Can the fantasy of space city come true?

Dr. O 'Neill, a physics professor at Princeton University, has been studying and building a space city for a long time. 1977, he published the book "Space Immigrant Island" and put forward three kinds of space island design schemes, among which "O 'Neill Island 3" is an umbrella-shaped space city. Like an open umbrella. The umbrella handle is two huge cylinders. This umbrella is very big. The umbrella handle alone is 6500 meters thick and 3200 meters long. In this vat, more than 654.38+0 million people can live. The two umbrella handles are connected by a transmission belt and rotate at the speed of 1 rpm, thus generating artificial power. The umbrella handle is surrounded by glass windows, and the windows are covered with baffles. The cover plate is inlaid with large glass. When the cover is closed, it is night inside. When the cover plate is opened, the sun shines in from outside, and it is daytime inside.

Inside the cylinder is a real city, with mountains, trees, flowers, rivers, stadiums, cinemas, hotels, airports, stations and docks. Residents of the Space City can go out for business by boat, bus or plane, or simply wave "take a taxi", just like on the earth, which is very convenient. What is particularly amazing is that this space city can also carry out artificial rainfall, with sunny, cloudy, rainy and cold changes. Scientists designed the edge of the umbrella stand as an agricultural hut. In the agricultural cabin, four seasons can be created in different cabins through temperature control. Therefore, the agricultural cabin is full of grains, fruits and vegetables. Because of the right temperature and humidity, there are herds of cattle, pigs and sheep in a whole circle, birds singing and beneficial insects flying. This is the whole world. Citizens living in Space City can eat fresh vegetables, fruits and food all year round.

Because the environment in the space city is very superior, we all breathe fresh air, and we don't have to worry about air pollution in cities around the world anymore. Superior environment and advanced planting methods, where can we eat green food?

Annular space city

This space city is like a big tire, with a diameter of 1800 meters. The diameter of the big ring alone is 130 meters, which can accommodate 10000 people for a long time. The ring rotates at the speed of 1 rpm, creating a gravity environment.

In order to enjoy enough sunshine in the ring, a huge mirror is installed above the ring, which refracts sunlight to the mirror in the center of the ring and then to the shutter of the ring. The blinds are open, the sun enters, and it is daytime inside; The blinds are closed, and it is night inside. On the central axis of the ring, one end near the ring is the space port. Many docking devices are designed to pick up and drop off people, so that spaceships that transport goods to Space City and spaceships that transport space junk and products to Earth can dock here, and at the same time, many spaceships can be received to visit. At the other end are space factories and solar power stations. There are six radiation tube channels connected with residential areas on the central axis. People can take the 100-meter elevator, enter the central axis through the radiation pipe, and then go to work in the factory along the central axis.

This big ring is divided into several compartments according to different uses, and each compartment is an area, including residential areas, schools, hospitals, restaurants, hotels, farms, meat processing plants, space factories and so on. Although people living in the space city are very civilized, necessary management work is still needed. Therefore, neighborhood committees, police stations and other institutions should be established.

Walking into the factory, there are almost no workers, all of them are computer controlled, and there is no noise and pollution. Walking into the farm, modern machines that don't emit black smoke are constantly working. Farm workers in white coats sit in front of computers and use them to control the work of these machines. In the bright spring, green peppers, eggplant, beans and tomatoes are smiling, and grain crops such as wheat and corn are swaying in the breeze. These carefree little creatures have forgotten the earth.

"sunflower" city

1975, an American scientist once proposed a space city plan called "Sunflower City". As the name implies, the style of this space city is a bit like sunflower. The main body is a cylinder with a diameter of 450 meters, which rotates at a speed of 2 revolutions per minute, so that it produces the same gravity as the ground, and people live and work on it just like on the ground. There is a conical reflector around to reflect sunlight, the outermost is the agricultural area, and the top is the condenser. The sunlight collected by this mirror generates electricity and provides electricity for the city. "Sunflower" city can accommodate 1 10,000 people.

space garden

In order to cooperate with the Ad Astra Plan, NASA and Boeing jointly developed an adaptive space capsule named "Happy Garden". This capsule is actually a life-sustaining system. In this system, all kinds of flowers, fruit trees and food crops will be planted, which will not only provide a good environment for astronauts, but also provide them with food and fruit. The carbon dioxide produced in the whole garden will be eliminated, and oxygen will be produced by Chlorella system to keep the air fresh. The Space Garden has also set up a "sports area" for the guests who come here to play space sports, and the attraction of the sports area is relatively weak.

Taikong collective farmhouse

In order to realize space migration and prepare for long-term manned space flight, at present, the United States, Japan and Western Europe all regard the long-term growth experiment of plants in closed space capsules as the key research project in their 2 1 century space plans. To this end, the design of space collective farms has begun.

At present, the idea of scientists is to build a collective farm in space into a spherical crown. The indoor temperature is adjusted by the outdoor rotatable mirror, which creates a growth environment similar to that on the earth for plants through artificial efforts. Scientists believe that the lunar soil itself cannot grow crops, but with a little modification, crops and other plants can be planted in space farms. More importantly, this soil can also extract oxygen and synthesize water, which can solve the domestic water problem of farm workers.

The crops and fruits grown in the space farm do not need to be sprayed with pesticides, and they are authentic green foods. In the future, all space farms will be mechanized, and workers can press buttons indoors to manage the farms.

Space City has many plans. With the passage of time, when the construction of the space city officially begins, there will be more, better and more scientific plans. By then, the space city will be presented to people, looking forward to their arrival.

Learning point

A space activity with the largest number of people gathered in space.

The largest number of people gathered in space was 65,438+03, which occurred during the STS-65,438+027 mission of NASA's Space Shuttle Endeavour in 2009. In 2009, Endeavour docked with the International Space Station. The seven astronauts on board joined the six members of the orbital laboratory, which was the biggest gathering in space. Although the number of people on NASA's space shuttle and space station will reach this figure in the future, it will never exceed 13.