How far do you think humanity is from space travel?

I think that as long as we continue to follow the current trend, we can achieve this in the near future.

If I can leave the harm of human vermin and have the support of human Allah, soon the universe will be the backyard of mankind.

There are still several problems to be solved before humans can go on long-term space travel, water, food, oxygen, energy and fuel storage for aircraft, but with the current development of science and technology, I think it is very possible this century.

I think it's still far away, because the current technology still needs to be improved, although there are astronauts who can enter space, but they still have to wear clumsy spacesuits, which is not convenient for ordinary people.

I don't think humans are far away from going to space, technology is getting better, astronauts are already able to go into space, and although they all have missions, it proves the possibility of space travel.

For space travel, this is not a dream, although with the current technology, there may be some risks, but it can be completed, and perfect space travel, it will take more time, I believe that in the next ten years, it can be realized. I remember that a few years ago, there was an event in Europe to recruit volunteers for space travel, and one person from China was selected, and he started a series of trainings to lay the foundation for this. Of course, it seems that Russia had a big rich man who went on a space trip a few years ago.

I don't remember exactly which country.

If you want to make space travel "universal", you need a set of rigorous rules and a long training cycle, ordinary people want to travel in space and must systematically learn the rules of survival and emergency means in space, and at the same time, the professional talent team that provides training for ordinary people also needs to be built, which is not only a matter of time, but also a practical problem: can ordinary people leave their jobs to participate in space training for months? How to solve the family's financial problems?

Even in the United States, where the average economic level is strong, most ordinary people with various types of loans are unlikely to participate in space travel.

It's still far away, although the current social science and technology are very developed, and robots have also been created, but if you want to travel to space, everything in space has always been mysterious, scientists are still discovering, researching, but now it's only the tip of the iceberg, it's still early.

Space elevators need to wait until ultra-high-strength materials mature and the cost of space space is greatly reduced, and the time should not be earlier than the large-scale use of rockets and aerospace aircraft. It is estimated that the time will not be until the end of the 21st century. The nuclear fusion rocket engine is the most technically difficult, but after solving it, the benefits will be far greater than that of the rocket, spaceplane, and space elevator.

Since the nuclear fusion reaction engine can achieve a specific impulse of tens of thousands of seconds, spacecraft equipped with such engines can even fly directly from Earth to Jupiter. If this technology is successful, mankind will enter the space age, which may be a new technological revolution, and mankind will go out of the earth and fly into space. In terms of time, the commercial use of nuclear fusion reactors will not be earlier than 2050, and the nuclear fusion rocket engine will be even later, possibly until the 22nd century.

It is estimated that it may be achieved in 2080, which is still very far from now. ‍‍

If you want to make space travel into the homes of ordinary people, there are only a few possibilities. The first is that it can be used on a large scale by rockets, and the cost of commercial launch has dropped dramatically, and space travel has become a regular life that ordinary people can afford. The second is that the cost of aerospace aircraft is similar to that of today's passenger planes, and people carrying aerospace planes are similar to taking passenger planes now.

The third is the successful construction of space elevators and the democratization of space travel. The fourth is the successful development of a nuclear fusion rocket engine. But the civilian adoption of the rocket may not wait until Musk's Falcon super rocket is put into service, and this will not be until after 2030 at the earliest.

Even then, space travel would not be able to reach the homes of ordinary people, and such a time could be pushed back by at least a year. It is estimated that it may become a reality in 2050 (this is still the United States, China will wait a few more decades).

Aerospace aircraft are now basically successfully developed in the West, such as the United States, and the scramjet engine should be able to take off to test hypersonic demonstrators in 2025, while aerospace aircraft based on hypersonic aircraft may not achieve their first flight until 2040. Even if the first flight of the aerospace aircraft is made, it may take at least 30 years to reduce the cost and put it into commercial use, and it may take even longer to reduce the cost to a size that the common people can afford, and it is estimated that it may become widespread in 2080, which is still very far from now. ‍‍

Humans have to get suborbital travel before they go into space travel, and the altitude of suborbit is between 30 and 100 kilometers, which is more represented by Virgin Galactic. The company is about to begin the second powered flight test of the Spaceship Two suborbital aircraft. In a recent public comment, Virgin Galactic CEO Branson noted that the Spaceship Two suborbital aircraft is expected to make a suborbital flight by the end of the year and begin commercial operations within six months.

Branson himself was included in the first passenger transportation plans.

Zhi art, to promote human progress. dao

First of all, since the earth inhabited by human beings is only a small planet in the vast universe, the current understanding of space by human beings is the same as the understanding of the sea by children playing in the sand on the beach. Mankind's desire to learn about space will be the eternal driving force for space exploration.

Secondly, the purpose of space exploration is also to better protect and develop the earth. At present, the earth is facing serious challenges such as climate warming, ecological destruction, energy depletion, and the possibility of asteroids hitting the earth, which forces us to consider whether human beings need to migrate to other planets in the future.

Therefore, the only way to make human society sustainable is to solve the problems of ecological protection and sustainable use of energy on the earth, and develop and utilize space resources to continuously improve human life.

Finally, in the process of space exploration, mankind will abandon the human-centered concept of "man conquers heaven", strive to protect the ecology of space, and achieve the ultimate goal of "harmony between man and nature".

Why do humans explore the universe?

Humanity has been expanding since its inception.

From our individual point of view, when we were born, we were only able to move around us, and later we were able to move freely in the bedroom, and later we were able to move freely in the park. After going to school, the distance between home and school is the most suitable distance for us, and then we can freely explore in the city where we live, after the college entrance examination, we go to the field, to hundreds or thousands of kilometers away, the meaning of our life may be to explore the unknown, go farther and farther.

Remember the phrase "Once, our ancestors gave up the sea; Today, we can no longer give up deep space." Human beings are the most intelligent beings, and we actively explore, explore unknown secrets, find the meaning of human beings, and break through the mysteries of life. The spirit of exploration and the spirit of curiosity allow human beings to explore space.

More than 100 kilometers away from the earth is space.

Space, as explained in the Chinese dictionary, is extremely high in the sky. The International Air Federation in Geneva, Switzerland, defines the boundary between the atmosphere and space: the boundary between space at an altitude of 100 kilometers above the Earth's sea level, known as the Kármán line.

About 75% of the atmosphere above the Earth is in the troposphere and 97% below the stratosphere. The density of air in the thermosphere is 1% of the Earth's surface, and air continues to exist at an altitude of 10,000 kilometers in outer space, and there are still air particles at an altitude of 100,000 kilometers. Therefore, there is no clear boundary between airspace and outer space.

Such a wish is not far away from us, and after a period of research, we can realize such a wish, and now there are devices for virtual space tourism.

It is still far from us, because space tourism consumes a lot of human, financial and material resources, so the probability of achieving it to a certain extent is relatively small.

It's quite far away, and there's no way to achieve it yet. Because to overcome many difficulties, a large amount of capital and scientific and technological support is also needed.

The history of human space exploration can be traced back to ancient times, but with the development of science and technology, the motivation and purpose of space exploration have also changed.

First of all, the original motivation for exploring space was out of curiosity and desire to explore the universe. Humans have always wanted to know more about the universe, and exploring space is the best way to achieve this. In addition, exploring space can also help humans better understand the Earth because of the close connection between them.

Second, exploring space can also help humans access more resources, such as solar energy, minerals, and water. In addition, space exploration can also help humans make better use of space technology, such as communication technology, weather forecasting technology, and space technology.

Finally, exploring space can also help humanity better understand the origin and future of the universe, as well as other life forms in the universe. Exploring space can help mankind better understand the structure, operating mechanism and development trend of the universe, so as to better grasp the development trend of the universe.

In conclusion, space exploration is the best way for humans to explore the universe, which can help humans better understand the universe, access more resources, use space technology, and better understand the origin and future of the universe.