>>595572274 black holes are a visible distortion caused by inconsistancies in the universal constants such as gravity and light.
i.e. time is not the same here as it is in a different galaxy or on the other side of the milky way, it could move slightly faster or slower. same for gravity and possibly even the relative size of molecules.
a place where gravity is so high light can't escape from it. And time is determined by speed and gravity, if u increase the gravity time passes faster, just as it dose if u travel really fast. If you would to enter a black hole and escape alive u would technically traveled in time cuz everyone else would have aged faster than you.
might be wrong on some parts, thats what i remember on the top of my head.
a black hole is an area of space in which the universe is no longer expanding. think of a balloon you're blowing up while you keep your finger in one spot. gravity is related to expansion of universe indirectly, so denser things don't expand as fast - what we think of as movement - and therefore have more gravity
>>595573719 the point is that the "center" of the black hole is a point in what we perceive as the timeline when to when it stopped expanding. but since the rest of the universe is expanding around the black hole there's no real way for us to get to any other "space" in that "time" but that exact spot where the black hole's center is.
A black hole is the event horizon of a singularity caused by a large mass collapsing to a sphere with a radius less than the Schwartzshield radius. (No Googling allowed, so I'm 90% sure I fucked up the spelling there.) Conventional wisdom is that light cannot escape, though the energy of the vacuum is thought to cause spontaneous pair production/annihilation, which could lead to very slight radiative losses in mass if one of the particles is lost to the black hole. A black hole does not have an "other side" so time travel through one is impossible, though travelling in close proximity to one will cause time dilation effects which are similar to those caused by travelling at close to the speed of light relative to some other reference frame.
a black hole is a massive celestial object with incredible amounts of gravity and consists of a horizon, and (some german sounding word) radius. it grows off of objects around it as it pulls them in, it's created at the end of the life of a massive star and when you enter the event horizon, time slows down like a motherfucker. it sucks up everything including light. There is a supermassive blackhole in the center of our galaxy as well as most galaxies (maybe not elliptical galaxies i'm not sure about that one).
a black whole is simply a massive star in it's last phase of life, it just collapses and creates a super compact mass that has such a strong gravitational field, that not even light can escape from. Fuckin nerds.
>>595573999 additionally think of the black hole - and the universe not expanding - as the opposite of einstein's theory of relativity. if something is traveling faster and time seems to have slowed for them, something traveling slower will seem to have time passing faster for them. you can't expand slower than a fixed point.
>>595572274 a collapsed star where the mass is super condensed.
we can time travel by traveling just outside the event horizon and use that the pick up speed and as we get closer to the speed of light combined with the proximity to the highly dense mass time slows down for the passengers aboard the ship however time everywhere else goes on as normal, therefore we are traveling into the future. you can't travel backwards however.
A black hole is the leftover matter of a supernova (in which a star of mass over 1.4 times our sun dies). The gravitational pull of this matter is strong to the point that not even light can escape it. The even horizon is described as the point in which this gravitational pull is at it's strongest to not let even the fastest thing in the universe(light) escape. Theoretically, if one of us were to wander near a black holes event horizon, [if we somehow bypassed being put into orbit around it due to its gravitational (starlike) nature].
Area of space where all the contained matter within is so massive it's gravitational field is strong enough to overcome the ability of light to escape it.
Traveling close enough to the black hole without actually going into it causes you to "warp" into the future (realistically, everything outside seems to be going faster than you are). You can't time travel by going into a black hole.
I'm a physics undergrad. My research has been in high energy cosmic ray physics, and I've never taken a course in which we studied black holes, but here it goes.
A black hole is matter that has been packed so densely that the gravity has become so strong that it is impossible to escape from the black hole once one has passed the event horizon. I don't know exactly what happens to the structure matter that it changes from being matter to being a black hole, I just know a certain amount of energy has to be in a certain space. I think the equation is G/r=m.... or something like that, where r is the radius of the black hole, G is the gravitational constant, and m is the mass in the black hole.
We can travel through space (theoretically) through a black hole, because the gravity of the black hole is so strong that it warps the fabric of space time back onto itself creating a wormhole. I would include a picture showing this, but that would be googling it and is against the rules. We can go through the black hole and out where the space has connected to, somewhere else in our universe.
We can travel through time with gravitational time dilation. Being in the presence of a gravitational field slows down time (your head is older than your feet are, hehe). Since the strength of a gravitational field around a black hole is so strong, by approaching it, we would be slowing time for ourselves quite dramatically. Of course we would have to create some machine such that the gravity didn't destroy us. Submersion in an incompressible liquid might do the trick.
Also, to get near the black hole, I imagine we would orbit it. Once we got near the black hole, our orbit speed would be quite fast, and although I forget the term for it, an increased velocity dilates time as well.
>>595576266 Theoretically you can, if you somehow managed to be brought to the edge of the event horizon and back, you would have been inside a point in space time in which time behaved in a different manner than when you are away from the event horizon.
>>595572274 Black holes are the dying remains of stars that collapsed on themselves. Their gravity is so massive, not even light can escape. We can 'time travel' by getting near one, but not close enough to get sucked in. We will age at a much slower rate due to time passing slower than on earth. 1 year near it is equal to 10 years or so, so you could only age 1 year and say you had a twin, he/she would age 10 years But im just pulling this outta my ass
Black holes are super dense objects which indent the elastic space-time plane to a point where light can not escape past an event horizon.
Any half educated asshole could tell you that it's impossible to travel safely through a black hole. (That is if you exclude hypotheticals about white holes, which have not been proven to exist).
A wormhole on the other hand would require a sort of exotic matter found on the very edge of an event horizon caused when half the quantum particle is ripped towards a black hole and the other part bounces away. This form of antimatter would be required to counteract the gravitational forces in the wormhole and strengthen the bridge.
This is just one theory which I am partial to. Credit goes to Kip Thorne's Black Holes, White holes, and Worm Holes. A little dated, but still relevant.
And in case you missed it, nonlinear time travel can be done by traveling through a worm hole as the bridge connects two points on the space-time plane.
A black hole is the product of a supernova collapsing on itself, a very, VERY dense ball of matter that can absorb light. Reverse time travel is impossible, and forward time travel can only be achieved (at a useful pace) with near-light speeds, but theoretically, time dilation would cause the viewing of both the universe beginning and ending.
Hypothesis: The apparent condensation of all matter would imply a rapid rise in heat. The fact that objects inside a black hole appear to fall inward towards infinity leads me to believe that they are collapsing towards a certain point in space time. Could this point in space time be the birth of a new universe which results from a big bang - esque event that is caused by the infinite collapse of matter inside a black hole?
>>595577326 Black Holes have been proven to exist because we have observed stars orbit empty spaces. These empty spaces that these stars are orbiting must contain matter since thety have gravitational influece on other stars. This is how black holes have been proven to exist. We can take a picture of a black hole but you will jsut see empty space since by definition, light cant escape this object.
A black hole is a tiny point in space where a star's mass and gravity has over-powered it's strong-nuclear force, causing the matter in the star to retreat within it's own schwarzschild radius.
If observing Einstein's general relativity, one could theorize that an object of such small size yet such great mass could tear the fabric of space-time, space-time being an interwoven entity that permeates all points in space. To travel through a black hole would require a vessel capable of withstanding the most powerful destructive forces in the universe, or at the very least countering the massive gravity of a black hole with theoretical and undiscovered 'Gravitons'.
The matter on a star begins to develop into steel which is heavy so it eventually caves in on itself and when something the size of a planet begins to compress itself, there is a lot of pressure to the point where matter can no longer exist and the force becomes so great that it even pulls light in which makes it appear black.
>>595572274 A black hole is the result of the collapse of a high mass star due to it's own gravity once it's hydrogen reserves have depleted. The result is a gravitational singularity. A super dense object, that due to its extreme density, generates an extremely strong gravitational field, strong enough that nothing, not even light, can escape from past the event horizon.
>>595578044 god fuck, i ate pictures like these. Heavenly bodies are fucking far apart, they are never this close, ever. Not even the moon is that close, its fucking 30 earth widths away to give yo usome reference. Fuck
>>595575220 dumb shit you do not get stretched like in all the cartoons or whatever. an observer would just see you simply frozen, while you start to fade into nothingness. you know why? cause a black hole is so dense it almost makes a hole in the fabric of space time, thus the person close to it will experience huge time dilation, until time basically stops. after that, no one knows.
>>595572274 people think we could time travel through black holes if they might act as wormholes and transport us to another place in space time, however that is not proven and most likely to be untrue, since black holes destroy everything.
>>595579717 i don't really have a link to it other than the theories that describe it. it's the only thing that makes sense with relativity and gravity. the big bang, which caused the expansion in the first place, also is the cause of time. nothing existed before it because we can't talk about a before without time.
>>595572274 You can't time travel through one. When in close proximity to a massive object, time travels more slowly than if you were further away from a high density object. Anything with mass distorts space time, this is what creates gravity. On earth, you experience time more slowly than you would in orbit. Near a black hole, the effect is more noticeable, because of the higher density of the black hole, compared to Earth. Everything has always been travelling through time. But if you're talking about time travel in the sci-fi sense, you can't. You can just travel through time at different rates. if you got on a ship, and went in orbit of a black hole, and came back. Everyone on Earth with stop clocks would say you'd been gone for 10 years, let's say. But the stop clock you took with you, reads a bit less than that, because you've been in a region of space where time passes more slowly.
a black hole is a quantum singularity, a place where the universal laws as we know them no longer apply. The occur when supermassive stars burn through their hydrogen and helium and their internal reactions can no longer resist their incredible gravity causing them to crush a few solar masses into a space smaller than an atom. We cant time travel through one. The end.
thing is, you can't travel through time "through" one. You can sit next to one and time will pass by very quickly out side of the gravity well, but from your perspective time is traveling as it always has.
>>595579753 Okay, let me reiterate. If you had passed the event horizon of a black hole, and shone a light back out to the event horizon, the light would not pass back out. Does that work for you? Of course light isn't scrambling to get away from the black hole..
>>595580182 Ok, any names of theories to look out for or authors who have written anything of the top of your head? I'm on the hunt for some new reading material. Time is always fascinating because we know so little about it
>>595579601 but you have to look at the comment he was replying to. the prior comment was stating that it was disproven, the guy in question said that theories can't be proven as a response, implying that they can also not be disproven. and theories can be proven, but then they are no longer theories. the theory of gravity was proven and now it is a law. the theory of evolution has not been proven but it is accepted as if it were, but its still just a theory.
Basically, there is a lot of activity on a star which over time causes it to explode and when something the size of a star explodes, there is a ton of combustion and matter cannot escape easily so the matter gets destroyed and becomes energy which mixes in with the light since thats also energy and since the light is no longer pure, it turns dark. Therefore, a black hole. Though its not technically a "hole", though that name from the popularized misconception that it can create a vortex to other places and even time periods.
>>595572274 Interstellars black hole wasnt entirely accurate >as you approach a black hole time slows down, significantly. Its like traveling 1/2 the distance to the wall, you technically never get there. For your persective you never get into the damn thing time just slows to zero really. Its pretty trippy. on top of that As you approach it you are stretched infinitly due to gravity. >therefore you can never actually get past the event horiozon.
>>595580825 A theory can never "advance to a law". A theory attempts to explain WHY something happens, a law explains HOW something happens. A law is an equation, a theory is a collection of concepts. The two are fundamentally different.
no they dont. Black holes are holes. Some light falls into them, some light is lensed around them, there's even a point inside the event horizon where light that hits at certain angles ORBIT the black hole. Technically black holes arent even perfect black bodies because they also emit light in the form of hawking radiation.
A dense motherfucker with loads'a mass. So much that it sucks in light.
The "time travel" would work because of time dilation: relative to you, the rest of the universe would speed by. Not sure of it's been disproven yet, but afaik most people think it would be impossible. (Not to mention impractical.)
>>595580872 They attract anything, light included. That doesn't mean light "fades" from an object. It's not like light is an intrinsic property of an object, like colour, or texture. It's just reflected waves.. If you were travelling towards a black hole, passed the event horizon and carried on falling, while holding a light on your hand, you wouldn't notice a difference. Your hand would still be illuminated. It's not black holes are dementors that steal the light from objects..
in 13.7 billion years there hasnt been enough time for much change to take place. The hubble ultra deep field shows that mere millions of years after the big bang took place there were galaxies that look almost identical to modern galaxies. The universe is a newborn baby, the doctor hasnt even spanked it in terms of it's lifespan, it's going to be several trillion years before heat death occurs.
>>595580683 a theory in science isn't just a hypothesis. it's taken basically on the same grounds as a law. it is able to be disproven, however if it has not been done so at this present moment then it is deemed 'truth'. although, that goes for science in general because nothing is truly objective.
it's the best model we have to explain the data we've observed. Welcome to science 101. There is no Proof with a capital P in science, just theories that explain the data that are falsifiable and havent been falsified yet.
Difficult to define in depth in such a broad context. There are different types of blackholes.
A general definition would be a highly compact region of space time possessing only three properties: mass, spin, and charge...You could also call it a singularity or a region of space time in which all future light cones generally point inwards towards a singularity.
Anons usually throw around pop Sci words like schwarzschild radius with no idea of what they mean. But it's a simple enough basic concept. The details is where the interesting things come about.
> time travel Time travel depends on certain stances as well as the specifics of the black hole. Further more there are different concepts of time travel to consider.
But that's enough for now as I'm done taking a shit.
After a supernova the leftover core of a star can become that shit cause that gravity too strong and the star collapses. Black hole is a point of singularity, light cant escape. According to Interstellar, you go through that shit and you become a ghost. Lel. Where do you go when you get sucked into it? idk. How do you time travel with it? Gravity so strong it bends space time and thus time can be "accelerated."
>>595581963 Heat death will not occur. It is one of the largely accepted theories, but it has been proven to be unlikely. The universe is expanding at a rate that is too fast for gravity to slow enough to reverse, and if that never happens, it will continue to expand.
there will be trillions of years where the only objects in the universe are black holes all slowly bleeding mass through hawking radiation, so far apart that they never interact on any real level. Then, eventually, all that will be left is elementary particles all spaces equidistantly with zero energy of any kind. Perfect entropy, a cold and black universe with nothing happening in it, forever. The universe will spend most of it's life on the slow decline to senility before finally dying, cold and alone. Happy birthday, kids!
>>595582547 Is that not what heat death is? The universe will continue to expand, until the energy density will become so low, that nothing ever really happens? And all the hydrogen is fused, so no new stars form..
that's what heat death is, friend. The total loss of all heat in the universe because it continues to expand. It's the most probable outcome given the data we have showing the universal expansion is accelerating.
I didnt say it was true, I said it was the best model we have to fit the data. Hawking radiation was observed in 2010, friend. What's your alternative theory that's more believable and has more evidence than hawking radiation, bud?
>>595582799 False. There is still space inside the event horizon's sphere. The event horizon is just a sphere shaped area in space. Once you pass it, nothing different happens, it just means, you or anything you project, light included won't ever be able to go further away from the black hole than the scwarzchild radius (the event horizon)
>>595581706 Yes, you can prove things through math and logic. The reason that a theory cannot be proven is because there is a gap between our observations and the math that we apply to it.
One example you gave is relativity, I'll address that one as it is the one I am most familiar with.
You can get in a plane and fly around the earth and observe time dilation. You can watch an eclipse and see that the path of the stars is shifted by the gravity of the sun. And we can build our theories on that, but you cannot prove 100% the reason we observe that to happen.
I don't claim to be an expert, but I believe that once you get into particle interactions and start working with Feynman diagrams, you find that the theory of relativity is not complete.
>>595581357 >>595581668 a black holes gravitational pull is so strong that even light can't escape. if you were watching someone fall into a black hole, you would see them getting close and close to the event horizon south out them ever crossing it. as this happens, the light will be redshifted and the person will appear dimmer and redder until they just freeze.
so you're high as shit and have no idea what you're talking about but you dont feel the need to justify anything you think other than "sounds good to me". Congratulations, you're a young earth creationist!
>>595572274 A black hole is a singularity with a mass that is so large that light cannot escape it's gravitational well. The event horizon is the point where light is still visible and anything close falls into the black hole which is why we see no light at the center. As for time travel it's up for debate but I would imagine that it creates a hole through space that functions as a tunnel from one end of space to another. Hard to say though
I'm aware that there's the photosphere around a black hole, but can light come closer to the black hole than the radius of the photosphere? How is light incorporated into the black hole itself, is the singularity just a mix of matter and energy, or do the two amalgamate into the same thing? -Mass/energy equivalence..
einstein's physics sort of predicted their existence
big talk-talk in the 1970s, some astronomers serious about it, sort of ostracised by their fellows, but made big headway in science fantasy
then we discovered proof of them, more physics, then we're finding them everywhere and at the cores of every galaxy--'seyfert' galaxies were identical to quasars which were identical to 'feeding' supermassive black holes at galactic cores
when supermassive stars self-destruct, they go supernova, blowing their outer layers apart while the core implodes, the gravity ratcheting up and pulling the core into a singularity, where not even light can escape
whether or not it's an actual 'wormhole', we don't know yet
stephen hawking's mish-mash of physics on the phenomenon have been entirely discredited
according to the boys who go into multi-dimensional tantra over 'branes or string theories, sub-atomic black holes form and vanish with microseconds all over the place, so we're largely talking about stellar or supermassive black holes
>>595583612 You can't honestly be this stupid. Stars radiate energy through nuclear fusion. Larger stars generate smaller wavelengths and thus more energy. You can tell which stars radiate more energy (Blue end is high energy but don't last long, red is low energy but last for millions of years) This also explains why you see mostly red stars looking into the sky.
A black hole is a point in space of infinite density which converges at a singularity. Because it has so much gravity it not only can stop light from escaping ( that point is called the event horizon) it can also bend time itself. So if you were to orbit a black hole close to it, the time closer to the black hole is slower than the time further away so if you stay there long enough you would have travelled in time.
A black hole is a singularity of infinite mass and density. The blackness that allows us to identify a black hole is due to the gravity well it creates that is so steep light cannot escape after crossing a certain point known as the event horizon. I could keep going on about this but the idea behind time travel is that the mathematical equations that describe a black hole can be reversed, this in theory would create an area in space in which mass cannot exists (ie. it spits everything out). It has been dubbed a white hole. Now if a black hole is charged (most of them probably are) it will be spinning or orbiting a small space that theoretically could be a tear in space which connects with that black holes specific counterpart white hole which could exist at any moment in time and would only exist at that moment in time and no other. Three cosmetology classes in college and 2 research papers specifically on black holes. Now I will explain why, though theoretically possible humans will never be able to do it. One even if you could somehow survive the gravity well and get into the wormhole, the size of the wormhole would be less than the size of the black hole itself and would be filled with enough radiation to make a supernova look like a pussy. More likely would be the use of black holes to travel over great distances very quickly.
A black hole is a single point in space, where matter is so dense that it forms a singularity. The gravity produced by this singularity is so intense, that not even light cannot escape it. Hence the name "black hole". We are only able to detect the black holes by how the gravity affects the light of other objects.
We can time travel with black holes with something called time dilation. Time and space are one. Therefore, the gravity that we see affect space must in turn affect time. So it theory, if gravity is intense enough, we should be able to go forward in time.
>>595584966 no, heat death is the big crunch, gravity causing galaxies and stars and all the matter in the universe to crunch back into a singularity the way it was before the big bang. So much shit smashing together causing extreme heat and radiation before disappearing into an apparent nothingness. Cold death is the universe expanding forever and stars eventually fading out due to using up all their fuel, but things being so far apart that nothing new can form from the expulsions. Eventually with the lack of new stars and light being generated in the universe, the overall temperature approaches and possibly achieves absolute zero kelvin. That's the difference, and it all depends on how much dark matter actually exists in the universe. Do your homework.
>>595572274 mass of dense star (white dwarf I think) creates gravitational pull that exceeds what the (fusion I think) reactions inside of the star can push out (no google means no technical terms for me). matter of star is pulled in, making a really dense bit of matter with gravity so strong that even light is pulled in.
please correct me if I'm wrong, I don't like being wrong.
suns and planets operate the same as a black hole, just in a much lower level. the density of the sun creates an area that is causing expansion to be slightly less than the surrounding space. when you travel fast enough to escape this affect, you are then in an area of space expanding faster than the gravity of the sun you escaped from allows, which is why time seems to flow differently.
>>595572948 there are 4 dimentions x,y,z, and time this is why cosmolgists call it spacetime the reason we treat these as the same thing is because we know that energy bends time and since E=MC^2 as the mass increases the energy increases therefore mass is also capable of bending time. we know this is true because it is shown that no matter where you are or how fast you are going two observers will always measure the same speed of light.
>>595572948 technically you would be time traveling because the area around the singularity is exactly as it was when the black hole first formed, which could be a long time ago. but once you go away from it again, if you could, you'd be traveling right back to the "future" of the space around the black hole as it expanded culminating in you being in the present again, minus the time the black hole expanded which would of course correspond, relatively, to the time you spent beyond the event horizon.
A singularity - A one dimensional point of infinitesimal space/time curvature. The area contained with in the schwartzchild radius in unable to directly observed as all matter and light is pull towards the singularity.
a black hole in broad terms is a body in space whose escape velocity is equal to or greater than the speed of light therefore it may not emit any light at all however stephen hawking proved that the pairs of virtual particles do split next to the black hole and emit some radiation so black holes are technically not really black. they do emit some light
>>595585980 m'kay so i got one term wrong, heat death meaning equilibrium but it is NOT the same as cold death as stated before. They are two very different theories on the end of the universe, among many others. I acknowledge my ignorance on the meaning of the one term but my point remains that they are not the same.
This concept is quite different from what is commonly referred to as 'cold death.' 'Cold death' is when the universe continues to expand forever. Because of this expansion, the universe continues to cool down. Eventually, the universe will be too cold to support any life, it will end in a whimper. The opposite of 'cold death,' as you can see, is NOT 'heat death,' but actually the 'big crunch.' The 'big crunch' occurs when the universe has enough matter density to contract back on itself, eventually shrinking to a point. This shrinking will cause the temperature to rise, resulting in a very hot end of the universe.
yes, you judged a stranger for being wrong about something that you yourself were wrong about. Check your facts next time. Heat death is the most likely end to our universe, the only way it could be circumvented now is by the "big rip" being found to be true or the current accelerating expansion our universe is undergoing being found to be transitory like the initial inflation event that took place 10^-36 seconds after the big bang.
>>595588176 i judged a stranger for being wrong WHILE being mistaken myself yes. Though my facts on definitions was wrong, my point was not. They stated that heat death and cold death were the same, they are not.
>>595588330 it would be no different to you beyond the event horizon. there isn't any special effects involved. additionally, a person watching from outside would never see you enter it. but once beyond, to you, nothing wold look much different. it isn't all of a sudden going to be black around you or anything.
If a black hole was capable of inter-dimensional time travel, wouldn't there need to be a counterpart? Couldn't one argue that the center of our universe is the remains of a "white hole", a point in space which repels everything in the universe?
>>595589003 there is a center, it's just not in linear space. it's like the old balloon example. even though the surface of the balloon has no center, there is a center of the balloon around which it's all expanding.
Theoretically if you can calculate the correct trajectory, with enough force, you can circle a black hole and will indeed travel forward into time. Of course this is only in theory, it will probably be another hundred years before we can actually send a probe to one to get enough data to figure out it's not possible.
>>595585389 Nothing special about black holes and time dilation, aside from the severity. We're all experiencing time dilation now on Earth. Just a clarification.
Also black holes are all 'trying' to evaporate, via Hawking radiation. What has been stopping them has been the CMB, radiation that permeates all space. It's hotter than the black hole, thus a net gain in the black hole's mass.
>>595581259 as you approach a black hole's event horizon, in your frame of reference everything is normal except all the stars around you get massively blueshifted. you pass the event horizon without even noticing.
to an outside observer, you appear to slow down and are redshifted and more redshifted until your image eventually fades away. so an outside observer cannot witness you crossing the event horizon, even though you're happily cruising through until you become spaghetti.
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