How long is the life of the earth and how long is the life of the earth?

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

Don't worry, there is no specific time for the life span of the earth, and it is estimated that it will be satisfied with living for billions of years.

Hello dear, happy to answer your question, how long is the life of the earth? A: The lifespan of the Earth is a very complex issue that is not yet accurate**.

But based on the research and speculation of scientists, some estimates of the Earth's longevity can be derived. First of all, the Earth was formed about 4.6 billion years ago. According to current scientific knowledge, the Earth's lifespan usually ends in billions of years.

Among them, the evolution of the sun will be one of the most important factors affecting the life span of the earth. Current scientific theories suggest that the sun has about 5 billion years to live, at which point the sun will deplete the hydrogen resources inside its core, gradually expand and swallow the earth. Long-term geological changes, natural disasters, and human activities often have an impact on the life span of the Earth.

Overall, the lifespan of the Earth is a complex and varied question, and there is no clear answer yet. We need to continue to protect and value our planet to make it healthier and longer. <>

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