What will happen to the earth if the sun stops emitting light and heating?

4.6 billion years ago, the solar system was formed. At this time, a planet close to the sun began to form, and it was the earth. Because the location of the earth is very superior, in the area with suitable temperature and light, life was born soon after the earth stabilized, and the earth became a planet of life.

Of course, the life planet is not the ultimate goal of the earth. After billions of years of evolution and evolution, life has become more and more complicated, and finally intelligent human beings were born millions of years ago. Since then, the earth has been upgraded from a life planet to a civilized planet. Why can the earth stand out from many planets and become a rare life planet and civilized planet in the universe?

In addition to the superior conditions of the earth itself, there is also an important reason that there is suitable sunlight. It is with the help of the sun that life on the earth was born and human beings were born. Therefore, life on earth should regard the sun as its mother, which gives the earth the opportunity to breed life.

I believe everyone knows the importance of the sun to the earth. All the beautiful ecological environment and all the life on the earth can survive without the light and temperature of the sun. However, what will happen to the earth if the sun stops shining and heating one day? Maybe a new sun will rise.

The sun is about1.500 million kilometers away from us, so it takes about 8 minutes and 20 seconds for the sun to shine on us. Then, if the sun stops emitting light and heating, after 8 minutes and 20 seconds, the earth will fall into darkness, which is different from our present night. It was really opaque at that time.

After the sun goes out and no longer shines and heats up, the earth will slowly usher in great survival changes. The obvious effect is that the temperature will continue to drop. In the first week of the disappearance of the sun, the surface temperature of the earth will drop to 0 degrees Celsius, and at the end of the first year, the surface temperature will drop to MINUS 73 degrees Celsius, just like the current temperature in Antarctica. 1 within three years, the ocean will freeze and become a huge frozen aquarium; 10 to 20 years later, the air near the surface began to freeze and began to snow, but this kind of snow was not composed of water, but of liquefied gas.

Without sunlight and temperature, plants will soon die without photosynthesis, herbivores will be extinct, and finally carnivores will be extinct. Some people may ask, what will be the fate of mankind? At the present level of human science and technology, if you want to survive without the light and heat of the sun, you can only move underground, because the surface temperature will be lower and lower, and you can't survive at all.

Because in the interior of the earth, the residual energy (20%) accumulated by materials and the energy (80%) generated by the decay of radioactive materials keep the core at a high temperature of 5000-6000 degrees, the center of the earth is actually equivalent to a huge heat source and can also be regarded as the underground sun. At that time, if human beings wanted to survive, they must rely on the underground sun.

As long as we build some huge underground cities, we can continue to live on the ground temperature. Some people may worry about food and oxygen. After all, human beings can't survive without food and oxygen. Actually, don't worry about this. Oxygen soil is essential. Although the temperature of the earth's surface is decreasing, the oxygen in the atmosphere will liquefy and fall to the ground, but at that time we will have special oxygen workers who will walk out of the underground city in special clothes and scoop some oxygen snow for everyone to breathe.

Food can also be solved in the underground city, so we don't have to worry about the life in the underground city. As long as human science and technology can continue to develop, people will live more and more comfortably in underground cities. Of course, the underground is not as good as the surface, because on the surface we can look up at the stars and see the stars all over the sky, but naturally we can't see the stars overhead in the underground city.

The above situation is planned based on the current technology of human beings. But if controlled nuclear fusion technology is realized in the future, the situation may be reversed. At that time, a new sun will rise from the earth's surface and shine on the earth instead of the original sun. Some people may ask: What is this newly rising sun? In fact, it is an artificial sun with controlled nuclear fusion technology.

As we all know, solar energy burns, glows and gives off heat by its internal nuclear fusion reaction. This is the essence of sun burning, so if we can master controlled nuclear fusion technology, we can also make an artificial sun. Although this sun can't be compared with the real star sun, there is no problem in supplying light and heat to the earth.

Therefore, if human beings have realized controlled nuclear fusion technology, the sun will suddenly go out one day and will no longer shine and heat. By then, scientists can quickly create an artificial sun and then launch it into the earth's orbit to restore the light of the earth. Of course, at that time, a sun may not be able to meet the light and heat of the whole earth, and it can launch multiple artificial suns to make the light and temperature of the earth reach a suitable level.

At that time, several suns could be seen hanging in the sky during the day, and the temperature was better than when the original sun was shining, because the energy output of the artificial sun could be controlled, that is, the temperature of the earth could be controlled. With the artificial sun, the temperature of the earth will naturally not drop, animals and plants will not become extinct, and human beings can survive better.

Of course, the above is only assuming that the sun suddenly goes out. In fact, the sun will not suddenly go out. Only after the internal hydrogen raw material is burned out will it come to the end of its life. However, once the sun reaches the end of its life, the earth will not go out so simply. It will continue to expand and the temperature will rise sharply.

At that time, if the earth was still in its current orbit, it would become an oven, and the surface temperature could reach the same temperature as that of Venus now. In this ecological environment, most creatures on the earth will be extinct, including humans. Therefore, when the life of the sun comes to an end, there are only two ways for human beings to survive. One is to give up the earth and emigrate to other planets, and the other is to leave the solar system with the earth like a wandering earth.

No matter which way we use to avoid the disaster of the death of the sun, we need strong scientific and technological strength. Without strong scientific and technological strength, we can't realize interstellar migration, let alone leave with the earth. Without leaving the solar system, the end of civilization is waiting for us. However, this kind of thing is still too far away from us. According to the normal development track, the expansion of the sun will not appear until several billion years later, and the life span of the sun is still 5 billion years. So there will be enough time for human development. It is possible that at that time, human beings were already a powerful interstellar civilization, and there were living planets all over the Milky Way.