What will the Earth look like in a few years?

It is estimated that the Earth has survived for 4.6 billion years. Scientists believe that if the Earth is allowed to move freely, it may exist forever, but if other external factors interfere with it, the Earth may have an end of life. The external factor is the sun in the first place, because it is the closest planet to the earth and can have a destiny on the right earth That is to say, all the energy and power on the earth come from the sun, and once the sun has three long and two short, it is bound to affect the earth.

Before the 30s of this century, people always thought that the sun would one day burn out, turn from white to orange and then to red, and finally become a dark star that was silent, but its brilliant life. In the 30s, when physicists learned the mystery of the sun's light, the situation was very different. It turns out that the Sun's energy comes from its thermonuclear reactions, and the Sun's lifetime will pass through the gravitational contraction phase, the main-sequence star phase, the red giant phase, and the compact star phase.

The main sequence phase is the period of stability of the Sun. This phase will last for 10 billion years. At present, the sun is only halfway through and is in middle age.

Once the Sun reaches the red giant stage, then the end of the Earth is coming. Of course, this is billions of years away.

Some scientists believe that the Sun may have a brother, a companion star of the Sun, which orbits the Sun day and night, and turns to the closest place to the Sun every 26 million years"Make waves"Its strong gravitational pull will cause a large disturbance of many comets, and 1 billion comets will be on a rampage in the solar system, and the Earth and other planets will become these comets"Target"。If the mass of the comet that collides with the Earth is large enough, the consequences are unimaginable: the extinction of light organisms and the upheaval of ecology; Heavy landslides and earth cracks, the earth"Broken bones"。

However, this solar companion star, which could bring misfortune to Earth, has not been discovered, although many scientists believe it exists.

A number of years is to set a specific time, 200 years later, there will be no human existence, they are no longer human because 100 years later, there are neutral people other than men and women, because women are weak and have menstruation can not adapt to life, the emergence of artificial neutral people fills a gap, neutral people from thousands, tens of thousands, to tens of millions account for one-third of the world's population, and gradually women are eliminated because men can mate with neutral people, Later, neutral people could also mate with each other, they had strong muscles like men, and they had a beautiful temperament like women, and gradually became the backbone of society, and they also abandoned men, and the earth was dominated by them ever since. But after 400 years, the mating between neutrals weakened and they were wiped out.

There may be. Because people change with their environment.