How old is our earth? How long can you 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 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.

The current life span of the earth is about 4.6 billion years, and the sun can live for another 10 billion years, so the life span of the earth is about 14.6 billion years.

In 1983, several mineral grains aged 4,142 billion were found in Australia. This suggests that the Earth's crust began to form around 4 billion years ago. Of course, this is not the age of the Earth, because before the formation of the Earth's crust, the Earth passed through a period of surface in a molten state.

Scientists believe that with the addition of this period, the age of the Earth should be 4.6 billion years.

How many more years can the earth live, scientists** The life span of the sun is 10 billion years, and the age of the earth is now 4.6 billion years, if you do not consider the impact of human or other factors on the earth, the result of the earth's life at the end of its life will be swallowed by the expanding sun.

Origin of Earth Formation:

History of the Earth. Very long. According to the measurements of radiocarbon dating, the solar system.

It was formed about 6.5 billion years ago, while the native Earth was formed about 6.5 billion years ago. Theoretically, the formation of the Sun began with the gravitational collapse of a huge cloud of hydrogen molecules 6.5 billion years ago.

The collapsed mass is mostly concentrated in the center, forming the sun.

The rest of the part rotated and flattened to form a protoplanetary disk, which in turn formed planets, moons, asteroids, and comets.

Meteoroids and other small bodies of the solar system. The nebula hypothesis asserts that the microplanets that form the Earth originate from the massaching masses of gas, ice particles, and dust with a diameter of 1 to 10 kilometers that are left over from accretion and collapse.

These materials grew over 10 million to 20 million years to form the native Earth. The nascent earth's surface was made up of magma.

composed of the "ocean".

The above content reference: Xinhuanet - How long is the life of the earth? Popular Science China.

The above content reference: Encyclopedia - Earth.

The Earth has lived for 4.6 billion years and has 50 years to live, but with the constant change in temperature, within 100 million years, the Earth is no longer suitable for human life.

Dizzy, what is your problem, strictly speaking, the earth can't live for a year, and the earth is not alive in the first place.

Scientists** The life span of the sun is 10 billion years, and now it has passed 5 billion years, and in 5 billion years the sun will become a white dwarf, I will talk about the details later.

The current age of the Earth is 4.6 billion years, and if we do not take into account the influence of human or other factors on the Earth, the result of the Earth's life will be swallowed up by the expanding sun. The details are also said later.

So what is the human factor? That is to say, human beings have wantonly deforested, polluted water resources, emitted polluting gases, and even conducted nuclear tests. If these are serious, they will have a devastating impact on the planet.

There are other factors, and the other factors are comets, asteroids hitting the Earth, and so on. It could also lead to the destruction of the planet.

Without further ado, let's talk about the evolution of the sun.

The life span of the sun is 10 billion years, and now it has passed 5 billion years, and in about another 4 billion years, the hydrogen used for nuclear fusion in the interior of the sun will be exhausted, and at the same time the nuclear fusion of the helium nucleus will begin, at this time the sun will begin to expand, and in about a billion years, the outer periphery of the sun will expand beyond the current solar system Mars, and then the celestial bodies including Mars will be swallowed, and of course the earth will be no exception, at this time the sun will be on the verge of death. The Sun then undergoes a gravitational collapse and becomes a celestial body the size of the Earth, called a white dwarf......At this point, the sun will die, and our planet will cease to exist.

Of course, don't worry, by that time, human science and technology will be unimaginably advanced, and I am afraid that we will have already left the earth and moved to other planets.

I played all of the above myself, and you only give 5 points ......,9,

About 1 billion years, by that time the temperature inside the earth will drop to the point where it is not enough for any living thing to survive, the sun still has about 5 billion years of life, and the sun as a star will inevitably lead to an increase in mass aggregation and gravity when it dies, and then it will not only radiate light that is difficult for the life of the earth to survive, but also swallow up all the surrounding planets, so the earth will not live for 10 billion years.