How did the moon come? Chinese scientists find new evidence for lunar collision

The earth was born 4.6 billion years ago, and the moon is the only natural satellite of the earth. It may also appear soon after the birth of the earth. The moon has accompanied the earth for billions of years. Therefore, after the appearance of human beings, all kinds of illusions about the moon have never stopped.

The moon has always had different feelings in people’s hearts. From many beautiful poems and legends about the moon in ancient China, we can see the position of the moon in people’s hearts. Because there was no developed science and technology in ancient times, nature could only observe the moon with naked eyes, and could not really understand what the moon was and what was on it?

With the development of science and technology, the appearance of astronomical telescopes has given us the ability to observe the moon initially. At this time, we really understand that the moon is actually a satellite of the earth. It is not as beautiful as it is described in myths and legends. On the contrary, it is a very barren planet. Apart from craters, there are countless craters.

When people have a new understanding of the moon, a new problem arises: the origin of the moon, no planet can appear out of thin air, it must have its roots, many planets in the solar system have their own satellites, but the earth’s moon is different from other satellites, the biggest difference is that the size of the moon is too large.

Scientists have observed the satellites of other planets, and found that the ratio of them to the main planet is very large, so that the satellites can run stably in the orbit of the planet. If the size and mass of the satellites are too large, it is very likely that they can not run stably in the orbit of the planet, and finally hit the surface of the planet.

This is the case with the satellites of other planets in the solar system, but the moon is the only exception. The volume of the moon is 1 / 49 of the earth’s, and the mass is one eighth of the Earth’s. This ratio between planets and satellites is an incredible data. Scientists have not found this situation in the satellites of other planets.

The size of the moon is so large that it should not be able to become a satellite of the earth, and it has been running with the earth for billions of years. Therefore, scientists are greatly interested in the origin of the moon. For this reason, the scientific community has put forward various versions of the origin of the moon, and the theory of large lunar collision is supported by more scientists.

More scientists speculate that about 4.5 billion years ago, when the earth was still in an unstable state, a Mars sized star hit the earth, and the huge impact force knocked out a piece of the earth’s material, and the impact of these materials aggregated to form the moon, which was in a stable orbit and became the earth’s satellite.

If the moon is a 4.5 billion year old star and other stars collide with the earth, then the moon is actually the twin sister of the earth. The material composition and element composition of the moon are very likely to be very similar to the earth It’s the same.

If you want to get the mineral samples of the moon, you have to land on the moon to take samples. This glorious mission was realized 50 years ago by American astronaut Armstrong. When the astronauts landed on the moon and returned to earth, they also brought back hundreds of kilograms of lunar rock samples. Through the study of these rock samples, scientists have made an amazing discovery: the original moon It was really hit by a Mars sized object 4.5 billion years ago.

Although scientists know the origin of the moon through the analysis of lunar rock samples, it is still a mystery what the process of the formation of the moon was like when a star hit the earth 4.5 billion years ago. Over the past 50 years, scientists all over the world have been searching for all kinds of clues, trying to restore the context of the great collision.

The research team of planetary chemistry at Zijinshan Observatory of the Chinese Academy of Sciences published a new research result on the “scientific report” online on April 5. Researchers found the largest fractionation effect of chlorine isotopes in the solar system so far in three lunar meteorites. It is reported that the huge fractionation effect of chlorine isotopes can only be produced through intense high-temperature and high-energy processes, which confirms that the moon originated from a tragic collision event.

Through international cooperation, researchers at Zijinshan Observatory have discovered a huge fractionation effect of chlorine isotopes in apatite, a chlorine bearing mineral in three lunar meteorites, using the advanced instruments and equipment of California Institute of technology. Chlorine is a kind of volatile element in nature, which is easily lost in the process of high temperature, accompanied by isotope fractionation. Scientists have found isotopic fractionation effects of other volatile elements (such as potassium and zinc) in lunar samples, which have been used as hard evidence for the theory of lunar collision.

According to the latest research results, scientists have speculated on the theory of large lunar collision. 4.5 billion years ago, a Mars sized star hit the earth violently. At that time, the earth may still be in the process of planet formation and stability, and its structure is not very stable. The huge impact force produced hundreds of kilometers of large debris, which interacted with each other in space Impact melting, under the high temperature, the impact of all kinds of materials began to re aggregate, slowly forming a new asteroid – the moon.

In addition to the material that was hit by the earth, the material that hit the earth’s star also constitutes the moon. Therefore, although the mineral composition of the moon is very similar to that of the earth, it is not exactly the same. There are also some very scarce materials on the moon, such as helium-3, which is the most ideal fuel for nuclear fusion reaction, but the earth’s reserves are very small Rare, but the helium-3 reserves on the moon are estimated to be more than 1 million tons.

It can be seen that the moon is not only the only satellite on the earth, but also an important resource exploitation base for human beings in the future. With the rapid development of human science and technology, it is not difficult to establish bases and cities on the moon in the future. The moon in the future may become the second planet for human migration and the most important tourist planet for human beings in the future .

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