How many years does the earth have left to live??? How old is it???

It is necessary to protect it well Age: 4.6 billion years Revolution period: days Rotation period:

23.Hours: 56 minutes, 4 seconds (mean solar time) Volume: 1,083.2 billion cubic kilometers Mass:

60,0000 billion billion tons Average density: grams cubic centimeters Equatorial radius: kilometers Pole radius:

km Surface area: 100 million km² Ocean area: 100 million km² Atmosphere:

Main Components: Nitrogen (and Oxygen (21%) Earth's Crust: Main Components:

Oxygen (47%), silicon (28%) and aluminum (8%) Satellites: One (Moon) Earth is one of the eight planets in the solar system and is inhabited by humans. There are the necessary conditions for human survival on Earth:

Sunlight, air, water, environment, resources, etc. How long does the earth 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 and refined, turn from white to orange and then to red, and finally turn into a dark star that was silent, but its brilliant life was gone. 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 the Earth, has not been discovered, although many scientists believe it exists.

Remember.