Anything heavier than air falls. Water flows into the valleys, bubbles of boiling water rise to the surface. This balance of power creates compensation for them, Gaida adds. This constant force that blows over all things on Earth is often a factor in interference in Scientific research. In order to be able to optimize, for example, an aluminum alloy, it is necessary to know exactly the parameters of the material. However, gravity prevents them from being set at will. Also, to understand the game of reactions, from simple physical processes to complex biological systems, it is important to “turn off” gravity.

Figuring out what happens to a person, plant, material or drug in the absence of gravity is essential. There are only two effective ways weightlessness simulation: either leave the atmosphere or perform parabolic flights inside it.

Some of the exemplary projects are German cooperation with Russia. For example, when studying plasma crystals, German and Russian scientists first performed them in spatial conditions. An absolute novelty considering that space research in the Center Kingdom are under military jurisdiction.

The scientists who experiment here on parabolic flights will do the same in Shengzu. But how does the lack of gravity feel? A question that is on almost everyone's lips. She waited for them to sit on the floor and say that she only pressed on her legs and back.

I was surprised by how you feel. And before we can understand it, we will move on to a new phase. It was impossible to rationally distinguish between movements, what was happening to others, what was happening in my environment. The feeling of going from being weighed twice to not feeling any weight is not so amazing anymore. On the surface of the earth, we have no shortage of gravity. Here, in parabolic flights, we live 22 seconds without gravity. For 22 seconds we feel how much light can be human.

Parabolic flights were conceived to train astronauts who are about to leave Earth. Parabolic flights are also advancing industrial and medical research. Live in adverse conditions and some physical questions Action of sea pressure Action of anti-gravity Tuareg: life in the desert Extreme cold: life on the fly, flying cheap in a hot air balloon, is it physically possible? Life without gravity Life without friction Man in space.

Confirmation that a person can live and work on Earth was obtained from the first space flights of the sixties. But how long can one live in zero gravity if the body has not suffered permanent damage? This question remains unanswered.

Can a person live and work in space? The answer, clear and simple, has already been given to the first space flights, and undoubtedly yes. In fact, the first Soyuz and Mercury flights showed that a person can move freely through space, performing very complex maneuvers.

Modern space missions, and even more so the future, still need a man to discover the great secrets of the universe. But how long can a person stay in space without harming his body? And after long periods of weightlessness, a person can return to Earth and live normally in it?

These questions have not yet been answered, because long and complex experiments are needed to understand how the human body behaves in space. This will be the subject of research for many space flights. Human Beings in Space: Space is a very hostile place for humans. lack of air and atmospheric pressure can kill a person in seconds. Temperatures are impressive: close absolute zero in the shadow of the planet and a few hundred degrees under direct solar action.

In the absence of atmospheric protection, cosmic radiation can be deadly. Achieved in recent decades scientific and technological achievements made it possible to develop a large number of elements that protect a person during flights outside the atmosphere. Biologists, doctors, physicists, engineers and meteorologists have worked and continuously worked to improve the quality of life of astronauts and avoid risks during their time in space.

Although it has always been believed that gravity is necessary for normal development human life, the effects caused by weightlessness were much more dangerous than expected. Osteoporosis, muscle atrophy with severe respiratory diseases in the cardiovascular system, a decrease in the number of red blood cells, among other changes, forced specialists to design events for the crews. In addition, permanent space stations include periodic replacements of their crew so as not to expose them to excessive situations with prolonged weightlessness.

The absence of gravity, the magnitude of which is related to the mass of bodies, implies an atypical situation that creates an infinity of disturbances in the body of astronauts. Due to gravity, fluids are attracted to the legs and distributed correctly throughout the body. However, in space, the blood that should irrigate the lower limbs is redistributed in the head and chest and causes a characteristic swelling of the faces of astronauts at the beginning of the flight. There is a reaction of the body to the redistribution of fluids. To adapt to the new situation, water is eliminated, followed by a decrease in body volume.

Going back, the reverse situation occurs; therefore, by reducing irrigation in the upper body, astronauts may experience dizziness and fainting. The weight ratio in space is meaningless. A balance would be completely useless aboard a spaceship.

It is possible to assess whether a person is obese or thin, but it is not possible to determine their weight. When astronauts swim inside a ship, muscle atrophy eventually occurs. To counteract this effect, the crew must do daily exercise and wear suits with strong elasticity in the joint area to force movement.

Balance. In the first days of the journey, about half of the crew suffers from "space sickness", which manifests itself with vomiting, headaches and sweating. These are the confusion effects that weightlessness causes in the vestibular system, the balance organ located in the inner ear.

Power. Contrary to what you might think, astronauts need a lot of calories per day because they use a lot of energy for the simplest things. But besides including a lot of calories, the space diet is balanced differently from the Earth diet. For example, it is important that it contains a high percentage of calcium, since this element, which forms bones, is gradually lost in space. The same happens with red blood cells, which is partially counteracted by an iron-rich diet.

The mechanics of eating and drinking are also different. Food must be introduced into the mouth very carefully; Once there, weightlessness no longer matters. Drinking can be more difficult. You can't serve drinks with glasses because the surface tension of liquids causes them to stay inside their container and if agitated they will float like balloons. In any case, everything is decided with the help of straw.

Other important physiological issues that must be considered in spatial colonization involve the replenishment of oxygen and other nutrients that must somehow be maintained for months or years on a spacecraft; with the danger of radiation and, finally, with heat or cold, as well as with barometric pressure, which can cause spatial decompression.

Let's put it this way: one thing is the power of the weight, and the other thing is the feeling of the weight. The force of gravity that brings the Earth to the ship and its crew, weight, provides the centripetal force needed to keep them in orbital motion. Without the power to hold them, the astronauts have no sense of weight and are in a state of apparent weightlessness, just like in free fall.

Exercise and Rest Astronauts remain motionless most of the time. In the absence of gravity, the body floats in the cockpit and each movement requires very little effort, which saves energy but at the same time prevents basic physical exercise. One of the teams created to solve this problem, for weapons exercises, is similar to spring extensions. Astronauts also use electric bicycles, which require the same amount of effort as a cyclist on Earth.

In addition to activities, rest must be guaranteed. To rest, the astronaut covers his eyes with a mask, thereby avoiding the discomfort of light, natural or artificial. During the flight, information about the physical states of the astronauts is transmitted to Earth; The doctor analyzes the data and indicates the treatment.

If the excitement caused by the flight does not allow him to sleep, the astronaut can use sleeping pills. The spacecraft has a well-equipped pharmacy for any emergency and for the most common ailments. Astronauts are trained to perform short and long rest shifts as required by mission.

For seven hours and 55 minutes, Tamara Jerningan and Danielle Barry went for a walk. For a long 1 it was not an ordinary walk, because both were Discovery astronauts, and the walk was done at an altitude of 386 thousand meters. The goal was to place two small cranes on the International Space Station, to which Discovery has been attached since last Saturday. Jerningan and Barry were escorted by five other companions, three Americans, Canadians and Russians, from inside the ship.

Weightlessness is an experience that can cause discomfort for human body. But after the first strike, there are also very funny situations. Observing how atomic or molecular structures form in different materials, how liquids behave, or how combustion changes in a weightless environment are just some of the topics on this big agenda.