The history of human development is the history of human exploration. From the beginning of the land, and then the ocean, with the development of human civilization and technology, the Earth in our eyes continue to shed its mysterious veil.

Since the end of World War II, the world has entered a special period of the U.S.-Soviet Cold War, and with the two superpowers of that time constantly engaged in an arms race, mankind has set foot for the first time in the once unreachable realm - the universe.

The human exploration of the universe, the vast project, those researchers and technical personnel are to be credited, it is in their efforts we can learn the secrets of outer space, and equally great are those who went to outer space space space heroes.

Because the universe is always in a vacuum and absolute zero, that is, -273.15 ℃ environment, so how to protect the lives of astronauts has become a major problem, so what kind of situation will be faced in space without space suits?

Threats in the Universe

The average temperature of the human body is at 37 ℃, when the external temperature changes the human body will correspondingly make some changes to adapt to this change, always let the internal temperature in a relatively stable state, and when the temperature drops to a certain standard, the human body can not rely on itself to adapt, need to rely on external objects to stabilize their own state, if it can not balance will appear frostbite and other kinds of conditions.

When the human body is exposed to absolute zero conditions, because the molecules of the object in absolute zero does not make any movement, or even in a state of rest, in this case people will lose all senses in just a few seconds, and eventually die, and even in this process modern medicine can not play any role.

Therefore, in the face of the threat of absolute zero, both the astronauts and space equipment protection is very necessary, otherwise for the astronauts, the magnificent space project is like an "iron coffin" general, simply can not play its use of space exploration.

Humans live in the earth's surface an atmospheric pressure, and the human body has the same pressure all the time to resist the external atmospheric pressure to maintain a balanced state, with the change in altitude pressure will also change, when people are in the basin and other areas of slightly higher pressure, will feel a touch of relief, and in doing similar to long-distance running and other sports will be more relaxed than elsewhere.

This is why deep in the Sichuan basin and the Xinjiang basin people's health will be better in one aspect of the reason, in turn, when people are in Tibet and other highland areas, people with poor health will soon be because of the low pressure of the plateau reaction to various symptoms, and even the threat of death.

When a person is in a vacuum state will lose the atmospheric pressure given by the outside world, while the body still exists an atmospheric pressure, in this unbalanced situation every part of the human body will be subject to enormous pressure, and such pressure is absolutely fatal.

At the same time in the vacuum state of human body fluids in the gas will be expanded (the scientific name is called body fluid boiling), the gas expansion will immediately destroy many organs, blood vessels, tissues, etc. in the human body, and finally the skin rose through.

At the same time in the absence of air pressure or spacesuit protection, the vacuum of the universe does not provide the oxygen on which humans depend, so lack of oxygen is also one of the threats posed by the vacuum of the universe.

The universe is filled with all kinds of charged high-energy sub-atomic particles and travels at nearly the speed of light, as well as X-rays, gamma rays, etc., which are invariably fatal to the human body.

The sun provides heat to humans, but if we lose the protection of the atmosphere, the human body is directly exposed to the sun's rays will soon take away human life.

Therefore, for astronauts, spacesuits are essential, otherwise any kind of threat to them is fatal, each astronaut is a hero of humanity and priceless treasure, the loss of any one of them is the loss of all mankind, in order to avoid the tragedy of the three Soviet space heroes, the development of spacesuits and reasonable use are very necessary.

Tragic History

Mankind in the process of space exploration is not always smooth, not from the beginning can be as perfect as today to protect astronauts, the history of astronauts tragedy has also happened.

After the end of World War II, during the arms race between the United States and the Soviet Union, there were three former Soviet cosmonauts who were forced not to wear spacesuits into space because of the weight limit of the spacecraft, and when they completed their mission to return to Earth when the space station was separated by a serious accident, resulting in three people in the absence of spacesuits directly exposed to the cosmic environment, and eventually lost their lives due to boiling body fluids in just forty seconds or so.

Although there were many similar incidents at that particular time when the two superpowers were competing with each other for supremacy (for example, the crash of Apollo 13 in 1970), every space accident that occurred at that time has provided some learning implications for future generations.

For example, this incident made the international community realize the importance of space suits, and they have invested in the development of space suits, and China's space field has come a long way after summing up the mistakes made by its predecessors.

No further details about the incident are available, but there is no doubt that these three former Soviet cosmonauts gave their lives to add a barrier to the lives of later astronauts.

Development of space suits

The first spacesuit in human history was the one worn by Yuri Gagarin of the former Soviet Union when he orbited the Earth on April 12, 1961 in the Vostok-1 spacecraft. The spacesuit at this time was a fully pressurized suit made of nylon as well as metallic aluminum, and although it was too modest as an opinion spacesuit, with only a life support system and pressurized design, it provided a clear design idea for later generations of spacesuits.

In May of the same year, the United States opened the "Freedom VII" manned Mercury spacecraft in order not to lag behind the former Soviet Union, and at this time the astronauts wore spacesuits of significantly improved quality, already able to withstand ultraviolet light and thermal radiation in space, both of which were significant days for the history of human spaceflight, and they have left a wealth of reference value for future generations.

However, the suits of this period did not support the movement of astronauts out of the capsule in the universe until March 1365, when the Berkut (buzzard) suit worn by cosmonaut Alexei Leonov improved the functionality of the suit and allowed the astronauts to walk out of the capsule in space.

Of course, the space suits at this time still had great drawbacks, such as the design did not take into account the expansion of the jacket led to the near death of astronauts, after learning from the experience of buzzards, the United States in Apollo 11 before the moon developed the second generation of space suits, more adapted to the cosmic environment (the second generation of space suits were not put into action on the moon).

It was not until the introduction of the third generation of spacesuits worn during the Apollo moon landings on July 20, 1969, that the modern spacesuit system was really completed.

Summary.

The journey of human exploration is never smooth, after countless trials and sacrifices step by step to the present, and China's space industry is formally built on the basis of countless failures of previous generations, so that we can avoid those serious safety accidents that have occurred in history, and all the way to the top.

We hope to see safer and more functional spacesuits to protect our space heroes in the future of spaceflight.