The first black hole discovered by astronomers was Cygnus X-1, whose existence can be detected by X-rays. The temperature of the black hole itself is very low, only tens of thousands of degrees, but the temperature of the accretion disk around it is very high, which can reach 100 million degrees.
Every black hole has its own event horizon. As the name suggests, the so-called event horizon refers to the “demarcation line of events”. Outside the event horizon, various events are constantly being staged, and once the event horizon is crossed, the event does not exist or does not exist. meaningful.
In layman’s terms, once you cross the event horizon of a black hole, it is equivalent to entering another world, where everything cannot be measured by the physical laws of the real world.
So, if you accidentally fell into a black hole, what would you see?
For you, the strong gravitational force of the black hole will not make you experience time slowing down, you will still feel that your time is passing as usual, but as you get closer to the black hole, the strong tidal gravity of the black hole will completely you shred.
And, because black holes have a huge gravitational pull, small differences in distance can lead to completely different gravitational forces. For example, if your feet approach a black hole first, the gravitational force on your feet is significantly greater than that on your head. At this time, your feet and legs will be stretched by the strong gravitational force of the black hole first, followed by your upper body.
The result is that you will become longer and longer like noodles, and finally be completely torn apart by the powerful gravity of the black hole.
But to outside observers, they won’t see all of this because you and outside observers don’t have the same rate of time passing.
External observers will see that your time is getting slower and slower. When you reach the event horizon of the black hole, your time is still, and your entire picture is still, just like a photo, forever frozen There, motionless.
When you fall into a supermassive black hole, because of the large event horizon of the supermassive black hole, you will not be torn apart by gravity, and you will eventually fall into the black hole. And in the process of crossing the event horizon, the past time will appear in front of you, and even the entire evolutionary history of the universe, because the strong gravitational force of black holes can distort space-time, and even make the structure of space-time form a loop.
No one knows what you will see when you fall into the event horizon of a black hole, because the laws of nature we know will all fail once they cross the event horizon.
Scientists suspect that black holes are likely to lead to another world that may have completely different laws of nature than ours.
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