Urgent Request! What does the air and space culture consist of?

The air force is a military service that takes the air force as the main body and conducts air struggle, air-to-ground struggle and ground-to-air struggle. It generally includes the air force, ground air defense force, radar force and other military types. Airborne troops are subordinate to the air force establishment. The air force has the ability of long-distance combat, high-speed maneuver and fierce assault, and can cooperate with the army and navy to fight, but also can fight independently.

The air force is a military branch that mainly conducts air combat. Most countries' air force consists of aviation, surface-to-air missiles, anti-aircraft artillery and radar, and some also have ground-to-ground strategic missile forces and airborne troops. The air force is usually equipped with fighter planes, bombers, fighter-bombers, strike planes, reconnaissance planes, transport planes, helicopters and other special planes. The basic tasks are: to undertake homeland air defense, to carry out air raids behind enemy lines, and to conduct airlift and aerial reconnaissance. A few countries have adopted a separate system of air force and air defense, and the air force does not undertake the task of homeland air defense. The air force has the capability of rapid reaction, high-speed maneuver, long-range combat and fierce assault. In the past quite a long period of time, the air force is mainly to support the army and navy combat. With the evolution of the level of equipment and technology and the pattern of war and combat style, the modern air force can not only carry out joint operations with other military branches, but also independently attempt campaigns and strategic missions, which have a significant impact on the course and outcome of the war, and have become an important strategic force in the modern national defense and high-tech local wars.

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[Edit Paragraph]Space Life

The environment of the universe is extremely harsh, and the main factors harmful to the human body are high vacuum, high lack of oxygen, cosmic radiation, temperature difference, etc. These unfavorable factors will cause serious harm to the human body. In this kind of environment, astronauts are unable to survive and work. In the face of the severe cosmic space environment, how can we ensure the life safety of astronauts? Our scientists and technicians have developed a closed environment that is basically isolated from the outside world, i.e., a closed cockpit, which is used to protect astronauts.

It's morning, it's night

It's been a longstanding habit of people to work at sunrise and rest at sunset, and sleep is usually arranged at night. The day-night cycle of a spacecraft in spaceflight is different from our day-night cycle on Earth. A day on Earth is one sunset and sunrise, and is set at 24 hours. A single sunset and sunrise during spaceflight has a different cycle length because it is related to the height of the spacecraft's orbit around the Earth. A high orbit results in a long day/night cycle; a low orbit results in a short day/night cycle. Spaceship space flight during the day and night cycle, day and night time length is not consistent, the day time is long, the night time is short, 90 minutes a day and night cycle, the longest night is only 37 minutes. When a spacecraft goes from the sunny side of the Earth into the shaded side, it is like going from daytime into dusk and night. The space shuttle is very fast, and when the sun comes up, it seems to leap out like a thunderbolt, and when the sun goes down, it quickly disappears like a whirlwind.

An astronaut once described a day in the universe as follows: In the morning, a computer-controlled clock wakes us up. When I woke up, I opened the curtains and looked at the cosmic space, the sun was shining and the sky was beautiful. But not long after, the sun is gone, the sky is dark, the night is coming, we think it's time to go to sleep again. It is really interesting, a moment is the morning, a moment is the night ......

Standing to sleep lying down to sleep are the same

In the universe of space is the most special is to sleep posture, weightlessness, the body is completely relaxed will naturally form a kind of bow posture. Aerospace experts believe that sleeping in space, the body slightly bent into a bow, than completely straight and lying flat to be much more comfortable.

Astronauts in space flight, the sleeping bag is generally fixed on the bulkhead in the spacecraft, if not, the posture in the spacecraft when the engine is on, it may collide with the bulkhead. Therefore, astronauts still generally prefer to sleep with their sleeping bags close to the bulkheads so that they are as comfortable as if they were sleeping in a bed. In weightlessness, anyway, can not distinguish between up and down, stand and lie down to sleep are the same, so the astronauts can sleep against the ceiling, but also can stand straight against the wall to sleep, want to how to sleep are available.

As people float in weightlessness, astronauts act with difficulty and inconvenience, and their movements are not as coordinated as on the ground. Unsteady and wobbly, a little head up and back may come to a big flip, bending down and may somersault, so all the movements have to be carefully engaged.

Astronauts in the cosmic flight can look at the view of the Earth, which is also a great pleasure of their space life. Since ancient times, flying into space has been mankind's fondest dream. Astronauts in the spacecraft to see the Earth is very beautiful, it is a green sphere. During the daytime, when you look closely, most of the Earth is light blue, and the dense forested areas look even more blue, with the only real green area being the Tibetan plateau region of China. Some of the alpine lakes look bright and vivid green, like the color of copper sulfate mines. Areas with very low temperatures and no clouds, such as China's Himalayas, can be clearly seen in the alpine region. Astronauts can see the most dazzling spectacle, to be considered as Iran's Kavir Salt Desert, this large desert looks like Jupiter, there is a red, brown and white vortex in the middle, which is because of the salt lake after generations of evaporation and left behind the brilliant traces, it is like emerald glittering.

Physical exercise is indispensable

Astronauts living in space are also indispensable to physical exercise. In addition to enhancing physical fitness, it also has its own special significance: to enhance the ability to adapt to weightlessness and other spaceflight environments, and to reduce the harmful effects of adverse environments on astronauts during spaceflight. In long-term spaceflight space stations, there are "small stadiums" specially designed for astronauts' physical exercise, and some special spaceflight sports equipment is set up for astronauts' use. These appliances are bicycle work meter, miniature runway, spring tensioner and negative pressure cylinder and so on.

Astronauts navigating in the universe, like people on earth, need to have personal hygiene treatment, such as brushing teeth, washing face, bathing, urinating and defecating, etc. Under weightlessness conditions, astronauts have to deal with hygiene and sanitation. The handling of hygiene and waste under weightlessness is very complex and requires special facilities and skills.

When brushing teeth in weightlessness, the toothpaste foam is easy to float up, and the water droplets flying in the cabin will affect people's health and the normal operation of the instruments. Astronauts in the spacecraft can't take the tools and methods of brushing teeth on the ground. Doing that, maybe in which part of the water leaks out, the water will float up, so the astronauts can only adopt a relatively simple way to brush their teeth. The U.S. uses a special gummy candy that allows astronauts to fully chew instead of brushing their teeth for the purpose of cleaning them. Astronauts wash their faces by actually taking a piece of wet towel soaked with a cleansing care solution and scrubbing their faces. The towel is then spread over a massage brush and used to comb the hair.

Astronauts will also need to shower if they live on the space station for an extended period of time. Long-term manned space stations are equipped with space bathrooms designed and built by space engineers and technicians. This bathroom is nothing more than a strong nylon fabric bath cover, bath cover up and down with a fixed frame, connected to the canopy under the floor, becoming a through-the-air closed bath cover, usually folded and fixed in the roof of the living module. Canopy is also equipped with a round water tank, nozzle, electric heater, bath with the water tank, there are pipes and large water tank connected.

Before taking a bath, the purifying adsorbent in the wastewater recycling and purification device is prepared to be used for recycling and purifying the sewage from the bath, and then clean the water supply pipe, pumping device and filtration and purification device (removing the impurities and bad smells), and put down the nylon cover rolled up on the ceiling, straight to the bottom frame and fixed, forming a drum connected to the floor of the ceiling as if it were a completely transparent large glass tank. . An electric heater is activated to heat the water in the tank to the right temperature, at which point a person can remove their clothes and enter the bathroom. There is a pair of fixed slippers underneath the cylinder, so that the person will not float up after wearing it. Before turning on the water faucet, the respirator should be put on first. The respirator is connected with a hose leading to the outside, so that the astronauts can breathe the air in the cabin and avoid the danger of inhaling the air and water vapor mixture into the respiratory tract when taking a bath. When astronauts take a bath, they also have to plug up their ears and put on goggles, just like divers. After everything is ready, you can turn on the faucet, a burst of fine water sprayed on the body, forming a layer of water film entrapped with countless bubbles, you must use a towel or absorbent brush to suck the water away. Weightlessness when the water will not automatically out of the water tank in the gas pressurization, the water will continue to flow out.

The handling of astronauts' urine and feces on the spacecraft is also quite scientific. Urinal is a special, flush toilet with a plastic sleeve connected to the rapid closure of the rubber valve, stool through the airflow into the breathable stool collection bag, and then sealed in a sealed bag into the tube, the tube will automatically pop out of the cabin after filling.

This is the special life of astronauts, is not it really amazing?

Spaceflight: refers to the flight of artificial Earth satellites, spacecraft, etc. in the space near the Earth or in the space of the solar system.

In today's rapidly evolving scientific and technological situation, the toolkit is always relatively old or the definitions are vague and imprecise. Although there have been localized changes to follow the development of the situation, but often this also creates contradictions.

In modern natural science, the "universe" adopts the second explanation. Commonly speaking, the universe is the sum of space and time. Our ancestors have long had a correct understanding of the universe. In the ancient book of the Han Dynasty, Huainan Qiyuanxun, it is said that "the four directions up and down are called Yu, and the past and present are called Zu". Zhang Heng, a famous astronomer of the Han Dynasty, said, "The surface of the universe is infinite, and the end of Zeus is infinite".

With the development of science and technology, the division of space and time requires more and more fine.

In the low productivity of the ancient times, people as long as the time distinction for, month, day is enough. Later, it is required to distinguish between the hour or hour to feel convenient. Modern industry and the rise of trains, automobiles, airplanes and other transportation services, and further requirements for the division of minutes and seconds. For modern science and technology, this is not enough, but also requires milliseconds, microseconds and nanoseconds to time.

The same is true for the division of space. In ancient times, as long as there is the sky, space and the ground such a concept is enough, but it is far from being able to meet the requirements of modern science and technology. Especially after the birth of space technology, the requirements of the "sky" and "air" strictly differentiated. The term "sky" refers to the vast cosmic space beyond the Earth's atmosphere. This is roughly equivalent to "sky" and "space". I say "roughly" because if the sun, moon, and stars do not include the earth, and "sky" is only found outside the earth's atmosphere, then "sky" is space, while "space" is the same as "space". The "space" is also generalized as the "very high sky", without a precise division of physical properties.

"Space" is the atmospheric space above the Earth's surface.

According to the above division, "weather", "weather forecast", and "starry sky" are called "air", "air", "air", "air", "air", "air", "air", "air", "air", "air", "air", "air", "air", and "air". "air", "air forecast" and "starry sky"? However, there is a problem of convention here, and there is no need to change it to avoid ambiguity. Similarly, the term "space science (technology)" should be called "space science (technology)", but if the term "space" is too ambiguous, then we need to go through the conventionalization process again. The term "space" should also be called "space science (technology)".

In today's rapidly evolving scientific and technological world, toolkits are always relatively old or have vague and imprecise definitions. Although there have been localized changes to follow the development of the situation, but often this also creates contradictions.

In modern natural science, the "universe" adopts the second explanation. Commonly speaking, the universe is the sum of space and time. Our ancestors have long had a correct understanding of the universe. In the ancient book of the Han Dynasty, Huainan Qiyuanxun, it is said that "the four directions up and down are called Yu, and the past and present are called Zu". Zhang Heng, a famous astronomer of the Han Dynasty, said, "The surface of the universe is infinite, and the end of Zeus is infinite".

With the development of science and technology, the division of space and time requires more and more fine.

In the low productivity of the ancient times, people as long as the time distinction for, month, day is enough. Later, it is required to distinguish between the hour or hour to feel convenient. Modern industry and the rise of trains, automobiles, airplanes and other transportation services, and further requirements for the division of minutes and seconds. For modern science and technology, this is not enough, but also requires milliseconds, microseconds and nanoseconds to time.

The same is true for the division of space. In ancient times, as long as there is the sky, space and the ground such a concept is enough, but it is far from being able to meet the requirements of modern science and technology. Especially after the birth of space technology, the requirements of the "sky" and "air" strictly differentiated. The term "sky" refers to the vast cosmic space beyond the Earth's atmosphere. This is roughly equivalent to "sky" and "space". I say "roughly" because if the sun, moon, and stars do not include the earth, and "sky" is only found outside the earth's atmosphere, then "sky" is space, while "space" is the same as "space". The "space" is also generalized as the "very high sky", without a precise division of physical properties.

"Space" is the atmospheric space above the Earth's surface.

According to the above division, "weather", "weather forecast", and "starry sky" are called "air", "air", "air", "air", "air", "air", "air", "air", "air", "air", "air", "air", "air", and "air". "air", "air forecast" and "starry sky"? However, there is a problem of convention here, and there is no need to change it to avoid ambiguity. Similarly, the term "space science (technology)" should be called "space science (technology)", but if the term "space" is too ambiguous, then we need to go through the conventionalization process again. The term "space" is too ambiguous, so we need to go through the process of agreeing on it again.

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