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Text Chapter 11 Flying to the sun!

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    Yunyang's reason for doing this is simple.  Yunyang made this decision after making precise calculations, fully grasping the orbits of Venus and the Earth, and comprehensively considering the gravitational acceleration effect of the sun.  Based on the current position of the earth in the solar system, if Zhang Yue returns according to the method he used, he will need to constantly correct his position in space, and each correction of the position requires fuel. In the end, it will take more than six months.  moon.  According to the shortest route planned by Yunyang before, calculating the position of the earth in advance can save the next month, but five months is still unacceptable to Yunyang.  Because Taiyu Golden Pagoda only has four months left to use.  This forced Yunyang to find another way out.  After careful thinking, Yunyang planned the most reasonable route in this dynamic solar system model.  This route is to first leave Venus, fly to the sun, and use the gravity of the sun to accelerate the Taiyu Golden Tower. In this way, the Taiyu Golden Tower can obtain a higher speed bonus without consuming its own energy.  Moreover, on the way close to the sun, Zhang Yue can also create more Jiuxuan spirit stones because of the abundant spiritual power of the sun.  With more Jiuxuan Lingshi, the Taiyu Golden Tower can be accelerated again. Finally, through precise orbit calculation, the Taiyu Golden Tower can accurately merge with the earth at a point after passing the sun.  At that time, as long as it slows down again, the Taiyu Golden Tower can land on the earth.  The total distance of such a navigation route will exceed 230 million kilometers, which is far more than the straight-line distance between Venus and the Earth at this moment, which is 90 million kilometers. It is also one month longer than the shortest route planned by Yunyang.  More than twice that.  However, if we take such a route, the Taiyu Golden Tower's forward speed will reach an astonishing 35 kilometers per second. In total, the 230 million kilometers of voyage will only take about two and a half months.  You can finish the walk.  Counting the time spent on acceleration and deceleration on the road, Yunyang is confident that the total flight time will be within one hundred days.  To sum up, there are two main reasons why this route is feasible. One is the gravitational acceleration effect of the sun, and the other is that the closer to the sun, the faster Zhang Yue can create Jiuxuan Lingshi.  But it is easy to say, but not so easy to do.  This involves an extremely complex calculation process. Fortunately, Yunyang was able to calculate all of this clearly after somehow possessing such powerful computing power after traveling through time. Otherwise, even if he knew these two points, he would not know this route.  There is a way to go.  Knowing the precise data about Venus, the Earth, and the Sun is only the basis for starting calculations.  Even during the navigation process, the gravitational disturbances of other major stars must also be calculated.  Because in interstellar navigation, a slight difference can make a difference a thousand miles.  In Yunyang¡¯s calculations, the next day is a good ¡°window period¡± to break away from the gravitational field of Venus and enter the sun-grazing orbit.  The so-called window period refers to the time within which a spacecraft can be launched to obtain the best orbit.  Yunyang thought that the Taiyu Golden Tower at this moment could probably be regarded as a spacecraft.  Launching within the window period can achieve maximum results at minimum cost.  In order to meet the window period, Yunyang still needs to make a lot of preparations in advance.  This task was left to Qin Wu and Song He.  During this day, according to Yunyang's instructions, the two of them controlled the Taiyu Golden Tower, sometimes slowing down and sometimes accelerating, sometimes adjusting the orbital height, and usually making very precise fine-tunings, which almost made them unbearable.  Lived.  It is crucial to choose at which point to break away from the gravitational field of Venus, what speed to maintain when breaking away, what kind of orbit to choose, and what angle of inclination to keep.  Because this will determine whether the orbit of more than 100 million kilometers from the Taiyu Golden Pagoda to the sun is accurate and meets the requirements.  As long as there is a slight mistake, Yunyang will have to spend a lot of fuel to adjust the orbit of the Taiyu Golden Tower in the later stage.  And this, for the Taiyu Golden Pagoda, which is already on the verge of destruction, is likely to mean catastrophe.  This day is a stressful day.  Yunyang directed Qin Wu and Songhe to fine-tune the orbit, while Zhang Yue continued to create the Nine Mysterious Spiritual Stones.  One hour before reaching the window period, all orbit fine-tuning work in Yunyang was completed.  After taking a look at the precise timer on the Taiyu Golden Tower, Yunyang ordered: "From now on, you can rest for an hour. After one hour, according to my order, you must activate the Taiyu Golden Tower as soon as possible.  Accelerate the Taiyu Golden Tower by two kilometers per second within minutes This may be a bit difficult, but you must complete it." Qin Wu and Song He nodded silently.  "Senior brother, you should also take a rest. The Nine Mysterious Spiritual Stones needed at this moment are already available."It's enough time, no need to work so hard.  " "I have nothing to do.  "Zhang Yue just shook his head silently, without stopping his work at all. "Huh" Yun Yang did not try to dissuade Zhang Yue anymore, but also sat down and took a rest.  It drained Yunyang's energy all at once. After the extremely concise sentence "Fly to the sun first, then fly to the earth", there was a daunting amount of precise calculations that Yunyang had to take into account.  The movement of the Earth and even the delay of the speed of light must be taken into account. Because of the limited speed of light, the Earth seen from Venus is actually the Earth from interstellar navigation about three minutes ago. The difference is thousands of miles.  , if the error of three minutes is not considered, the Taiyu Golden Tower will pass by several million kilometers away from the earth and never return to the earth. This is different from the process of entering the orbit of Venus.  There is a range between it and the escape speed, that is, it does not have to be very accurate, but interstellar navigation must be very accurate without any error. It is precisely because the amount of calculation is too huge that Yunyang could not bear it before.  And temporarily fainted. All the factors that determine whether the Taiyu Golden Tower can accurately sail to the earth are turned into specific data in Yunyang's mind, letting Yunyang know how the Taiyu Golden Tower should behave.  What speed, what kind of inclined orbit, and what time to leave Venus and step into space. Yunyang has done a lot of preliminary work, and even prepared for a full day, but the moment to break away from Venus's gravitational field.  When it finally arrived, it seemed a bit unremarkable. Venus was still moving slowly. The thick clouds on Venus were still reflecting the light of the sun. There were still huge lightnings and unimaginable winds surging in them.  Move. The Taiyu Golden Tower, which carries all the hopes of Yunyang, is like an ant lying on the mountain. No matter whether the ant leaves or stays, whether it lives or dies, it will not have any impact on Venus.  The light emitted from the golden tower was only slightly brighter than usual, and it only lasted for one minute. From the performance point of view, this was a very ordinary minute.  But this is also a very thrilling minute, because it will determine at least 30% of the winning rate of the entire trip. In Yunyang¡¯s view, this process is perfect. Of course, there are no flowers or cheers to greet Yunyang.  It is really difficult to explain the significance of this minute to Zhang Yue. The speed of Taiyu Golden Tower has accelerated to 11 kilometers per second, exceeding the escape speed of Venus. After this moment, Taiyu Golden Tower.  The tower will no longer orbit Venus, but will break away, step into the vast space, and set off towards the sun. Only this one minute of operation made Songhe sweat.  He put his shoulder and said: "Take a rest, there is nothing left.  Well, maybe you can go say goodbye to Chang Gengxing.  " Songhe waved his hand and did not look at Venus. Instead, he sat down somewhere and breathed heavily. Qin Wu walked to the transparent wall and stared at Venus getting further and further away from him. "  If you look at it from here, Chang Geng Star is really beautiful" Qin Wu sighed. "Yes, it's very beautiful, but also very dangerous. We almost died there" Yunyang sighed and said, "I remembered an idiom.  , beauty is a disaster, used to describe that the more beautiful something is, the greater the danger.  "    "cut.  "Qin Wu curled his lips at Yunyang and expressed his disdain. "Perhaps after realizing that Yunyang has changed a lot and has become more peaceful and even funnier, even Qin Wu, who has always been silent towards Yunyang, has some emotions.  At a speed of eleven kilometers per second, Venus is changing rapidly, gradually changing from a big ball with no obvious arc to one where arcs can be seen.  Soon after, the boundary of Venus was clearly seen, and a huge sphere appeared in front of everyone. After seeing the whole picture of Venus, Venus began to shrink, and gradually, the clouds of Venus seemed to merge with Venus.  As a whole, it was no longer possible to distinguish the detailed features of Venus. Yunyang checked the time. At this moment, eighteen hours had passed, and the distance between Taiyu Golden Tower and Venus was almost 800,000 kilometers.  Next, we will continue to accelerate, and finally it will take about two months to reach perihelion Then we will pass by about 50 million kilometers from the sun, change our orbit, and fly towards the earth, our hometown.  " "Qin Wu, get ready. We will start in ten minutes."??The first time to actively accelerate.  ¡± ¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª Regarding the timing method in the article, let me explain to you here. Although the background in the article is similar to ancient times, if you use hours, quarters of an hour, a stick of incense, etc.  If you want to describe time, you need to add a conversion process, which is troublesome to write and seems to take a lot of brains. Therefore, to make it simpler and save trouble, Rainbow just writes the time in seconds, minutes, hours and so on.  The same is true for the unit of length. Rainbow directly uses the two units of kilometers and meters. It is good for everyone to know. In fact, this does not affect reading. Of course, this may cause some trouble for those who are strict in textual research and obsessive-compulsive disorder.  I can only apologize. Also, keep asking for recommendation votes!
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