How long does the earth have to live, and how long does the earth have to live

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. From which side of space will the Earth be destroyed by a blow from the space? When will the earth die?

At least we're all gone, and the earth won't perish.

The life span of the earth is quite long, now it is 4.6 billion years old, and it has to live for at least 50 years, but this does not mean that humans can live on the earth all the time, and in about another 100 million years, the earth will no longer be suitable for human habitation.

Humanity is now plagued by the problem of global warming, and according to scientists' estimates, a temperature rise of between -2 degrees will cost humanity a lot. But what we need to know is that the efforts we make are to change the temperature of the earth to a small extent, but to a large extentThe warming of the planet is inevitable.

We all know that the Earth's energy comes mainly from solar radiation. Solar radiation, on the other hand, relies on nuclear fusion reactions in the sun's inner core. The process of the main nucleus is as follows:

4 hydrogen nuclei through nuclear fusion reaction to generate 1 helium nucleus, in the process will release a large amount of energy, but because the sun's own gravity is very strong, the nuclear fusion is bound to the position of the sun's inner core, but also to ensure that the nuclear fusion reaction will not be too violent, gravity and nuclear fusion external pressure form a dynamic equilibrium.

But what we need to know is that the greater the mass, the greater the gravitational pull, and as a result of the fusion reaction, the sun has 4.2 million tons of mass to be converted into energy every second, which leads to a lot of mass loss. As time goes by, the gravitational pull becomes smaller and smaller, the ability to bind the fusion reaction decreases, the fusion reaction becomes more and more intense, the energy released increases, and the solar radiation received by the Earth increases.

Scientists have calculated that in 1 billion years, the earth will be too hot for any living creatures to live, and the earth will become a desert.

Scientists have found that due to the continuous increase in temperature, after 500 million years, the temperature of the earth will be enough for plants to not survive, and at that time, the plant-based food chain will collapse, and human beings need to rely on this food chain to survive, so it is actually difficult for human beings to survive the threshold of 500 million years later.

It is estimated that many people will think that 500 million years and 1 billion years are actually not much different, and they are too long for human beings. But in fact, in 100 million years, there is still a threshold, and that is that the Milky Way will merge with the Sagittarius dwarf ellipsoid galaxy. Every time a galaxy merges, there is an extreme climate on Earth that leads to a mass extinction event.

Therefore, if humanity still exists in 100 million years, it will definitely encounter this huge challenge, and it is difficult to say whether it will be able to cross the past. Not to mention, this 100 million years is also full of hardships, large-scale nuclear wars, large-scale biochemical wars, climate changes, asteroid impacts on the earth and other reasons may lead to the extinction of human beings.

At present, our earth's atmosphere is decreasing, and there are many people who are looking for this problem, and I will say my personal opinion here, in fact, why the earth's atmosphere is decreasing at present, my personal opinion is. Because the temperature of the center of the earth is falling, there are many reasons for the decline, volcanic eruptions, and a large amount of underground heat energy is used. For other reasons, the central temperature of the earth is actually the power of the earth, just like an electric fan, if it rotates slowly, the wind will be smaller, and the affected places will be less, and the reason is the same.

If I'm not mistaken. In the future, our day will be greater than 24 hours, and the gravitational pull of the earth will weaken, then the gravitational force between the earth and the moon will be out of balance, and in the future, the moon will deviate from its original orbit, or the earth will deviate from its original orbit, until a certain time. The Moon deviates from the gravitational range of the Earth, and at that point, the Earth or the Moon will disappear like a meteor in the sky.

But for now, don't worry. This is not going to happen in the next few hundred years. There are 3 endings for the future of Earth.

We can scientifically calculate the approximate time of the destruction of the earth.

1. The Earth and the Moon are still within the gravitational range. But the atmosphere is decreasing, and after a certain period of time, the atmosphere may disappear all at once. Until then.

The earth is in a vacuum. By that time, all living things on Earth will be extinct. Earth will become a death star.

At present, as long as we know the thickness of the earth's atmosphere and how much it decreases every year, we can roughly calculate how much life the earth still has. It can also be said that the lifespan of all living things on the earth has passed.

2 The Earth's atmosphere is still there because the gravitational pull of the Earth and the Moon cannot attract each other. The moon flies out of its original orbit, and at that time, the earth will speed up, and the accelerated rotation means that the earth will erupt, tsunami, **, etc., causing the earth to collapse, or decompose in place, or like a meteor.

In March, after the moon deviates, the earth will rotate faster, and it may collide with the gravitational pull of a similar star, which may be Mercury. Probably the sun. Or Jupiter. It's a possibility.

How long does the Earth live?