There are only 100 million years left
According to media reports, in a program, Wang Jiyang, an academician of the Chinese Academy of Sciences, once said: At present, our earth can still survive for 4.5 billion years, and then this is not the case. Even though the Earth has 4.5 billion years left, why do we have only 100 million years left for humanity?
Immortal planet
As we all know, planets do not exist, unlike stars, stars need to release hydrogen thermonuclear fusion, to produce huge energy, in turn to fight against gravitational compression, after all, the greater the mass, the greater its gravitational force, but the planet is different.
Most of the planets are composed of dust in the universe, which is composed of a variety of gases and extremely dense heavy metal material, which also constitutes two major categories of planets, which are terrestrial planets and gaseous planets, and most of the terrestrial planets are composed of rock dust.
Although they are not massive, they have an infinitely long lifespan, and if nothing else, the natural lifespan of any terrestrial planet is immortal. Gaseous planets differ from terrestrial planets, which are made up of large amounts of gas.
For example, hydrogen, helium, etc., the mass of these gaseous planets is very large, which also means that once these gaseous planets, at some stage in the future, swallow a large amount of material and gas, when their mass reaches 75 times the mass of Jupiter, it will produce hydrogen thermonuclear fusion, so a brown dwarf star will be born.
Eight planets
In the solar system, among the eight planets, there are four major terrestrial planets and four atmospheric planets, the four major terrestrial planets are mercury, Venus, Earth and Mars, and the four atmospheric planets are Jupiter, Saturn, Uranus and Neptune.
And the terrestrial planet, its mass is very small, do not have to fight against gravitational compression, so it does not need to produce energy and release energy, it will only be aimlessly rotating around its parent star in the universe, and this is our earth, so in a sense, the earth has no lifespan.
Geothermal energy
So the academician is wrong? In fact, it is not, the academician refers to the life of the earth, refers to the energy, that is, the earth's geothermal resources, geothermal resources you may be very unfamiliar, but earthquakes, volcanic eruptions belong to geothermal energy, these energies are abnormally violent, of course, if used rationally, these energies are inexhaustible.
It is worth mentioning that although the earth gives us 4.5 billion years of time, for life on earth, this time will be shortened to 100 million years. Because the sun doesn't give us that much time, the sun is the mother of everything on earth, because no living thing can leave the sun, remember any creature.
The sun is expanding
The sun we see now is actually a middle-aged sun, its mass and volume are not large, and the energy it releases is just suitable for the development of life on the earth. But as the sun's energy gradually runs out, it will become larger and larger.
The Sun is a small-mass star, but it still has to fight gravitational compression. In the interior of the Sun, the thermonuclear fusion of hydrogen forms helium, while the thermonuclear fusion of helium forms a variety of elements such as oxygen, and in this high temperature and high pressure environment, the elements will continue to fuse until they reach iron.
Iron atoms want to achieve fusion, need extremely large amounts of energy, but the sun itself can not meet this condition, so a large amount of iron will accumulate in the core of the sun, as more and more iron accumulation, the sun will also begin to expand, 100 million years later, the volume of the sun will increase by about 1.25 times, but it will not only increase in volume, the impact is also catastrophic.
The world in a hundred million years
In a hundred million years, the sun in the sky will be 1.25 times larger than it is now, and the temperature on the earth's surface will reach more than 100 degrees Celsius, at this time, the earth, there will be no oceans and any water resources, living things will be roasted by fire in the hot heat, and life will also draw the symbol of the end.
What is more worrying is that the volume of the sun has increased, but the mass is decreasing, which is likely to mean that the eight planets will be reshuffled, the balance of the entire solar system will be broken, and the chaotic solar system is likely to trigger celestial collisions and other events.
This article summarizes
But humans may have been gone by then, so we don't have to worry. According to the current time, there is not much time left for humanity, and we only have 100 million years left.