On October 15, 2003, Shenzhou 5 was successfully launched, sending the astronaut Yang Liwei into space. This successful launch marks that China has become the third country capable of sending people to space alone after the former Soviet Union (now inherited by Russia) and the United States.
In space 343 kilometers from the ground, Yang Liwei heard the sound of "Boom, boom, boom, boom!", Yang Liwei heard this voice from time to time when he was flying on the "Shenzhou V" spacecraft . , As if someone was knocking on the door.
Yang Liwei lay on the porthole, listening and watching, trying to find out where the noise was, but found nothing. And no problems were found inside the spacecraft...
Yang Liwei described this mysterious voice in an interview with CCTV:
, "This voice is indescribable, not a ding-ding, nor a proper one, but more like a wooden hammer. The sound of knocking on the iron barrel...boom...boom...boom...boom..."
Yang Liwei's description aroused the curiosity of many experts, whether Yang Liwei had a hallucination or really heard the voice. At that time, technicians used various methods to simulate it according to Yang Liwei's description, holding the recording to let Yang Liwei listen to it again and again, but Yang Liwei always listened differently.
is not the first time there are strange sounds
Because the transmission of sound waves requires a medium, space should be absolutely quiet. The transmission of sound requires media, such as air particles or water molecules or solid metal atoms, thunder sound transmitted through the air, sound transmitted underwater, and sound transmitted by solid musical instruments, etc.
But Yang Liwei was not the only one who heard strange sounds in space. In 1969, the Apollo 10 was launched, which was the first time that humans carried a complete set of Apollo spacecraft (Apollo 8 did not carry the lunar module) Orbiting the moon, this is also a test flight of NASA to orbit the moon for the implementation of the moon landing plan.
When the spacecraft was in a position on the back of the moon that cut contact with the earth, astronaut Eugene Andrew Cernan heard an unexplainable strange sound. Astronauts claimed this whistle as " universe music".
This is their conversation at the time:
Cernan: "This sound is so strange, it has never been heard before, like music from space, no one will believe what we heard."
John Young:" Do we need to tell Houston about this?”
Cernan: “I don’t know now, I think we should think about it.”
NASA also recorded similar voices during subsequent missions. NASA has published the sound recorded by the Juno probe orbiting Jupiter.
These sounds have not yet been able to get an exact explanation, some scientists believe that this is some kind of radio signal interference.
The chief designer of Moon Palace No. 1 gave an explanation
11 years later, the chief designer of Moon Palace No. 1 gave an explanation, and the mystery was finally revealed. "Yue Gong No. 1" is a four-biological chain artificial closed ecosystem of "human-plant-animal-microorganism", described in popular language, is a self-sufficient micro-biosphere. The growth of plants releases oxygen to provide food for astronauts, and then provides nutrients for plants through metabolism.
"Yue Gong No. 1" is the first comprehensive closed test system established in my country and the third in the world for the foundation of bio-renewable life support. The core of "Yue Gong No. 1" is the Bio-Renewable Life Support System (BLSS). This is the most advanced closed-loop life support technology in the world, and it is also the core technology for humans to achieve long-term survival in outer space. After space, this system can make the aircraft no longer need or rarely need ground material support. Oxygen, water and food are regenerated through biotechnology in the system. Astronauts can work and live in space for a long time, making it possible for long-term manned space flight and planet Detection becomes possible.
"Moon Palace One" in 20Before the 105-day long-term experiment from October 19, 2013 to January 23, 2014, the staff heard the sound of bang and bang in the cabin similar to those described above, thinking that someone was knocking on the cabin outside. The staff looked around, but no one knocked. Everyone was very nervous and began to analyze and check where the sound came from. Z7z
later discovered through research that it is the sound produced by the small deformation of the cabin inner wall material when the cabin pressure changes. However, these deformations have no effect on the safety of the cabin and are normal.
You must know that the temperature in the cabin is not static and will change with changes in various factors such as the environment; changes in the temperature in the cabin will cause the pressure in the cabin to change; and the inner wall material of the cabin will change A slight deformation occurs due to pressure changes in the cabin: when the pressure difference between the inside and outside of increases, it deforms outward, and when it decreases, it deforms inward, resulting in a banging sound, which sounds like a wooden hammer on the cabin outside. feel.
The same is true for spaceships. Spaceships are closed cabins with high airtightness. In order to ensure the normal life of people in the closed cabins, the temperature in the cabin is regulated, so the pressure in the cabin will fluctuate . The environment of a spacecraft in space is complex and changeable, much more complicated than on the ground. The possibility of sound generated by the deformation of the cabin material is great.
In 2016, Yang Liwei also affirmed this statement:
"I understand that there will be more or less sound every time we fly, maybe because our spacecraft is under pressure when it is on the ground. Space is a vacuum. In a stress-free environment, there may be some changes in the structure, and some sounds will be produced."
Since then, this mysterious event that has plagued everyone for 13 years has finally had an answer.
Summary
On the way of humans exploring the universe, there will be various phenomena that humans cannot explain temporarily. We should not be afraid, but should pursue the scientific principles behind that phenomenon.
As the first person in China's aerospace industry, Yang Liwei, after hearing the strange sound, not only did not panic, but also showed extraordinary qualities. He was not disturbed by the sound and successfully returned to the voyage. You know, the deep and dark universe. In the silent solitude, astronauts are very sensitive to changes in sound. A slight movement in any part of the spacecraft will make people frighten—how can there be such a movement?
Yang Liwei is the first Chinese to go to space in China. He has no previous experience to learn from, and he can easily be affected by this sound and cause disaster. Being able not to be affected by this sudden sound has fully demonstrated Yang Liwei's wit and bravery. This voice also appeared during Shenzhou 6 and Shenzhou VII. Yang Liwei told the astronauts that there is no need to be afraid. Z3z is a normal phenomenon .
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