Chapter 1531 Hypothesis About the Cause of the Moon

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Chapter 1531 Hypothesis about the cause of the moon

‘Haha, of course, it’s all ready. The personnel, just the four of us, and the equipment and materials are a flying saucer spacecraft. 'Zhao Zhongyao looked at Qu Yuqian again and said with a smile.

‘What, just the four of us! Didn't you say you want to find more than a hundred people! Why are there just four of us now! Qu Yuqian said very puzzled after hearing what Zhao Zhongyao said.

'What's the matter, the four of us can't go on a space tourism adventure. 'Zhao Zhongyao looked at Qu Yuqian again and smiled.

Feifei and Tiantian also laughed when they heard what their father said.

At this time, Feifei looked at his mother again and said, "Mom, we are not traveling and exploring the solar system, we are going to the moon to travel and explore." '

As soon as Qu Yuqian heard her son's words, she looked back at him puzzled and said, 'Why do you say that, aren't we going to travel and explore the solar system together! '

‘Haha, we are going to travel and explore the solar system. However, we are now going to travel and explore on the moon. ’ Said Feifei.

'Why? We are no longer traveling and exploring the solar system. ’ Qu Yuqian was very puzzled after hearing what her son said.

‘Mom, we will not go to the solar system to travel and explore now, we will go to the moon to travel and explore first. After we travel to the moon, we will travel to the solar system with others. ’ Said looking at my mother every day.

After hearing Tiantian's words, Qu Yuqian looked at Zhao Zhongyao very puzzled and said, Zhongyao, tell me what's going on here. '

At this moment, Zhao Luyao looked at Qu Yuqian again and said, 'That's right, we can't travel and explore the solar system yet. Because we need to select personnel for travel and adventure, and prepare some equipment and supplies, it will take at least a month.

But now that we have nothing to do for the time being, we can go to the moon to travel and explore first. After we have explored the moon tourism. Then you can travel and explore the solar system with the team. '

When Zhao Zhongyao said this, Qu Yuqian knew what was going on. After hearing Zhao Zhongyao's words, she said happily,'Okay, since this is the case, let's go to the moon to see it first! It's just that what's so good about the moon, don't we all already know what the moon looks like. '

Although Qu Yuqian is also willing to go to the moon to see. But she also felt that there seemed to be nothing interesting on the moon. There is only one moon city built by Feitian Group on the moon. Then there are no other human buildings.

‘There are still many places to see on the moon. Although we have built a moon city on the moon, we don't know much about the moon. This time, when we go to the moon, we want to carry out a tourist adventure on the moon. Then on the moon, another tourist route will be developed.

The moon is so big, don't we just let tourists go to our moon city to see it! Why don't we take tourists to see other places on the moon. 'Zhao Zhongyao looked at Qu Yuqian again and said.

After listening to Zhao Zhongyao's words, Qu Yuqian felt that it made sense. Because they don't actually know the moon. Or should go to the moon to see. Find something that can be a travel resource. Then develop a lunar tourist route.

‘Zhongyao, what you said is very reasonable. We should go to the moon to see it first. It's just that I feel that there don't seem to be any good tourist attractions on the moon. Even if we go, I'm afraid we can't find good tourist resources. 'Although Qu Yuqian agreed with Zhao Zhongyao's point of view. But she is not optimistic about the tourism resources on the moon.

At this time, Zhao Zhongyao looked at Qu Yuqian again and said, 'Don't you think there is nothing fun on the moon. Do you feel like you know the moon well. Then tell us about the astronomical knowledge about the moon! I see how much you really know about the moon. '

When Zhao Zhongyao said this, Qu Yuqian didn't know how to answer. She looked at Zhao Zhongyao and said, 'The moon is a devastated planet with neither air nor water on it. Even gravity is very small. It is completely different from our earth. ’ Qu Yuqian said again.

'Then can you tell me some more specific data! 'Zhao Zhongyao looked at Qu Yuqian again and said.

'I can't say that. I probably know these things. ' Qu Yuqian looked at Zhao Zhongyao and said.

'It seems that you don't know much about the moon either. Zhao Zhongyao said so.

After finishing speaking, Zhao Zhongyao looked at Feifei and Tiantian again and said, ‘How are you two, do you know the moon very well?

After hearing Zhao Zhongyao's words, Feifei and Tiantian shook their heads together. After all, they both knew little about the affairs on the moon. Although they had been to Moon City, they could tell the situation on the entire moon. I can't tell.

‘Well, since you don’t know anything about the moon yet, we should go to the moon and learn more about it. But before I go, I think I should give you a few lessons first, so that you can have a comprehensive understanding of the moon. 'Zhao Zhongyao looked at Qu Yuqian and the two children again and said.

'Okay, dad, you can teach us a lesson! Let us first have a comprehensive understanding of the moon. ’ Feifei looked at Dad again and said.

Qu Yuqian also looked at Zhao Zhongyao at this time and said, "Zhongyao, then just say it!" We really should know more about the moon. '

Tiantian also looked at Zhao Zhongyao curiously, wanting to hear what new things they didn't know about the moon.

‘Okay, then I will give you a lesson on astronomy about the moon! ' After finishing speaking, Zhao Zhongyao thought about it

After a while, he started talking again.

'The Moon probably formed about 4.5 billion years ago, shortly after the Earth. There are several hypotheses about its origin, the one supported by more factual evidence is that it formed from a body the size of Earth and Mars-"Theia "The theory of the origin of a giant collision" formed by the accumulation of fragments produced by a huge collision in the periphery of the earth.

The full moon seen from the northern hemisphere of the earth has a large number of huge impact craters filled by dark volcanic basalt lava flows, forming a vast plain called "maria". In fact, there is a drop of water in the "mara". nor. Bright, ancient anorthosite plateaus and prominent impact craters are interspersed between the outer mare and the mare.

It is the brightest object in the sky after the Sun, and although it appears very bright white, its surface is actually dark, with an albedo only slightly higher than old asphalt. Because the moon is very conspicuous in the sky, coupled with the regular changes of the moon phase, it has had a significant impact on human culture since ancient times, such as myths and legends, religious beliefs, philosophical thoughts, calendar compilation, literature and art, and customs and traditions.

The moon's rotation is equal to the period of its revolution, which is known as tidal locking. So the Moon always faces the Earth with the same side. The tides of the earth's oceans are mainly due to the gravitational pull of the moon. Because the tidal force of the earth's ocean is opposite to the direction of the earth's rotation, the earth's rotation is always "braked" by an extremely weak force, which has been accumulated for a long time. There is sufficient evidence to show that the earth's rotation period is becoming more and more Slower, the time of day increases extremely slowly, about 1 second in several years; due to the reaction force of the earth, the moon is slowly getting farther and farther away from the earth, about 3.8 centimeters away from the earth every year.

The ratio of the size of the moon to the sun is similar to the ratio of the distance, so that its apparent size is almost the same as that of the sun. During a solar eclipse, the moon can completely cover the sun and form a total solar eclipse. Because the rotation period of the moon is exactly the same as its revolution period, only the moon can be seen on the earth always facing the earth with the same side. Since the early days of the Moon's formation, the Earth has been subject to a moment that slows its rotation, a process known as tidal locking. Therefore, part of the angular momentum of the earth's rotation is transformed into the angular momentum of the moon's orbit around the earth. As a result, the moon moves away from the earth at a speed of about 38 mm per year.

The origin of the moon is unclear. There are roughly three schools of thought on the origin of the moon in history. They are split theory, capture theory and collision theory.

split said. This is one of the earliest hypotheses to explain the origin of the moon. The theory of splitting holds that the moon was originally a part of the earth, but later because the earth rotated too fast, part of the material on the earth was thrown out. These materials separated from the earth to form the moon, and the large crater left on the earth is the Pacific Ocean.

This view was quickly opposed by some. They believe that it is impossible to throw such a large piece at the speed of the earth's rotation. Besides, if the moon was thrown out by the earth, then the material composition of the two should be the same. However, through the analysis of the rock samples brought back from the moon by the "Apollo 12" spacecraft, it was found that the two are very different. The age of the rocks on the surface of the moon is extremely old. The age of the rocks on the entire moon’s surface is between 3 billion and 4.2 billion years. The age of the oldest rocks on the earth’s surface is limited to the 3.8 billion-year-old metamorphic rocks exposed in individual areas, while the Pacific Ocean The age of rocks on the ocean floor is extremely young, which completely contradicts the theory of "split theory".

Capture said. This hypothesis holds that the moon was originally just a moon-sized asteroid in the solar system. Once, because it was running near the earth, it was captured by the earth's gravity, and has never left the earth since then. There is also a point of view close to the capture theory that the earth continues to accrete matter that has entered its own orbit. Over time, more and more things are accreted, and eventually the moon is formed. However, some people pointed out that for a planet as large as the moon, the earth may not have such a powerful force to capture it.

Collision said. This hypothesis believes that in the early days of the evolution of the solar system, a large number of "planetes" were formed in the space of the solar system, and a celestial planetesimal equivalent to 0.14 times the mass of the earth was first formed.

During their respective evolution processes, these two celestial bodies respectively formed a metal core mainly composed of iron and a mantle and shell composed of silicate. Since the two celestial bodies are not far apart, the chances of encountering are great. By chance, the small celestial body hit the earth at a speed of about 5 kilometers per second. The violent collision not only changed the motion state of the earth and tilted the rotation axis of the earth, but also caused the small celestial body to be broken by the impact, the silicate shell and mantle were heated and evaporated, and the expanding gas carried a large amount of shattered particles at a great speed. Dust flies away from the earth.

The material flying away from the earth is mainly composed of the mantle of the colliding body. Most of the earth's mantle and crustal materials were heated and evaporated after being hit by a huge impact, and the expanding gas carried a large amount of crushed dust away from the earth at a great speed. The metallic core, which separated from the mantle when the impactor broke up, was slowed down by expanding gas flying away and accreted onto Earth in about 4 hours. The gas and dust flying away from the earth did not completely escape the gravitational control of the earth, and combined through mutual accretion to form an almost molten moon, or formed a ring first, and then gradually accreted to form a partially molten large moon.

This version is generally accepted. This model clearly explains that, compared with the average composition of the moon and the average composition of the earth, the moon is relatively poor in iron and volatile matter, and the density of the moon is lower than that of the earth. The isotopic composition of some elements with the contrasting characteristics of the "gene" of the earth and the moon, such as the isotopic composition of oxygen, chromium, titanium, iron, tungsten, silicon, etc., the measured values ​​of the moon and the earth are consistent within the error range, indicating that the moon is The "daughter of the earth." For 4.5 billion years, the earth has always carried its own daughter by its side, and the moon has always been accompanied by its own daughter.

Together with their own mother, they have experienced a long and barren age of 4.5 billion years. 'Zhao Zhongyao looked at his wife and children, and told him something about the moon that he knew.

After hearing what Zhao Zhongyao said every day, Qu Yuqian and Feifei immediately became curious about the moon again. After all, without hearing these things, they feel that there is nothing attractive on the moon. But after listening to it, I really wanted to go to the moon to see it.

‘Zhongyao, hearing what you said, I really want to go to the moon to see it. ' Qu Yuqian looked at Zhao Zhongyao and said.

'Dad, let's go right away! I really want to go to the moon and have a good look. I worked there for two months before, and I didn't go to the moon to see it! ’ Feifei also looked at his father and said.

'Dad, let's go to the moon! I also want to see what it looks like on the moon. Although I worked on the moon for two months before, I don't seem to understand the moon at all. 'Tian Tian also looked at Dad and said.

'Okay, let's go now. 'After hearing what his wife and children said, Zhao Zhongyao agreed to them and went to the moon immediately.

In this way, Zhao Zhongyao came out of the house with his wife and children. Then came the company headquarters. Zhao Zhongyao was driving a flying saucer spacecraft. They took this UFO spacecraft together and flew to Moon City again.

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