sees Shenzhou 14 astronaut successfully returns to Earth.
can't help but remind people of In 2003, the first person to travel in space in my country, Yang Liwei, an exciting moment when he returned from space.
Yang Liwei returns to Earth
However, it is worth mentioning that although Yang Liwei's return is extremely exciting, , friends who carefully watched the live broadcast screen back then should have noticed one thing.
When Yang Liwei left the return capsule, there was obvious blood stains on the corner of his mouth.
Yang Liwei had blood on the corner of his mouth
Later, Yang Liwei also revealed a very strange thing to the outside world, He said that during his stay in space, he heard a mysterious "knock" ...
So, what did Yang Liwei experience in his space journey back then? Is the blood on the corners of the mouth also related to the mysterious "knocking" of the universe?
Bloodstains at the corner of Yang Liwei's mouth
Let's talk about the bloodstains at the corner of Yang Liwei's mouth first.
There is blood in the corner of Yang Liwei's mouth
It is not difficult to see from the photos that there is indeed blood in the corner of Yang Liwei's mouth .
Later, relevant personnel also responded positively at this time, Yang Liwei did encounter an unexpected situation.
However, it is worth mentioning that although the blood on the corner of Yang Liwei's mouth was caused by an accident, it is not related to the mysterious "knocking" in space.
Yang Liwei
It is reported that when Yang Liwei was landing in the return capsule , after passed through the dense atmosphere, the parachute in the return capsule actually had damaged .
You should know that the parachutes in the return capsule are usually opened about 10 kilometers away from the ground. The consequences of damage to the parachute can be said to be quite serious.
The speed of the return capsule is about 200m/s at this time, and the deceleration effect caused by the damage of the parachute will be greatly reduced.
Return capsule landing
Even if the device at the bottom of the return capsule has reverse thrust engine , it can play a reverse thrust reduction to a certain extent, but compared with the deceleration effect of the parachute, it is not ideal enough.
Due to the damage to the parachute, Yang Liwei's return capsule fell sharply. Even with the help of the reverse thrust engine, was still bounced up the moment it landed. It fell again the second time, and then it hit the ground heavily and successfully landed .
Yang Liwei was also injured when the return capsule fell and bounced up.
Yang Liwei was injured
At that time, in order to facilitate contact with the ground control personnel, Yang Liwei wore headset on his head.
The moment the return capsule fell violently and bounced up, the huge inertia caused Yang Liwei's body to shake violently. During the violent shaking, the slack headsets cut through the corner of his mouth.
Yang Liwei's headset
Fortunately, it was cut by Yang Liwei's corner of his mouth. If scratched his neck, the consequences would be absolutely unimaginable...
The mysterious "knocking" that Yang Liwei heard in space
Let's talk about the mysterious "knocking" that Yang Liwei heard in space .
Yang Liwei
According to Yang Liwei's later statement, when he entered space, was normal at first, everything was as expected.
However, after a while, Yang Liwei suddenly heard a dull sound, like a "knock on the door". thought he had an illusion, so Yang Liwei didn't care too much.
Yang Liwei entered space
But when he was resting, everything calmed down, and he could only hear his heartbeat. When the electrical equipment in the spacecraft cabin was slightly clamoring, "knocking" came again, dong, dong, dong.
Yang Liwei was relatively calm at the time, so he decided to make sure.
Yang Liwei
But soon after, the "knock" of sounded again, and the sounding position was different, as if it was a sound coming from all directions.
Yang Liwei was scared and thought, could be an alien?
Alien
Until Yang Liwei completed this space flight mission and returned to Earth, his hanging heart was relieved.
And when he informed the relevant scientific researchers about this, they were also shocked.
Yang Liwei
Yang Liwei later described it like this:
"This sound suddenly appeared, not always ringing, but in waves, no matter how time, day and night, there is no pattern at all, I don't know when it sounds a few times. It's neither the sound coming from outside nor the sound inside the spacecraft, but as if someone was knocking on the hull of the spacecraft outside."
Because of this situation, no one has ever encountered it, and no relevant reports have been heard abroad. This matter became a "unanctuary" at that time ...
13 years later, experts finally found the reason
It was not until 13 years later, the chief designer of "htmlJanuary Palace No. 1 " Liu Hong , and finally found the reason.
"Yuegong No. 1" chief designer Liu Hong
It turns out that the sound Yang Liwei heard in space back then was not a "knocking sound", but an abnormal sound made by the spacecraft itself .
Space is a vacuum, microgravity environment. The air pressure here is completely different from the air pressure on the earth. After the spacecraft enters space, it must adapt to the space environment, and the pressure in the cabin will change to a certain extent at this time. The materials on the inner wall of the spacecraft cabin will undergo slight deformation due to changes in the pressure in the cabin.
Mysterious "knocking" revealed
So the mysterious "knocking" that Yang Liwei heard is actually the sound of slight deformation of the material on the inner wall of the spacecraft cabin...
So far, this "unsolved case" that has troubled countless people, including Yang Liwei for 13 years, has finally come to light.
was written at the end
. Although the result is somewhat unexpected, isn’t this the charm of science?
Yang Liwei in space
All seemingly unsolvable and fantasy mysterious events, the scientific principles hidden behind them may be the most basic common sense of life.
Sometimes scientifically cannot be explained, it is just because we have not found the correct "problem solution". The reason may be simpler than we imagined...
Yang Liwei was scared and thought, could be an alien?
Alien
Until Yang Liwei completed this space flight mission and returned to Earth, his hanging heart was relieved.
And when he informed the relevant scientific researchers about this, they were also shocked.
Yang Liwei
Yang Liwei later described it like this:
"This sound suddenly appeared, not always ringing, but in waves, no matter how time, day and night, there is no pattern at all, I don't know when it sounds a few times. It's neither the sound coming from outside nor the sound inside the spacecraft, but as if someone was knocking on the hull of the spacecraft outside."
Because of this situation, no one has ever encountered it, and no relevant reports have been heard abroad. This matter became a "unanctuary" at that time ...
13 years later, experts finally found the reason
It was not until 13 years later, the chief designer of "htmlJanuary Palace No. 1 " Liu Hong , and finally found the reason.
"Yuegong No. 1" chief designer Liu Hong
It turns out that the sound Yang Liwei heard in space back then was not a "knocking sound", but an abnormal sound made by the spacecraft itself .
Space is a vacuum, microgravity environment. The air pressure here is completely different from the air pressure on the earth. After the spacecraft enters space, it must adapt to the space environment, and the pressure in the cabin will change to a certain extent at this time. The materials on the inner wall of the spacecraft cabin will undergo slight deformation due to changes in the pressure in the cabin.
Mysterious "knocking" revealed
So the mysterious "knocking" that Yang Liwei heard is actually the sound of slight deformation of the material on the inner wall of the spacecraft cabin...
So far, this "unsolved case" that has troubled countless people, including Yang Liwei for 13 years, has finally come to light.
was written at the end
. Although the result is somewhat unexpected, isn’t this the charm of science?
Yang Liwei in space
All seemingly unsolvable and fantasy mysterious events, the scientific principles hidden behind them may be the most basic common sense of life.
Sometimes scientifically cannot be explained, it is just because we have not found the correct "problem solution". The reason may be simpler than we imagined...
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