point and eventually reach that speed to go beyond it.

There is, though, the theoretical possibility that an object may exist faster than c. It would be called a tachyon (fast particle). None observed... as yet. ;)

[BKsMassive]

@mattcroy1

speed, time, gravity and other things are all linked.

if you are traveling at 99% the speed of light time will low down for you and it is believe if you go faster than the speed of light ( which is impossible ) time will stop

[xmollyx04]

@mattcroy1 4 years after this comment was posted and now we believe that neutrinos can travel faster than the speed of light. How times change. ;)

[castillopatino90]

@mattcroy1 There is a big dispute between general relativists and quantum physicists. The one theory describes the very small objects in our inverse such as strings & the string theory. The other, General relativity or even the Newton laws, describe the very large object such as super massive stars, supernova & black holes. In string theory. These two laws are like water & oil to each other. They simply do not mix in a cohesive way in a purely mathematical manner.

[Maej12345]

sorry if this is stupid... is it true that. the center of the galaxys have a black hole???

[Gravitationalist]

yes they do

[sjonsigurson]

I love jello,..

[WARSTRIKE1]

Is it possible that on the opposite side of a blackhole that is sucking up light,matter..etc it is forming a new universe/galaxy on the other side? Could it be how our galaxy and other galaxies were formed?

[soapz1]

The big bang is a black hole in reverse. All the calculations stay the same but with t (time) replaced by -t.

[4sight2020]

There is no mathematical basis for this but it is an interesting concept. By definition, NO, black holes do not do this inately. You are thinking more of wormholes through which matter can pass through and may be the "gateway" between the now theorized multiverse we seem to be a part of, although there is no mathematical proof which provides a linkage between the multiverse and wormholes that I'm aware of either.

[aarozona]

Okay, here's my dumb question that was probably answered in the show, but unlike quasars I'm not that bright. Are black holes infinitely small "holes" with a large magnetic field that make them appear large or are they giant black spherical stars? Do I even know what the hell I'm asking? :^)

[Gravitationalist]

They are like a black spherical stars. In the center is the infinitely small region known as a gravitational singularity.

I have trouble myself understanding singularities but I'm working on it.

[mmanoba]

Imagine the tip of hair with a mass of the entire universe. A BH's shape is something weird than that. In fact, one cannt imagine that point, which is called singularity, where all the laws of physics fail. But what defines the 'shape' of BH is the event horizon, beyond which the BH starts to grab things, even the light and magnetic field. In other words the starting point of gravitational influence.

[bredmond]

I don't think it has the mass of the entire universe. That would violate Newton's laws of thermodynamics: matter cannot be created or destroyed. it can only have the mass of the matter that it engulfs. But I'm pretty sure that it does have infinite density though.

[tehmattbookpro]

@Gravitationalist I do too. It's one of those quantum mechanics bits that also influence the fabric of space-time in Relativity...If only String Theory wasn't a theory.

[tehmattbookpro]

@Gravitationalist I do too. It's one of those quantum mechanics bits that also influence the fabric of space-time in Relativity...If only String Theory wasn't a theory; we wouldn't need to be super genius to comprehend it.

[sssorry]

@aarozona Imagine you and three other people are holding a stretched out blanket; this represents the fabric of space/time. If you set a basketball on the blanket, it makes an imprint on it, like how our sun does in space. If you set a baseball on the blanket, it may roll around until it's caught in the basketball imprint on the blanket, like how our Earth orbits the sun. A black hole is so dense, it literally falls through the blanket, stretching the blanket infinetly.