What will happen to humans when sucked into a black hole?


ByNASA Goddard Space Flight Center

Black HoleIs a dense and massive celestial body that has strong gravity to inhale not only matter but even light. Science writer's mystery as to what will happen if human beings drop into such black holesAmanda GefterIs approaching. Apparently, it is not "an immediate death", it seems that an unexpectedly strange event will occur.

BBC - Earth - The strange fate of a person falling into a black hole
http://www.bbc.com/earth/story/20150525-a-black-hole-would-clone-you


The answer to the question "Anything will happen if a human falls into the black hole" that everyone thought might be "crushed" or "shredded" It is becoming a reality that is more than a common answer.

When falling into a black hole, it seems that humans divide into two, one immediately burns to ash and the other intact remains in the black hole.


◆ What is a black hole in the first place?
The black hole is a place where the laws of physics that human beings have unveiled collapse. The center part of the black hole is a black circle, which isEarthquake of events(Schwarzschild face) is called. A very strong gravitational field is formed here, and a speed faster than the speed of light is required to escape. Because even light is sucked in, the black hole becomes a black body and it is difficult to observe directly. In other words, the image of "black hole photos" that you see often is a model image of a black hole created from a physics perspective rather than a photo.

Also, the ground plane of the black hole event is burning, it is thought that the flow of particles that burns due to the quantum effect is diffusing into the universe. this isHawking radiationIt shows the thermal radiation generated from a black hole called "black hole", but when enough time passes, the black hole seems to erase all the mass and radiate.

And deep inside the black hole there is a place called the singular point to infinitely twist the spacetime. The singular point of the black hole is density and gravity diverge to infinity, it is just unknown place that does not apply to the law of physics or everything, and no one knows what will happen here .


What happens when sucked into a black hole?
Simulation on the outline of the black hole, the next is simulation of what happens when actually sucked into the black hole.

· Observe human being sucked into the black hole from a position sufficiently away from the black hole
First of all, we simulate how it looks when observing human being sucked into the black hole from a position sufficiently away from the black hole.

Suppose you observe a fictitious character named "Masaru" that is sucked into a black hole from a safe position outside the black hole. Initially, Masayura is floating in space, but from there we will approach and gradually accelerate towards the plane of the event. The closer you get to the black hole, the more you can see the body growing and distorting, which seems to be as if you are watching over a huge magnifying glass. And as Masato further approaches the ground of the event, the movement will gradually slow down.

At this time, since it is an event in outer space, there is no air and I can not give a voice, but I may be able to ask for help from the light by using light. However, the closer to the black hole it appears to move slowly from the outside as it gets closer, so even if Masato sends the message "Please help!" With light, "... ... ... ... ... ... It seems that it will be a very long message such as "... ............".

And at the end of the event you arrive at the event ground. When you come here, from the side you are observing from the outside it seems that it looks as if you are stopped just as if you pushed the pause button with the distorted state on the guyagguia. And it is possible to observe the appearance that it is very slowly falling to ash due to the heat of the walking radiation coming out of the plane of the event than the most stopped state.


· The world seen from the human side being sucked into the black hole
On the other hand, how will the surrounding world change when you are sucked into the black hole?

When you approach straight towards the black hole, you will not feel the shock or shake, your own body will not be distorted by the Guignaguna as seen from the outside, the time will be slowed, the Hawking radiation There seems to be no such thing as the body burning with heat. It is because it falls freely toward the black hole, and the person who falls does not feel gravity.

Looking from the outside, it seems that there is a wall on the plane of the event, but it seems that the wall actually does not exist. When the size of the black hole is small, the gravitational force applied to the human head and legs on the plane of the event will differ greatly, so the body will be stretched vertically like pasta noodles. However, if the size of the black hole is millions times larger than the sun, the difference in gravitational force on the head and foot becomes negligibly small, so in a black hole of sufficiently large size it forms a normal body It is possible to fall to a singular point while doing.


◆ Black Hole Information Paradox
When you observe the way you are sucked into the black hole from the outside, it surely appears to the observer side that the body above the plane of the event burns out. This is not a hallucination, it is even possible to gather misfortune and mourn. From the quantum mechanics point of view, observing a person who is sucked into the black hole from the outside, it seems that all information constituting the very same will stop outside the plane of the event.

On the other hand, the side sucked into the black hole actually can not easily burn out on the plane of the event, considering Einstein's general relativity theory. In other words, if you are sucked into a black hole, if you follow two of general relativity and quantum mechanics, you need to have the same human being inside and outside the black hole at the same time. Physicists will use this phenomenon as "Black Hole Information ParadoxI call it.

However, how to clarify the black hole information paradox was discovered in the 1990 's. What I found was a scholar named Leonard · Juice Kint, which means that no one can see the other one in the black hole, so that the paradox will not occur. In other words, if you are observing from the outside that you are entering the black hole, it is very natural for the observer to disappear, and it is very natural that it will not go away for the very same person, People who are observing from the black hole can not see inside the black hole, so it is impossible to see the outside of the black hole from the very side, so the physical law is never broken.


In addition, thinking experiments to elucidate the black hole information paradox are carried out by four physicists, Ahmed Almheiri, Donald Marol, Jo · Portimsky, James · Sally, in the summer of 2012, four are event On the ground planeFirewallIt is assumed that there exists.


After all, there is still a big mystery about the black hole still, and no one knows what will happen if it is sucked into the black hole.

The scientific mysteries that have a prospect of elucidating are summarized in "Big Questions in ScienceIn books that say, "I do not know what is on the other side of the black hole,"A tool to investigate what is on the other side of the black hole has not been invented yet"It is described as.

in Science, Posted by logu_ii