Humans can move into space.

The earth is the home for human survival. Since the birth of the earth, all kinds of life have been bred. As an intelligent life on the earth, human beings rule the earth, and in the process of development, they have also caused great harm to the earth. Nowadays, the resources of the earth are increasingly scarce, and the ecological environment of the earth has been greatly destroyed. If human beings want to develop for a long time, they must start looking for the "second earth". According to the development trend of the earth, one day the earth will no longer be suitable for human survival. Scientists are also anxious about the development of the earth's environment. Because human beings are still developing, the population will become more and more dense in the future, but the land area of the earth is limited. With the intensification of human expansion, the earth will only become more and more crowded. So scientists put forward the idea of space immigration. American scientists plan to build a space city. The design scheme is a rotating cylinder with a diameter of 2800 meters, and this space will accommodate 654.38 million residents.

Going to outer space is the main goal of scientists at present. Hawking once said that human beings must emigrate to other planets to get rid of the fate of extinction, because Hawking believes that under the influence of global warming, the earth will become hotter and hotter, and eventually the earth will become a "fireball". By 2600, it will be difficult for human beings to adapt to the environmental changes of the earth and become extinct. Therefore, scientists are constantly exploring to move into outer space. Griffin, director of the National Aeronautics and Space Administration of the United States, also said that from the perspective of historical development, species on a single planet cannot survive forever. "We have conclusive evidence that, on average, every 30 million years, species on earth will suffer massive destruction; One day we will definitely immigrate to another planet, but I don't know when that day will be. "

If humans want to move to outer space, where can they move? Some scientists once thought that Mars was a good choice, but we all know that Mars is a desert planet, with sand dunes and gravel on its surface and drought and water shortage. How can it be suitable for human survival? As early as September 28th, 20 15, NASA announced that there was flowing water on Mars. In 20 18, scientists discovered liquid water on Mars, and the next year, the American rover Curious also discovered a salt lake on Mars. These important discoveries rekindled the confidence of scientists to move to Mars. Elon musk, CEO of Space Exploration Technology Company, also proposed the Mars migration plan. Musk has publicly stated that his long-term goal is to migrate human beings from the earth to other planets and ensure that this process is safe and cheap enough. However, if you want to move to Mars, there is still a problem to be solved-oxygen, which is very dependent on human beings. Scientist Robert zubair believes that it takes 1000 years to make oxygen on Mars.

But obviously, humans can't wait that long. When NASA studied the planets in the solar system, it also said that other planets around the sun were not suitable for human survival, so Mars was "eliminated". Dr Margaret Tenbar, an astronomer at the Carnegie Institution in Washington, D.C., summed up four criteria of "the most suitable galaxy for life". First, the planet has existed for at least 3 billion years, so that the development of this planet is stable enough; The second point is that the volume of the central star cannot exceed 1.5 times that of the sun; Third, there must be enough iron; Finally, the central star should be in the development stage of being neither a red giant nor a white dwarf, so that the complex life on the surrounding planets can exist for a long time.

On the basis of these standards, scientists put forward "super earth", believing that "super earth" can make human beings survive. Super Earth is actually a super Earth-like planet. Its plate structure is very similar to that of the earth, and its environment has many similarities with the earth. Only in this way can the "super earth" be suitable for human survival, thus making it possible for human beings to realize space immigration. According to these conditions, scientists found BetaCVn, HD 10307, HD21415, Scorpio Sco 18 and Pegasus 5 1 in dogs, which were regarded as poles by scientists.

Scientists have explored the "super earth" for many years and finally made a major discovery. In 20 17, scientists found that gliese 4 1 1 and gliese 4 1 1b were hot rocks with surfaces. Later, scientists observed an M-shaped dwarf named LHS 1 140 through the "North-South" telescope array. This star is about 39 light years away from the sun, with a radius of 1.4 times radius of the earth and a mass of 6.6 times that of the earth. In 20 19, scientists also discovered a huge "super earth" 6 light years away-GJ 699b, whose temperature is very similar to Europa.