Chapter 1810 Zhixing and Comet

&b;&b;&b;&b;Chapter 1810 Zhixing and Comet

&b;&b;&b;&b;Feifei and Tiantian looked puzzled after hearing what their father said. Because they didn't understand what Dad meant by that. So Feifei asked again, 'Dad, why did you say that, and what basis do you have? '

&b;&b;&b;&b;At this time Zhao Zhongyao said again,'That's it, I feel that life on our earth requires at least two conditions. First, there must be a lot of water on the earth, because water is the source of life, and without water, life would be impossible to produce. Early life was produced in the ocean, and the water in the ocean was obviously not produced by the earth itself.

&b;&b;&b;&b; But the water on the earth comes from there. These are two views. One point of view is that the water on the earth is the water produced by the combination of hydrogen and oxygen produced after volcanic eruptions.

&b;&b;&b;&b;I don't think this kind of view is very reliable. Although, this form of volcanic eruption may also produce some water. But the water produced in this form is very small. That simply doesn't explain how much water there is on Earth.

&b;&b;&b;&b;Because the earth is, in a sense, a water polo. As the saying goes, there are three mountains, six rivers and one field. This shows that water on the earth is the most natural resource. So much water cannot be formed by volcanic eruptions on the earth.

&b;&b;&b;&b;If this is the case, then there should be liquid water on many planets in the solar system. But the key is that there is no liquid water on many planets in the solar system. Only the earth has liquid water.

&b;&b;&b;&b;This shows that the early water on the earth was not produced by the earth itself. Rather, it was produced by some very accidental circumstances.

&b;&b;&b;&b;Now there is a saying that the early water on the earth was caused by one or several huge meteor showers. And the meteorites that cause this meteor shower are not ordinary meteorites, but some ice meteorites. That is, fragments of those comets.

&b;&b;&b;&b;The early water on the earth must have been formed by countless ice meteorites falling to the earth. Because in the solar system, there are many comets orbiting the sun. Of course, when they approach the sun, they will be scorched by the sun, and then they will develop a long comet tail. In fact, this long comet tail is an ice meteorite composed of many small ice cubes.

&b;&b;&b;&b;The comet tail of a comet may be several million kilometers to hundreds of millions of kilometers long. In this way, when the comet becomes a huge celestial body with a long tail, it becomes a super big broom. In ancient times, our ancestors called this kind of comet with a long tail the broom star.

&b;&b;&b;&b;The reason why our ancients called the comet the broom star is not only because it looks like a big broom. What's more, when it appears, it may create some disasters on the earth. Because of this, the ancients felt that when the broom star appeared, it was a bad celestial phenomenon, and some disasters might happen on the earth.

&b;&b;&b;&b;Of course, there is a scientific reason why the ancients thought so. Of course, this scientific truth of the ancients was not obtained by astronomical observations, but only by some experience.

&b;&b;&b;&b;Because when this kind of comet appears, it is possible to cause meteor showers to appear in some places on the earth. If a meteor fell to the surface of the earth, it would definitely cause serious damage to people and buildings on the ground.

&b;&b;&b;&b;Because of this, the ancients called this comet with a long tail the broom star. Because as soon as this kind of celestial phenomenon appears, it indicates that a disaster will occur somewhere under the earth.

&b;&b;&b;&b;But in fact, we modern people know that this kind of comet is not necessarily related to the disaster on the earth. Even if the huge comet tail of a comet sweeps across the earth, it will generally not cause any disasters, and it will only let us enjoy a beautiful meteor shower.

&b;&b;&b;&b;Actually, we ancients believed that the appearance of comets would cause disasters, which is not only unscientific. And calling a comet a broom star is a misunderstanding of comets, and even disrespect for comets.

&b;&b;&b;&b;You know, comets are the heroes of our earth. It is precisely because in ancient times, comets swept across the earth, causing a large number of ice meteorites to fall on the earth, so that a huge ocean was formed on the earth.

&b;&b;&b;&b;Because there are oceans on the earth, there are the basic conditions for life. If there were no huge oceans on the earth in the early days, it would be impossible for the earth to give birth to life.

&b;&b;&b;&b;But there are some huge oceans alone, and life cannot be born on the earth. Because life is a carbon-based life with carbon as the main element. And having a large amount of carbon element on the earth is a key step for ordinary matter to become organic matter.

&b;&b;&b;&b;In the early earth's oceans, there was not a lot of carbon. Then suddenly a lot of carbon was produced. Where did the carbon come from. Obviously related to this carbonaceous chondrite in the solar system.

&b;&b;&b;&b;It is precisely because the early earth was attacked by comets that oceans arose. After that, after being attacked by carbonaceous chondrites many times, organic matter gradually appeared in the ocean. These organic substances slowly underwent oxidation-reduction reactions, and thus life evolved slowly.

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&b;&b;&b;&b;It can be said that there are two most important reasons for the emergence of life on the earth in the early days. One is that the earth was attacked by a severe comet in the early days. After that, it was attacked by a serious carbonaceous asteroid. After these two important attacks, the earth has become a magical planet that can breed life. Since then, the earth has embarked on an evolutionary path completely different from other planets in the solar system.

&b;&b;&b;&b;From this point of view, can we see that this kind of carbonaceous planet like Pallas is the key material that caused the early life on the earth to evolve.

&b;&b;&b;&b;Now we call this carbonaceous grain planet Pallas, which is also very appropriate. Because it is precisely because of this kind of carbon particles that planets and comets have created the life system on the earth.

&b;&b;&b;&b;The reason why intelligent life appears on our earth is the result of the cooperation between comets and wisdom stars. '

&b;&b;&b;&b; Now looking at Feifei and Tiantian, Zhao Zhongyao said something he knew about the evolution of early life on Earth.

&b;&b;&b;&b;After hearing what their father said, Feifei and Tiantian had a comprehensive understanding of the carbonaceous asteroid in front of them-Pallas.

&b;&b;&b;&b;'Dad, so say. The Pallas star in front of us has a lot to do with the formation of life on Earth. Then the fourth amethyst gemstone we are looking for is also on this Pallas star! ’ After Feifei heard what his father said, he said this again.

&b;&b;&b;&b;After hearing Feifei's words, Zhao Zhongyao said,'This is also very possible. Since this Pallas star is so miraculous, there might be the amethyst gem we are looking for on this asteroid. After all, this amethyst gem is also very magical. Only magical planets can produce magical substances. '

&b;&b;&b;&b;'Dad, let's hurry up and have a look on this Zhishen star! ’ After hearing what Dad said, Feifei said this again.

&b;&b;&b;&b;'Okay, let's quickly go to this Zhishen star to have a look. Maybe, we can find the fourth amethyst gemstone we need on this Pallas star. '

&b;&b;&b;&b;As Zhao Zhongyao said, he drove the spaceship towards this Pallas star. They are now only a few hundred kilometers away from this Pallas planet. Such a short distance, for a flying saucer spacecraft, it can fly over in the blink of an eye.

&b;&b;&b;&b;Pallas is a relatively large asteroid with a diameter of more than 500 kilometers. It's just that the shape is so irregular that you can't tell what kind of asteroid it is.

&b;&b;&b;&b;Zhao Zhongyao is now driving the spaceship, and he flew over Pallas. They are only tens of meters away from the surface of Pallas.

&b;&b;&b;&b;From this distance, you can clearly see the terrain on Pallas. Zhao Zhongyao and the others chose the side of Pallas facing the sun. Of course, it was daytime on this side, so we could naturally see the situation outside.

&b;&b;&b;&b;Zhao Zhongyao and Feifei saw that the surface of Pallas was some rocks with yellow spots. These rocks are also known as carbonaceous chondrites.

&b;&b;&b;&b;At this moment, Feifei looked at Zhao Zhongyao and said, 'Dad, should we land directly on this Zhishen star to have a look! '

&b;&b;&b;&b; Zhao Zhongyao thought for a while and said, 'I don't think we need to land on this Zhishen star. Since we are looking for amethyst gemstones, we can fly the spaceship directly over this asteroid.

&b;&b;&b;&b;Although this asteroid is not very big, its diameter is only more than 500 kilometers. But if you walk on this asteroid, its area is still very large, and it is impossible to turn the surface of this asteroid once you walk for a few months.

&b;&b;&b;&b;In my opinion, we don't need to land on this asteroid, we just need to drive the spacecraft to fly a few laps over this asteroid. In this way, we can see whether there is an amethyst gemstone on this asteroid. If we look for it on the ground, it will be very troublesome. '

&b;&b;&b;&b;When Zhao Zhongyao said this, Feifei nodded and said,'Dad said yes, so let's look for it on the spaceship! '

&b;&b;&b;&b;So, Zhao Zhongyao drove the spaceship again and began to fly around this Zhishen star. Although the diameter of this Pallas is more than 500 kilometers. But for a flying saucer spacecraft, the surface area of ​​this asteroid is nothing at all. The flying saucer spacecraft can fly a few times on this asteroid in a few minutes.

&b;&b;&b;&b;But Zhao Zhongyao and the others were looking for amethyst gems. Since they are looking for something, they can't fly too fast, they must fly slower to be able to see the situation on the ground clearly. If you fly too fast, it is impossible to see the situation on the ground.

&b;&b;&b;&b;But Zhao Zhongyao drove the spaceship, and after flying a few laps on this Pallas star, he didn't find anything special, and felt that there might be amethyst gems. The surface of the entire asteroid is some carbonaceous meteorites with yellow markings.

&b;&b;&b;&b;At this moment, Feifei looked at Zhao Zhongyao and said, 'Dad, is there no amethyst gemstone we are looking for on this Zhishen star? There is nothing special about it at all. If there is no special place, how could such a magical thing as amethyst gemstone be born. '

&b;&b;&b;&b;At this moment, Zhao Zhongyao thought for a while and said,'It shouldn't be! This is Pallas, the great asteroid that created life on our earth! Since she is so great, then she should be able to give birth to amethyst gems! Also, I read the star map in the original amethyst gem before.

&b;&b;&b;&b;The above shows that among the three well-known asteroids in the asteroid belt, there should be an asteroid with the fourth amethyst gem we are looking for. Now that we have found Vesta and Juno, there is no amethyst gemstone on those two asteroids, which means that there must be an amethyst gemstone on Pallas, but we haven't found it yet. That's all. '

&b;&b;&b;&b;When Zhao Zhongyao said this, Feifei said, 'Then where else can we look for it! We didn't search the entire asteroid. '

&b;&b;&b;&b;After hearing Feifei's words, Zhao Zhongyao said again,' Didn't we search too carefully just now? This time, we should find out more carefully. '

&b;&b;&b;&b;After hearing this, Feifei said again, ‘That’s right, didn’t we search too carefully just now, especially on the side of Pallas that faces away from the sun. We can't see what's on the ground at all. Should we look for it on the back of Pallas? '

&b;&b;&b;&b;Zhao Zhongyao shook his head and said,'The amethyst gemstone we are looking for is unlikely to be on the back of Pallas. '

&b;&b;&b;&b;'Why? ’ Feifei was still a little puzzled.

&b;&b;&b;&b; Zhao Zhongyao looked at Feifei a little puzzled, so he explained, 'Because amethyst gemstone is a magical substance. Since it is a magical substance, it is impossible for it to be facing away from the sun. Because it needs to attract the essence of the sun and the moon to form. The far side of any asteroid is a place where the sun is not visible. How could such a place form a magical amethyst gemstone!

&b;&b;&b;&b;Also, are the three amethyst gemstones we found before facing the sun? Only places with sufficient sunlight can form and breed magical amethyst gemstones. '

&b;&b;&b;&b;'Dad, so it is impossible for this amethyst gem to be on the back of Pallas, so we should go to the front of Pallas to find it. '

&b;&b;&b;&b;After listening to what Dad said, Feifei felt that what Dad said made sense. Since the magical amethyst gems will only appear on the ground where sunlight can often shine, it is unlikely that the magical amethyst gems will be bred on the back of Pallas.

&b;&b;&b;&b;'That's right, we don't have to go to the back of Pallas to look for it anymore. Originally, we couldn't see the ground clearly from the back. We only need to look for the front of Pallas. '

&b;&b;&b;&b;After Zhao Zhongyao finished speaking, he drove the spaceship to fly above Pallas again, and they continued to search for places where amethyst gems might be bred.

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