What creatures on Earth have been in space before humans went into space?

The exploration of space has always been the pursuit of our human beings, after all, there are many things in space that we humans do not know yet, and this unknown attracts us human beings to explore. Since the last century, we humans have been working and researching to explore space.

So in order to explore space, observation from the ground alone is not enough, and scientists then proposed to send humans into space for exploration, but this undoubtedly lacks some practical experience, so in order to ensure the safety of astronauts sent into space, in the early years, dogs, monkeys and other animals were sent into space with the help of spacecraft, so as to assess what kind of risks human beings will face in space.

However, in the beginning, space was full of unknowns, so in order to ensure the safety and accuracy of the exploration work, repeated simulation experiments were conducted, and the results of the experiments also played a role in the actual space exploration work. Since it is to assess the risk of human access to space, monkeys, who belong to the primate class like us humans, are naturally the best subjects for experimentation. And in the careful cultivation and selection of scientists, a monkey named Hamm was chosen, which was sent into space by scientists with the help of a spacecraft, and successfully survived in space and returned to Earth safely.

Don't underestimate such an experiment, in which scientists have to overcome countless difficulties, such as how to maintain the spacecraft's instruments and equipment in the weightless environment of space, and how to protect the safety of monkeys during the launch and return of spacecraft. After all, this is all to ensure the personal safety of astronauts as much as possible in the later space exploration work, and to lay a solid foundation for the later manned space project.

However, there are still certain limitations in this experiment, and monkeys and other animals actually have a lot of differences compared to us humans, so the reference value of the experiment is also limited. Later, scientists discovered that astronauts living in space for a long time had irreversible genetic changes, which were not noticed at the time. Hamm, the monkey who managed to survive in space, only lived about 20 years before dying after returning to Earth, and people are now more aware of the ethical aspects of human nature than the excitement of the successful experiment.

It is true that thanks to the help of these animal experiments, we can better explore space.

However, from the perspective of human nature, the view of reverence for life that we humans advocate fails to achieve, after all, the use of animals for scientific experiments is indeed unreasonable. We should be grateful to the animals who have participated in the experiments for our human exploration, and at the same time, we should also reflect on ourselves and try to find new ways to replace these animal experiments.

In order to ensure the safety of astronauts sent into space, in the early years, animals such as dogs and monkeys were sent into space with the help of spacecraft to assess the risks faced by humans in space.

The first to go into space was a dog, a test subject of manned human flight, and he is still floating in the universe until now, and this dog's name is Laika.

Monkeys, monkeys on Earth went to space before humans went into space, and then this surviving monkey Hamm returned to Earth and lived only 20 years before dying.

Monkeys, dogs, etc. Because humans have experimented with monkeys and sent dogs into space, these animals have been in space before humans entered space.

Because people can use spaceships to leave the earth and reach space.

The spacecraft can only fly into space by overcoming the gravitational pull of the earth by the powerful thrust of the rocket.

After the spacecraft goes into space, the gravitational force it receives is exactly equal to the centrifugal force of the spacecraft around the center of the earth, so even if the engine is not working, the spacecraft can still fly in space without falling, but it does not mean that the acceleration of the spacecraft is zero, but that this acceleration is exactly equal to the acceleration of the spacecraft that can move in a circular motion In addition, in the absence of air, there is a special oxidizer and fuel on the spacecraft, and the engines of the spacecraft can still ignite and work, There are also ships that use other types of thrusters, such as low-thrust electric propulsion. With the rapid development of science and technology, people are exploring outer space faster and faster, and with the manufacture of high-thrust rockets, people can explore a wider space in the universe.

The environment in space is very special and very different from the environment on Earth. There is no gravity, no atmosphere, no water and no air in space, and even no sound and no light. In space, people need to go through rigorous training and preparation to adapt to this special environment.

First of all, people lose the role of gravity in space. This means that their bodies lose their sense of direction and are unable to determine up, down, left, right, and left. They need to judge their position and posture through sight and touch. In space, people feel light and even float.

Secondly, there is no atmosphere in space, and people cannot breathe fresh air. He and the Hongs need to rely on oxygen** to stay alive. The spacesuit is equipped with an oxygen tank and an air purifier that can provide enough oxygen for people and filter out harmful gases such as carbon dioxide.

There is also a lack of water and food in space. People need to rely on stored water and food to stay alive. In space, water is a precious resource, so it needs to be recycled. Food also requires special handling and storage to guarantee quality and nutritional value.

In addition, there are risk factors such as radiation and microgravity in space. Radiation can cause serious damage to the human body, while microgravity can affect the body's muscular and skeletal systems. To cope with these risk factors, people need to carry out strict safety measures and health monitoring.

In short, there are many challenges and difficulties that people need to face in space, but there are also opportunities for unprecedented scientific research and exploration. In the future, with the continuous development of space technology, people will be able to have a deeper understanding of space and the universe, and open up a broader future.

Did humans know that there was no air outside the earth before they went into space? Why? When it comes to the air we breathe, it is in the interior of our planet.

We know that the Earth is in space, and space is a vacuum, and there is no air in it. So why doesn't the air on Earth flow into space?

Why doesn't air flow into space on Earth? It's simple, but 9 out of 10 people don't know that you might say that air from Earth doesn't flow into space because of the atmosphere. If so, it would be a huge mistake.

In fact, air from Earth is pouring into space all the time. Although the air quality is light, it is still heavy, so there is only gravity between the air and the earth. Earth's gravitational pull pulls the atmosphere up to 100 kilometers thick, which is why the lower and higher the pressure, the thinner the air.

This is what we call atmospheric pressure, and the higher the atmospheric pressure, the less gravitational pull the earth has on the air. The lighter gases in the air flow naturally into space, but on Earth this air is insignificant.

According to some scientists' estimates, the Earth's atmosphere weighs about 60 trillion tons. Only a few hundred thousand tons of the atmosphere escape into space every year, which is a small change for the Earth's atmosphere. In addition to the Earth's gravitational pull, the Earth's strong magnetic field also plays a positive role.

Otherwise, no amount of air can withstand the power of the solar wind. After all, we all know the power of the sun. What's more, the air on Earth plays an important role in protecting us and is our first line of defense against outer space.

So the atmosphere is very important and we have to protect it. What do you think?

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Because practice is the only criterion for testing truth.

The vast universe is vast, and the earth in which human beings live is only a drop in the ocean in the vast universe, and human beings have very little understanding of the universe, so it has also aroused human beings' desire to explore the universe.

The earth's resources are not endless, and one day they will be exhausted, and with the impact of human activities, the earth's ecological environment is facing a severe test, which forces us to consider whether human beings will migrate to alien planets in the future.

There are many resources available to human beings in space, and exploring space can find new energy sources and develop new technologies, and it is also for the purpose of better protecting and developing the earth.

What the Earth really looks like in space is shown in the following diagram:

This ** photo was taken in 1972. At that time, when American astronauts were on a mission to the moon, they took a complete picture of the sun-facing side of the Earth from the spacecraft. This ** is the most standard "ID photo" of the earth, and at the same time, it is also the first and most complete earth ** obtained by human beings.

The color of the earth changesMany people have the impression that the Earth is a blue planet, but in fact, the Earth has undergone a long process of changing color, including red, black, white, purple, green, azure and now gray-blue. The amount of oxygen on Earth is negligible, and the element iron.

Most of them can only react with hydroxides, sulfur, chlorine and other elements to form a substance called "oxygen-free rust", which dyes the nascent oceans green, causing Earth City to become a "green planet".

Space is out of reach, but that was in the past, we knew in mythology that there were Chang'e and Guanghan Palace on the moon, but with the development of science and technology, we know that there is nothing above, over the years, China's aerospace industry has sent batches of astronauts to space, making outstanding contributions to the development of our aerospace industry, we can look down on the earth, but the earth does not seem to be very large, because the distance is hundreds of thousands of kilometers, and almost all living things on the earth are invisible, So what exactly is the only terrestrial creature visible to the naked eye in space? That's coral, and it's not a coral, it's a coral colony, the largest coral group in the world, and the Great Barrier Reef in Australia stretches for thousands of kilometres, so you can imagine how spectacular it is to see it from above.

If you say who is the largest creature in the world, many people will say that it is a blue whale, you must know that he is only the largest animal, life is often those plants, many plants can cover a distance of several kilometers, not to mention those plants that have lived for thousands of years, and we can't see the blue whale in space, because he is still too small, compared to the earth, it can only be regarded as a drop in the ocean, and the only coral group we can see is not unfamiliar, because corals are not common, But their beauty is reflected in our culture, and these coral colonies are ecosystems after ecosystems, and their presence affects many animals and plants, and there are abundant fish here, and there are also many plants, which are an integral part of our biodiversity. <>

For the ocean that divides more than seventy percent of the earth's area, we can still see it at a glance, it is precisely because of this that there will be a blue planet, whether it is coral or the ocean where coral lives are our rare treasures, every year through the ocean to feed hundreds of millions of people, it can be said that the ocean is the regeneration of many people's parents, and I hope that the people of the world can protect all this. <>

The only thing that can be seen with the naked eye in space is coral, and this is not a coral but a coral colony, the largest coral group in the world, the Great Barrier Reef in Australia stretches for thousands of kilometers, and you can imagine how spectacular it is to see it from above.

The only creatures visible to the naked eye in space are coral reefs, which are very beautiful and very colorful.

The only Earth creatures visible to the naked eye in space are coral reefs. The form is relatively beautiful.

This creature is the Great Barrier Reef, and because it can reach a length of more than 2,000 kilometers, it can be clearly seen even from space.