Chapter 1485: Oort Cloud

The first thousand five hundred and twenty chapters of Oort Cloud
Zhao Zhongyao knew that only when the safety work was done properly could he proceed with space exploration. If safety is not done properly, space exploration will be impossible. Zhao Zhongyao knew that what they were doing now was to make them safer when exploring space.
In order to ensure that you will not encounter any problems when exploring space. Zhao Zhongyao decided to design an expedition route first. Then first launch some detectors. Let the detector find the way first.
Zhao Zhongyao and the others are already familiar with the launch of the detector. Just to design what kind of adventure route. Zhao Zhongyao wanted to discuss with the two children.
‘Feifeitiantian, what kind of tourist route do you think we should design. Zhao Zhongyao looked at Feifei and Tiantian and said.
After hearing what Zhao Zhongyao said, Feifei said, ‘Of course, all the major planets in the solar system must be explored. We want to mine, and we must mine on the big planet. ’
‘Yes, if we want to mine, we still have to mine on the big planet. Only in this way can we get more ore samples. Said the same every day.
‘Okay, let’s discuss the route of our travel adventure this time! After discussion, we can start launching unmanned detectors. Zhao Zhongyao looked at the two children and said.
‘I think we’ll start with the moon this time, then go to Venus, Mercury, then Mars, Jupiter, Saturn, Uranus and Neptune. After that, I have to visit Pluto, who was expelled from the planetary family. After that, we have to take a look at the outer solar system. Feifei looked at Zhao Zhongyao and said.
‘Yes, this time, we will not only look at the inner solar system. Also go to the outer solar system. "He looked at Zhao Zhongyao and said every day.
After hearing the words of the two children, Zhao Zhongyao said, ‘Okay, just as you said, we will visit the eight planets and the outer solar system. ’
Qu Yuqian did not speak for a long time. Now I look at Zhao Zhongyao and say, ‘then we should look at the Kuiper Zone, are there many asteroids there? ’
After hearing Qu Yuqian's words, Zhao Zhongyao also said, ‘Of course, we must go to the Kuiper area to see. Not only to see the Kuiper area. We will also have a look at Oort Cloud. That is the final stop we are going to this time. ’
Feifei and Tiantian were also very curious when they heard what their father said. Feifei said again, ‘dad, does Ault cloud really exist! Will it be just a legend. ’
'Yes! Dad has always been just a guess. Who knows if such a place really exists. Said the same every day.
‘Is it just a guess. This time we are going to take a look at this place. If there are not many dirty snowballs, it means that this Oort Cloud is just a guess. If there are many icy comets, it means that the Oort cloud is real. If we discovered the Oort Cloud this time, we would have made a great contribution to the astronomical cause of our earth human beings. Zhao Zhongyao looked at the two children and said.
‘Dad, why do you say that? Is this Oort Cloud really important to us? Feifei has also heard about this Oort Cloud. But he didn't understand what this Oort cloud was important to earth humans.
'Yes! Dad, do you know this Oort Cloud well! Then can you explain it to us. ’He looked at his father and said every day.
‘Ok, then I’ll explain to you something about this Oort Cloud! Zhao Zhongyao looked at Feifei and Tiantian and said.
After hearing what Zhao Zhongyao said, Qu Yuqian was also a little curious, so she sat next to the two children, wanting to listen to Zhao Zhongyao talk about this Oortyun together.
Zhao Zhongyao then told the children something about this magical Oort Cloud. Feifei, Tiantian and Qu Yuqian listened very carefully.
Next, Zhao Zhongyao talked about some things about Oort Cloud.
‘To talk about this Oort cloud, we’re going to start with the weird celestial body of the solar system like comets. Generally speaking, ordinary planets are spherical. It is the same whether it is a large planet or a small planet. It's almost a spherical shape. Of course, the smaller the planet, the less standardized its rules. Because small planets are always hit by other asteroids. So their shape is difficult to be a round sphere.
The big planets are different. Large planets are large due to their own size. When an ordinary asteroid hits a large planet, it will not have a big impact on the shape of the large planet. The large planet will still be a relatively round ellipse.
But asteroids are different. The asteroid itself is relatively small. If it is hit by another planet, it will definitely change some shapes. Let the shape of the asteroid be weird. It is difficult to have a relatively round shape.
But no matter what. Whether it is a large planet or a small planet. As long as it is a rocky planet, it is basically an irregular circle. But comets are very strange. The shape of this celestial body changes dramatically when it approaches the sun. There will be a long tail. It's like a big broom. So, we ordinary people call this kind of star a broom star.
But astronomers are unwilling to name such asteroids with such ugly names, and instead use a better name. Astronomers call the broom star a comet.
Where does the comet come from? This is a fascinating question as well as a confusing question. When studying the source of comets, astronomers often need to perform statistical analysis on the orbits of comets to see what their orbits look like before they are perturbed by the gravitational force of large planets, and to find the laws from them. In 1950, the Dutch astronomer Oort calculated the original orbits of 41 long-period comets and believed that there was a huge "ice storehouse", or a huge "cloud cluster" outside the orbit of Pluto. This cloud cluster extends to about 2.2 billion kilometers away from the sun.
All comets in the solar system come from this cloud cluster, so people call it comet cloud or Oort cloud. Nowadays, the distance of the Oort Cloud is generally set at about 150,000 astronomical units, which is roughly 4000 times the distance of Pluto. It takes more than two years for the fastest light to come to our solar system from there. Therefore, it takes a long time for the comets to circle the sun. Only when they run hundreds of millions of kilometers away from the sun can they be caught by people. see. They spend most of their time in orbit away from the sun.
Take Comet Ikegu-Kwan as an example. It has a speed of 500 kilometers per second near the perihelion. It only took two hours to finish the half way closer to the sun, but it took more than 1,000 years to finish the far side. The cycle of Comet Ikeya-Seki is not too long. Some long-period comets can travel through millions of years in a week. Therefore, although astronomers estimate that there may be 100 billion comets in the Oort cloud, there are only five or six comets discovered every year in the world.
Because the comet cloud is very far away from the sun, the large and round sun cannot be seen in the position of the comet cloud. The sun has truly become a veritable "ordinary star", and its brightness is darker than that of Sirius on Earth. But the comet cloud is unimaginable far away from other stars. The comet cloud does not get the light and heat of any star, so it is like an "iceberg". The comet comes from this iceberg. The visitors on these icebergs are themselves large and small icebergs with a diameter of more than 10 kilometers, which is more spectacular than the highest peak on the earth, Mount Everest, and the smallest is only a few tens of meters. These icebergs are made up of a large amount of ice material and dust. In addition to most of the ice material is water ice, there are carbon monoxide ice, carbon dioxide ice (dry ice), ammonia ice and methane ice.
Because there is a large amount of dust in the ice material, the iceberg looks gray-black, unlike the Antarctic icebergs we see on TV. The American astronomer Whipple gave them a vivid name, "Dirty Snowball." Due to the disturbance of primordial comets by stars passing by the sun, comets with small masses leave the comet cloud, turn their heads, or run out of the solar system, or fly toward the interior of the solar system. Most comets follow a hyperbolic or parabolic orbit when they head toward the sun. After thousands of years of travel, they are captured by telescopes as they get closer and closer to the sun.
When some comets meet with large planets, their orbits are perturbed, turning into elliptical orbits, changing from non-periodic comets to new periodic comets, and begin to "settle down" in the solar system. In 1958, some American astronomers believed that there was another comet warehouse in the solar system, the so-called "Kuiper Comet Belt." This ring-shaped comet belt is not far from the orbit of Neptune, and it is estimated that there are at least several thousand comets in the belt. All short-period comets come from this comet library. Compared with the Oort Cloud, this comet belt is much closer to the earth.
After the Kuiper belt was proposed, some astronomers used large telescopes to observe this area in sections, but found nothing. There are three possibilities. The first is that there are not as many comets in the Kuiper belt as expected, the second is that the Kuiper belt may be located farther away, and the third is that there is no Kuiper belt at all. The Kuiper Belt is also something people imagine. But no matter what, this kind of thing will only be known after an on-site inspection.
Astronomers on Earth have discovered some mysterious celestial bodies in the outer solar system. Astronomers call them celestial bodies because they are not yet certain whether they are planets, asteroids, or comets, but in any case, this is also a remarkable and important discovery in astronomy.
Astronomers have not fully understood the movement and internal structure of comets. Therefore, whether it is the Oort Cloud or the Kuiper Belt, both are hypotheses about the origin of comets, and have not been finally confirmed. The consensus view among astronomers is that the period when a comet was formed from the original solar nebula is basically the same as the period when the sun and planets were formed. Comets are a natural by-product of the creation of the solar system.
Regarding the origin of comets, it can be said that there are divergent opinions, and there is still no consensus on the issue. There is an opinion that volcanic eruptions on celestial bodies in the solar system throw a large amount of material into space, and comets are formed by these materials. This type of view can be called "eruption theory." Another view called the "collision theory" believes that in a very distant age, two celestial bodies in the solar system collided with each other, resulting in a large amount of fragments of material that formed a comet in the solar system. These hypotheses have some difficult to explain problems, and it is difficult to get the recognition of most astronomers.
In any case, the mysterious comet always carries some special imaginations of mankind. The reason why we call it a comet is because it is very likely to be a stranger who sows the seeds of life on the earth.
Life on our planet may not have been conceived by the planet itself. It is very likely that it is a kind of life seed from outside the sky, after it fell on the earth, it took root here, sprouted and bloomed. From then on, life on our earth began to become rich and colorful.
Although the solar system is only an ordinary-looking star system in our Milky Way. But for us humans, that is too important. We human astronomers. The most studied celestial bodies are those in our solar system.
Although relative to the outer star system, the celestial bodies in our solar system are already very close to our earth. But even so, it takes a long time for us humans to roam the solar system. After all, the solar system is really too big compared to the earth-moon system. If there is no fast enough spacecraft, it is difficult to travel in the solar system.
Fortunately, we now have an antimatter spacecraft, and we can now travel in the solar system. Zhao Zhongyao watched Feifei Tiantian and Qu Yuqian said some of his views on the solar system.
After Feifei Tiantian and Qu Yuqian heard what Zhao Zhongyao said, they became full of curiosity about the mysterious celestial body like comet.
Dad, let's hurry up and travel in the solar system! I really want to see with my own eyes what a comet looks like. Feifei looked at Zhao Zhongyao and said.
‘Dad, I also want to see what a comet is like, let’s travel to the solar system as soon as possible! Said the same every day.
‘Zhongyao, let’s hurry up and travel to the solar system! I also want to see what the solar system looks like. Qu Yuqian said so too.
‘Okay, then I’ll go back to the company tomorrow, first launch a probe and find the way first. Said Zhao Zhongyao.
That is, Zhao Zhongyao and the others designed a very advanced antimatter spacecraft. It made their journey to the solar system possible.