What is the future space city of mankind?

There was a joke in ancient China. A rich man asked an architect to build him a castle in the air with only three floors. People laughed at his ignorance. Nowadays, times are different. We should not only build castles in the air, but also build a "space city".

"This cabinet geometry is high? Whose camp? Watch the sunset and climb the flying stars. " These poems by Su Shi describe the space city well.

With the massive construction of various space stations and space factories, human beings are bound to develop a complete system in space and build a space city. It is not a distant future for mankind to imagine establishing space colonies, establishing settlements, opening up a new world and building a new life in space.

So, where is the space city construction?

First of all, it must be permanent and cannot be reversed; Aircraft running in low-earth orbit will be slowed down by extremely thin air and eventually fall; Synchronous satellites tens of thousands of kilometers away from the earth only have a life span of more than 20 years. Then, a permanent space city must be built far away from the earth.

However, people will worry, will the space city float away?

According to scientists' calculations, there are some special points (regions) in space. At these points, the gravitational forces of the sun, the earth and the moon are balanced with each other, and the objects located in these places are like small balls placed at the bottom of the bowl, which cannot easily leave their positions. These points are named after the Italian astronomer Lagrange and are called Lagrange points.

1952, American scientists suggested to build the first batch of space cities on the computing point, code-named L5. Cities are moving, but they keep their positions relative to the earth and the moon. It only takes 5 days to get to the earth from L5, and the transportation is very convenient. Not far from the moon, you can make full use of the moon resources.

What is the appearance and scale of the space city? American scientist O 'Neill put forward the plan of 10,000-wheel space city, which is the simplest and most mature design and will be the first space city for mankind. The shape of the 10,000-wheel space city is like a wheel, with a diameter of 1.800 m and a "tire" diameter of 1.30 m. There are six residential areas and agricultural areas interlaced and separated from each other.

The wheel rotates around the shaft at a speed of 1 turn per minute. This is to create "artificial gravity" in the space city, so that people will not float around there and feel like they are on the earth. There is a big mirror and several small mirrors outside the Space City. By adjusting the orientation of these mirrors, residential areas can be divided into day and night, so that agricultural areas have the necessary sunshine and temperature. There are various buildings in the community, which are used as houses, shops, hospitals, schools and so on. Planting crops and raising livestock in agricultural areas. The traffic in this city extends in all directions. ...

So, where do the air, water and food in the city come from? Of course, they all came from the earth at first. With the progress of technology, a large amount of hydrogen can be obtained from asteroids as energy in the future.

In fact, the biggest problem is that human beings must form their own closed-loop ecosystem if they want to live in the space city forever. Experiments in this field are being carried out nervously.

It is not an illusion to establish human society in space. 2 1 century will be realized. The descendants of mankind will bid farewell to their relatives and the earth and go to space construction sites. They are the builders of space cities and will be the first space immigrants. This will be a veritable new human being!