How long can the earth live? How long can the Earth live?

The current main-sequence phase of the Sun has been going through about 100 million years through computer simulations of stellar evolution and cosmochronological models. According to research, the rapid collapse of a cloud of hydrogen molecules 100 million years ago formed a Taurus T star of the first generation of the first generation, that is, the Sun. The newborn star orbits in a near-circular orbit about 27,000 light-years from the center of the Milky Way.

The Sun has reached middle age in its main-sequence phase, during which the stellar nucleosynthesis reactions that occur inside its core fuse hydrogen into helium. At the core of the Sun, more than 4 million tons of matter can be converted into energy every second, generating neutrinos and solar radiation. At this rate, the Sun has so far converted about 100 Earth-mass matter into energy.

The time when the Sun is the main-sequence star lasts about 10 billion years. The mass of the Sun is not massive enough to explode into a supernova. In 5,06 billion years, when the Sun's hydrogen is depleted, the core is dominated by helium atoms, and the Sun will transform into a red giant, expanding its outer layers when the hydrogen in its core is depleted, causing the core to shrink and the temperature to rise.

When its core temperature rises to 100,000,000 K, helium will fuse to produce carbon, which will enter the asymptotic giant branch, and when all the helium in the Sun is converted to carbon, the Sun will no longer shine and become a dead star (Black Dwarf). The ultimate fate of the planet is not yet known. When the Sun becomes a red giant, its radius can exceed 1 AU, which is 260 times the current radius of the Earth beyond the Earth's current orbit.

However, by then, as an asymptotic giant branch star, the Sun will lose about 30% of its current mass due to stellar winds, and the planet's orbit will be extrapolated. For that reason alone, the Earth may be spared from being swallowed by the sun. However, new research suggests that the Earth will still be swallowed by the sun due to the effects of tidal action.

Even if the Earth could escape the fate of being melted by the Sun, the water on Earth would evaporate and the atmosphere would escape. In fact, even when the Sun is still a main-sequence star, it gradually becomes brighter and the surface temperature rises slowly. The rise in the sun's temperature will cause the Earth's surface to rise in 900 million years, making life as we know it impossible to survive.

In another 1 billion years, the water on the Earth's surface will disappear completely. By that time, humanity would have been extinct.

Modern science says that the earth still has more than 4 billion years of life, and if foreign forces intervene, the life span will be even shorter.

I don't know, even if the human race is extinct, the earth should still exist.

The current lifespan of the Earth is 4.6 billion years, and it is still unknown how long the Earth will exist in the future. Here are the references. How long is the life span 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 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 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.

Theoretically, it's 4 billion years, and the earth is in the prime of life now, but it depends on the actual situation, mainly depending on the consciousness of human beings, and there are some uncertain factors, whether there are aliens or something.

To put it mildly, you're dead, and the earth isn't hanging yet. Don't worry about it.

It's up to humanity to protect the planet.