On October 15, 2003, Shenzhou 5 successfully launched, sending astronaut Yang Liwei into space. This successful launch marks that China has become the third country after the former Soviet Union (now inherited by Russia) and the United States that has the ability to send people into space on its own.
In the space of 343 kilometers from the ground, Yang Liwei heard the sound of "dong, dong, dong, dong!", Yang Liwei heard this sound from time to time when he was flying in space on the "Shenzhou 5" spacecraft , as if someone was knocking on the door.
Yang Liwei was lying on the porthole, listening and watching, trying to find out where the noise was, but found nothing. And no problem was found inside the spacecraft...
Yang Liwei described this mysterious sound in an interview with CCTV like this
"This sound is indescribable, not ding ding, nor dang dang, but more like holding a wooden hammer The sound of knocking on the iron barrel... dong... dong... dong... dong..."
Yang Liwei's description aroused the curiosity of many experts, whether Yang Liwei was hallucinating or really heard the sound. At that time, the technicians used various methods to simulate it according to Yang Liwei's description, and let Yang Liwei listen to it again and again with the recording, but Yang Liwei always didn't listen to it.
It is not the first time that strange sounds have appeared.
Because the transmission of sound waves requires a medium, space should be absolutely quiet. The propagation of sound requires a medium, such as air particles or water molecules or solid metal atoms, thunder through the air, underwater sound, and solid musical instruments, etc.
But Yang Liwei was not the only one who heard strange noises in space. In 1969, Apollo 10 was launched, which was the first time that humans carried a complete set of Apollo spacecraft (Apollo 8 did not carry a lunar module) Around the moon, this is also a test flight of NASA around the moon for the implementation of the lunar landing program.
Astronaut Eugene Andrew Cernan heard strange and unexplainable noises while the spacecraft was in a position on the far side of the moon that cut off contact with Earth. Astronauts claim this whistle as " cosmic music".
Here's their conversation at the time:
Cernan: "It's a strange sound, never heard it before, like music from space, no one would believe what we heard."
John Young:" Do we need to tell Houston about this?"
Cernan: "I don't know right now, I think we should think about it."
NASA recorded similar sounds on subsequent missions, NASA has released the sound recorded by the Juno spacecraft orbiting Jupiter.
There is no definitive explanation for these sounds, and some scientists believe they are some kind of radio interference.
htmlThe chief designer of Moon Palace No. 1 gave an explanationhtmlAfter 2011, the chief designer of Moon Palace No. 1 gave an explanation, and the answer was finally revealed. "Moon Palace No. 1" is an artificial closed ecosystem with four biological chains of "human-plant-animal-microorganism". Described in popular language, it is a self-sufficient micro-biosphere. Oxygen is released through the growth of plants, providing food for astronauts, and then providing nutrients for plants through metabolism.
"Yuegong No. 1" is the first manned comprehensive airtight test system for biological regeneration life support established in my country and the third in the world.The core of "Moon Palace-1" is the biological regeneration 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 human beings 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 can be regenerated through biotechnology in the system, astronauts can work and live in space for a long time, making long-term manned spaceflight and planetary. Detection became possible.
Before the 105-day long-term experiment of "Yuegong No. 1" from October 19, 2013 to January 23, 2014, the staff in the cabin heard a knocking sound similar to the one described above. , I thought it was someone knocking the cabin outside, and the people outside looked around, but no one knocked. Everyone was very nervous, and began to analyze and check, where did the sound come from. The sound produced by slight deformation when the pressure changes. However, these deformations have no effect on the safety of the cabin, which is a normal phenomenon.
You must know that the temperature in the cabin is not static, and will change with the changes of various factors such as the environment. change; the change of the temperature in the cabin will cause the pressure in the cabin to change; and the inner wall material of the cabin will be slightly deformed due to the change of the pressure in the cabin: when the pressure difference between the inside and outside of the increases, it deforms outward, When it is reduced, it deforms inwardly, resulting in a thumping sound, which sounds similar to the feeling of a wooden hammer knocking on the cabin.
The same is true for spaceships. Spaceships are airtight and airtight cabins. In order to To ensure the normal life of people in a closed cabin, the temperature in the cabin is regulated, so the pressure in the cabin will also fluctuate. The spacecraft environment in space is complex and changeable, much more complicated than the ground.There is a high possibility that the deformation of the cabin material will produce sound.
In 2016, Yang Liwei also affirmed this statement:
"I understand that there will be more or less noise during each flight, probably because our spacecraft will have 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."
Since then, this mysterious event that has plagued everyone for 13 years has finally had an answer.
Summary
In , on the road of human exploration of the universe, there will be various phenomena that human beings cannot explain temporarily. We should not be afraid, but should pursue the scientific principles behind the phenomena.
As the first person in China's aerospace industry, Yang Liwei, after hearing the strange voice, not only did not panic, but also showed his extraordinary quality. He returned successfully without being disturbed by the voice. You know, the deep dark universe. In silent solitude, astronauts are very sensitive to sound changes. The slightest movement in the spaceship will make people tremble - how can there be such a movement?
Yang Liwei is also the first Chinese in China to go into space. He has no previous experience to learn from, and it is easy to be affected by this sound, which will cause disaster. Being able to not be affected by this sudden voice has fully demonstrated Yang Liwei's wit and bravery. This sound also appeared on Shenzhou 6 and Shenzhou 7. Yang Liwei told the astronauts, don't be afraid, is a normal phenomenon .
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-