Do astronauts still have the concept of day and night when they are in space?

No, the universe is dark except for some luminous objects. Day and night are the day-night cycles due to the rotation of the earth, with day on the side of the sun and night on the back. This is a phenomenon of the earth.

Astronauts do not have the concept of day and night in space. Day and night are on the earth, and due to the rotation of the earth, there is a day and night cycle. It doesn't happen in the universe.

No, because there is no rotation in space, and there is no other sun outside the universe, there is no alternation of day and night.

The longest cosmonaut in space was Sergei Krikalev, a former Soviet Union.

Cosmonaut. He has flown six times on space missions with the Soyuz spacecraft and the U.S. Space Shuttle, and is the record holder for the longest time in space (803 days, 9 hours, 39 minutes).

Astronauts who have been in space for the longest time.

For his outstanding achievements in the field of astronautics, Sergei Kryka Zhenglianlyov was awarded the Hero of the Soviet Union.

and the title of Hero of the Russian Federation.

On December 4, 1998, Krikalev flew into space on the space shuttle Endeavour to start the International Space Station.

The first assembly task.

In February 2007, Krikalev was appointed Vice President of the Korolev Energy Rocket and Space Corporation, and also served as a liquid-starved Gagarin.

Director of the Astronaut Training Center.

There is no day or night for astronauts to see in space. Most of the time, all they can see is darkness. However, the sun can emit light, and the objects it illuminates are also bright, so the objects that astronauts see in the sky belong to the alternating part of black and light.

To put it simply, there is no refraction in space, and the sun is bright wherever it shines. But apart from this part, the rest of the area was dark.

1. The distinction between day and nightWe on the earth can distinguish day and night. The reason is also very simple, that is, there are dim lines on the earth. When the sun hits the front of the earth, we see that everything around us is bright, which is what we know as daytime.

When the sun hits the far side of the earth, it's pitch black all around us, and that's what we call night. However, there is air on the earth, and many things can be refracted by it, so a luminous thing can illuminate a piece around it. But this is not the case in the universe, there is no refraction or reflection, only regional light and darkness.

2. There is no concept of day and night in the universe, if we are in the International Space Station, then we see the outside, it is pitch black. And the sun is like a white spot on a black curtain in the whole of space. Since there is no refraction and reflection of objects, only some areas are bright while others are dark.

If we were on the moon, even if the sun hit the moon, all you could see would be black and bright. You may be able to see your feet, but you can't see around your feet.

3. Many people may wonder why we see that the universe is very bright. In fact, this is an illusion, astronauts or ** in the universe are basically synthesized. It is precisely because of this that many people think that there is only day and no night in space, which is a wrong idea.

3. Astronauts see that some planets do have light, and this is also from other planets, light reflection. Among them, we found that most of the parts are dark, but it is not excluded that there are some places with light, but some planets also have to achieve the purpose of light by reflecting the light from the stars, so because of this, sometimes we see some planets, which may be daytime or dark.

In fact, for us, most of the universe seen by astronauts is dark, because the universe is too large, and because of this, it is impossible to have enough light to illuminate the universe in a huge space, so in our understanding, astronauts cannot see that the universe is a night-like space existence.

It has always been a dream of our human beings to go into space, so the selection was carried out, and finally after a lot of training, astronauts were successfully allowed to enter space to explore human science and technologyAt this time, some people will ask the astronauts in space to see the universe during the day or at night. In fact, it is not a concept, and it cannot be represented by day and night, because there is no such concept in the universe.

The dream of space is what human beings all over the world desire, in ancient China, some people have tried to send themselves to the sky with firecrackers, although they failed, but although they were defeated, in recent decades, the human journey to the moon ended perfectly, aerospace is no longer a dream, astronauts in space to see the universe is day or night? The reason why we have day and night on earth,That's because the sun's light doesn't shine on the other side of the earth, but in space, the sun hits them all the way, and there are other stars, so the universe is daytime.

It is not a simple thing to go to space, first of all, astronauts must have special spacesuits, carrying astronauts' bodies to be different from ordinary people, there is no gravity in space, you may rotate back and forth, if you vomit at this time, the consequences are unimaginable, and space must be equipped with special oxygen cylinders, outside the atmosphere, the thinness of the air is simply terrible, there is not even oxygen to supply us to breathe, the spacecraft that can go to the sky is full of science and technology, these are all stumbling blocks that hinder us from going to the sky, So it's not so simple to realize the dream of spaceflight.

Because the earth is round, we have the arrival of night, when the sun's rays hit one side of the earth, most of the creatures on the other side will go into a dormant state, for humans, this is for the next day to have a better mental work and to give the various organs of the body a chance to relax, so there is a cross of day and dark will be more suitable for survival.

There is no day and night in the universe, and the earth has a day and night alternation because there is an atmosphere that can scatter light. But there is no atmosphere in the universe, so it's all black. However, the universe is not without light, because there are many galaxies, and countless stars can still be seen shining.

It is night, due to the rotation of the earth, the ever-changing morning and dusk line can be formed on the earth, this line is the dividing line between day and night on the earth, we are in the hemisphere where the sun shines, and we feel that the surroundings are bright, we naturally think that it is day, and vice versa.

It's the night. Because the universe is so large, it is said that the light of the universe cannot spread throughout the universe, so most of the universe is still in the night.

The sun rises and the sun sets. Since ancient times, people have worked and lived according to this pattern. We experience the change of day and night, the change of seasons, we get up at sunrise to work, and the night enters a state of rest.

But can astronauts in space feel the change of day and night as much as we do? In fact, astronauts do not feel the obvious change of day and night, and there is no obvious change of day and night in space like on Earth.

The reason for the formation of the day-night cycle is the rotation of the earth. Because the Earth's rotation period is about 24 hours, which is what we normally feel about the time of day. When the Earth rotates, half of it faces the Sun and half turns away from the Sun.

Day is formed halfway towards the sun, and night is formed halfway away from the sun. This is what we feel as the cycle of day and night.

In the change of day and night, people gradually formed their own way of life, they went out to work during the day and returned home to rest at night. At the same time, some animals and plants also form their own activity patterns according to diurnal changes. Some animals are also active and hunting during the day and rest at night; There are also a small number of animals that rest during the day and forage at night.

Of course, the same is true for plants, which absorb carbon dioxide during the day.

Oxygen is released and sunlight is used for photosynthesis.

At night, when sunlight disappears, they absorb oxygen and release carbon dioxide.

Humans living on Earth can clearly feel the change of day and night, but astronauts in the universe have difficulty feeling the change of day and night. Because the phenomenon of day and night is essentially a phenomenon that occurs due to the irradiation or non-irradiation of the sun, this phenomenon exists on every rotating planet. However, when astronauts enter the universe, there is no air in their space, and the sun does not refract it.

At this time, the astronauts saw the sun as a dazzling ball of light, and of course, if they had turned their backs to the sun, they would see a pitch black. As a result, they are not able to perceive the pronounced diurnal variation.

Astronauts see the universe in space without day or night, because no matter when they see the universe, they are very bright and can see the planets.

No, what astronauts see in space is the same, there is no day or night.

I think there is also a difference between day and night, because the earth is always doing rotational motion, and this is also in line with the laws of nature, so we must look at it rationally.

It is also necessary to sleep in space.

Astronauts sleep in sleeping bags, use sleeping bags to avoid astronauts falling asleep in the spacecraft, it doesn't matter if they are head-up or head-down, but they also need to consider factors such as air circulation to avoid a large amount of carbon dioxide accumulation in the astronaut's head affecting breathing.

The gravitational force of the earth on the astronaut is basically equal to the centripetal force of the circular motion, so the gravitational force of the astronaut in the spacecraft is very small, and the gravitational difference between the head and the feet is almost negligible, so the astronaut can sleep in the spacecraft without caring about the direction of the head.

The space station is equipped with carbon dioxide absorption and oxygen generation devices, which use negative pressure to absorb air and filter and then add air, as well as humidification and heat preservation devices, and the gas pressure in the spacecraft is close to the standard atmospheric pressure of the earth, simulating the earth's atmospheric environment as much as possible, making astronauts more comfortable in space.

At the same time, the orbit of the space station and other man-made objects around the Earth is very fast, there will be several sunsets in 24 hours, and the light can also affect people's sleep, so the sleeping room should be shielded from the sun.

If astronauts enter space based on local time, it is actually the same, because there is no time in the universe, so when we start to count the time, it is still based on the time of the earth.

The time after an astronaut goes into space is not the same as the time on Earth. The relativistic effect of the spacecraft's velocity skews the time scale slightly, but the deviation is negligible. There is a lot of debate in the scientific community about these questions, and even some consensus does not provide comprehensive answers.

In particular, is the existence of time and space a fictitious concept created by man, or is the universe deliberately restricting human development? Stephen Hawking organized a gathering of time-traveling humans from the future, but received no response, which many saw as proof that the universe would not allow humans to push the boundaries of time and space. In fact, it's not just Hawking's party experiments that show that there is a time-saving mechanism in the universe.

Astronauts sometimes choose the space station as the landing site for their space missions, bringing together state-of-the-art technology and full survival assurance to perform related tasks faster.

<> the space station has been revolving around the Earth, so it is flying at a speed of about 27,000 kilometers per hour. A year on the space station will be seconds slower than on Earth, making the astronauts relatively "young", which leads to a surprising hypothesis: if you stay on the space station long enough, will the astronauts live forever?

For scientists, this may seem unrealistic, as there are two major contradictions. If we can break the speed limit, we will also break the time limit, nothing in the universe can break the speed limit, there is no hope of traveling through time and space.

Albert Einstein once believed that there were wormholes in the universe that could help us travel through time and space. Hawking believes that if there is a time-saving mechanism for the universe, it is possible to fill wormholes with quanta and prevent humans from traveling through time and space. In addition, time travel brings many paradoxes, the most famous of which is the grandfather paradox, which is undoubtedly a great test for humanity.

Scientists have not given up on relevant research and may one day provide us with accurate answers.

Astronauts can also see stars in space, but the stars are relatively large. The sun is also very bright, because the astronauts are very close to the sun, so they will feel the temperature of the sun.

You can see the stars, and you can see them very clearly, you can see the outlines of the stars. Of course, the sun is bright, but the sunlight is so dazzling that you can't look at it directly.