How many more years will the Earth survive and how long the Earth will survive

The Earth is a relatively stable planet, and if there is no interference from external factors, it will always exist without the so-called longevity problem. But the sun has a lifespan, and after 4 billion years, the size of the sun will gradually expand, and it will engulf the earth, and then the earth will be destroyed. In addition to the Sun, it is an asteroid impact that can have a substantial impact on the Earth, but it is less likely that the Earth will die in this way.

The Earth is speculated to have survived for 4.6 billion years, but how long will it live?

I once saw a guy who said that in 500 million years, the Sun would turn into a white dwarf and devour the nearest planets.

The Earth is in these planets.

However, man-made destruction is estimated to shorten the duration of destruction.

But what's the point, no one can witness it.

It's good to have a good time, that's so much.

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.

Are there any other factors besides the sun's interference with the earth? Some scientists believe that the Sun may have a brother, a companion star of the Sun, which orbits the Sun day and night, and every 26 million years, turns to the closest place to the Sun"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 drastic changes in 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.