After 5 billion years, the sun will burn out, and the earth will be in darkness. Where will human beings go?

We all know that there is an alternation of day and night on the earth we live on. The seasonal changes of spring, summer, autumn and winter are precisely such changes that make life on earth colorful. It has rich species diversity. These abundant species on Earth are all powered by the heat and energy emitted by the sun.

Although the sun still continues to emit heat, there are always people who worry about what will happen to the earth if the sun's energy burns. But it is too early to talk about this issue. Even if the sun becomes a white dwarf at a later stage, it will still emit light and heat. Even brighter than the current sun. From the perspective of the change of the brightness of the sun, the brightness and heat of the sun will increase by 10% every 1 billion years. Therefore, the sun will not get darker and darker in the future, but brighter and brighter.

Even at the end of the sun, the sun will be 2.2 times brighter than it is now. Not only that, the earth will be much brighter, and the cultural relics on the earth will be about 60 degrees higher than they are now. At this time, it means that the sun has passed the stage of prime of life and entered the stage of old age.

At this time, the center of the sun further shrunk to become a solid white dwarf, and, from this time on, the surface temperature of the sun is still about 100,000 degrees. Very bright. Because the fuel of the white dwarf is very little, but because the white dwarf is dawning, the fuel burns slowly, so there is no need to worry about the sun's fuel running out, and the earth will be dark.

If at that time, human beings are still living on the earth, the most worrying thing is not the darkening of the earth, but after 1 billion years, the brightness and temperature of the sun will exhaust all the water resources on the earth.

It's just that we are worried that the sun's fuel will burn out. The current sun, the earth, and the universe are still young, so there will not be too large-scale cosmic events in a short period of time. What we really need to care about now is the environment on the earth. After all, we have not yet found a planet suitable for our survival. If we want to continue to survive on this planet, we must protect our existing environment. This is what we should pay attention to.