Where will mankind go after the sun dies?

After the death of the sun, humans can only go to other planets, or they can create an artificial sun to replace the sun.

After the earth loses solar radiation, the surface temperature will gradually decrease, all ecological cycles will gradually disappear, different forms of water on the earth will freeze into ice, and living things will gradually perish because of the low temperature. There are 5 billion years before the sun dies. In this process, human beings must develop an "artificial sun" to replace the real sun, or let the alien immigrants mature their technology and find another home suitable for our survival in the universe.

The sun is very important to life on earth. Solar radiation provides light and heat resources for the earth and maintains the surface temperature, which is the main driving force to promote water movement, atmospheric movement and biological activities on the earth. It can be said that the growth and development of life on earth are inseparable from the sun. With the existing technology of mankind.

Once we lose the sun, only extinction awaits us. After the sun loses its life, the energy in the universe is conserved, and the solar energy that emits light and heat comes from the thermonuclear reaction in its central area and is radiated into space. The sun passes through the dark space.

Only a very small amount of energy (about 2.2 billion) can be transmitted to the earth, and it is this very small amount of energy that becomes the main source of light and heat on the earth and the fire that illuminates the earth's biosphere. After the sun loses its life, how can human beings survive? Before the sun loses its life, its energy will run out one day.

Man must find a way to survive, or he is doomed to meet us. At present, the state of the main sequence star stage of the sun is equivalent to the middle age of human beings, and the nuclear synthesis reaction of the stars in the inner core of the sun fuses hydrogen into helium. In about 5 billion years, all the hydrogen in the sun's core will fuse into helium.

At this time, the sun will enter the old age, from a luminous star to a red giant, and expand outward to emit heat. During this period, helium in the core of the sun will gradually gather into carbon and gradually become a dead star.