The earth may be N billion years old! 5

The Earth is about 4.6 billion years old.

4.6 billion years ago, the Earth was born. Earth's evolution can be broadly divided into three stages.

The solar system 5 billion years ago.

The first stage is the period of formation of the Earth's sphere, which is roughly 4600 to 4200 mA [million years]. When the earth was first born, it was very different from what it is today. Scientists theorize that the Earth began as a red-hot ball of liquid material, mainly magma.

Over time, the temperature of the earth's surface continues to drop, and a solid core gradually forms. The dense material moves towards the center of the earth, and the less dense material (rocks, etc.) floats on the surface of the earth, which forms a earth whose surface is mainly composed of rocks. The second stage is the Archean, Proterozoic period.

Its time limit is between 4200 and 543 MA. The earth is constantly releasing energy outward. Gases such as water vapor and carbon dioxide released by the continuous eruption of high-temperature magma constitute a very thin early atmosphere --- primitive atmosphere.

As the water vapor in the primeval atmosphere continues to increase, more and more water vapor condenses into small water droplets, which then converge into rainwater and fall to the surface. And just like that, the primordial ocean was formed.

The third stage is the Phanerozoic period, which lasts from 543 mA to the present. The duration of the Phanerozoic is relatively short, but during this period, the organisms and their flourishing, the geological evolution is very rapid, the geological processes are rich and colorful, and the geological bodies are all over the world, widely preserved, which can be observed and studied very well, and are the main research objects of geological science, and the basic theories and basic knowledge of geology have been established.

In order to prove the origin of life and the earth, various hypotheses have been proposed to explain the birth of life through experiments and speculation. In 1953, Stanley, a young American scholar, used a closed device filled with methane (CH4), ammonia (NH3), hydrogen (H2) and water (H2O) in the laboratory to simulate the environmental conditions of the primitive earth by discharging and heating, and synthesized some amino acids, organic acids and urea and other substances, which caused a sensation in the scientific community. The results of this experiment show even more convincingly that the early earth was fully capable of giving birth to living organisms, and that primitive living matter could be produced under natural conditions without life.

Some organic substances in the primitive ocean, after long-term and complex chemical changes, gradually formed larger and more complex molecules, until the basic substances that make up living organisms--- proteins, and macromolecular substances such as nucleic acids as genetic material. Under certain conditions, substances such as proteins and nucleic acids are concentrated, condensed, etc., forming a system composed of a variety of molecules, with a membrane on the outside, separated from seawater, and undergoing long and complex changes in seawater, and finally forming primitive life.

After 1000 years, the words disappeared and a new North Star appeared. After 50,000 years, global warming and glaciers are melting rapidly. 100,000 years later, the starry sky changed blood, and Mars became a human colony.

What will the Earth look like in 10 billion years?

Maybe we humans will be gone by then.

Correct answer: It can also become a sci-fi modernization, or destruction!

The Earth has been going through 4.6 billion years. As for how many years an epoch is, there is no specific norm for this, just like China, which records the year by the heavenly and terrestrial branches, and is 60 years in an era. In the Mayan civilization, an era is more than 10,000 years.

Others are also different. As for how long it will be able to exist, that's an uncertain thing!

But the life span of the sun is 10 billion years, it has been around for 5 billion years, and there are still 5 billion years to live! Within about 5 billion years, the Sun's interior will be almost completely depleted of hydrogen, and the Sun's core will collapse, causing the temperature to rise, a process that will continue until the Sun begins to fuse helium into carbon. Since helium combustion produces more energy than hydrogen combustion, the outer layers of the Sun will expand and release a portion of the outer atmosphere into space.

When the process of switching to new fuels ends, the mass of the Sun will decrease slightly, and the outer layers will extend to the current orbit of the Earth or Mars (at which point the two planets will be farther away from the Sun due to the decrease in the mass of the Sun).

Since the growth of the sun's energy is not commensurate with the increase in radius, the temperature on the surface of the Sun will be lower than it is now, turning into a red giant. After billions of years from this red giant, the helium fuel will also be depleted.

Like the first consumption of hydrogen fuel, the core of the sun contracts again and the internal temperature rises. For very large stars, this collapse leads to the fusion of carbon. However, since the Sun is not massive enough to produce carbon fusion, it will become a white dwarf.

As the internal temperature and luminosity decrease, it eventually becomes a black dwarf that does not emit light.

In the 4.5 billion years since its birth, the earth has undergone countless changes, and by studying various ancient historical relics such as rocks, animal and plant fossils on the earth, we can know what happened on the earth in the past, but can we know what will happen on the earth in the future.

A billion years from now, a day on Earth will no longer be 24 hours, but will be 28 to 29 hours, which is due to the slow self-transformation of the Earth and the day on Earth will become longer.

A billion years from now, there will be no more oceans on Earth, and the whole Earth will look like a ruin, all because the Sun will be brighter and hotter a billion years from now than it is today, when the Earth's surface temperature will reach 70 to 100 degrees Celsius, which will make all the water on Earth evaporate and light. The appearance of the Earth's continents is exposed to the ground, making their appearance obvious, and the shape of the continents has changed countless times and looks completely different from today, and the tectonic plates will stop moving at that time.

The whole Earth looks as if it is another planet entirely, the temperature and atmospheric pressure on the Earth vary dramatically, there is no longer oxygen in the air, and people have to wear spacesuits to survive on the surface of the Earth. The absence of oxygen means that there will be no living life, because the composition of the atmosphere changes, the sky is no longer blue, it looks closer to gray or brown, and you will feel that the whole air is very humid, because all the water in the sea has evaporated into the atmosphere.

A billion years from now, the sun will be brighter than it is today, and people will lose their sight if they stare at it for a long time. The color of the ground will be gray or brown, and the ocean will now be a huge basin.

If you're in it, you wouldn't have thought that the place you're in is Earth. It is very likely that the Moon is still accompanying the Earth at this time, but it is much farther away from the Earth than it is today, so from the surface, the Moon will be smaller than today, needless to say, at this time on Earth, human civilization has become history, at this time either humans have moved to other galaxies, or mankind has become extinct. The relics that once existed on the earth have disappeared due to the long-term modification of nature, and the efforts made by human beings and the mistakes made by human beings have been completely forgotten by this planet at this time.

If you stand on the surface of the earth and look at this hellish lifeless planet, you will fall into a deep sadness when you think about the prosperity of the earth in the past, and realize that nothing is as big as a planet, you cannot avoid the fate of death.

Although the earth has come to an end a billion years later, the universe has not, and other planets suitable for life were born in the universe at this time, where new life multiplied and continued, and even new intelligent civilizations were born there, and a new chapter was opened again.

Of course, all this is speculation, and as for what will become of the earth in the future, we can only wait for time to verify, but we are no longer there by then.