Seeing Zhuge Liang ask for advice on his job, Li Su was also amused and laughed: He really can’t do anything about astrology, calendar, astronomy, nonsense! Are you omnipotent when you are your teacher?

He originally appointed Zhuge Liang as the General Administration of Publicity and Publication, and everything else was a big deal. But since he had done it, he had to do it well even if it was a transitional work.

Moreover, Li Su wrote "Theory of Refuting Disasters". Now Zhuge Liang asked him about the content of his work that was added to him. To outsiders, he seemed to be professional and appropriate.

Li Su could only feel guilty (not humble! It was guilty!) and asked Zhuge Liang to talk first. If it was too difficult, he would make an excuse to leave: "Tell me, what trouble is there in official business."

Alas, just treat it as helping Zhuge Liang further break his superstition and preventing him from making mistakes in the wrong astronomy and geographical direction in the future. These things are ultimately the path of his student days, and it is useless to govern the country and pacify the world in the future.

Zhuge Liang saw the permission, but he didn't be polite to Li Su. He jumped onto Li Su's carriage, and then let his carriage follow behind and followed Li Su to Chen Cang together.

After getting on the bus, Zhuge Liang said: "That's right. I have recently encountered some new disasters and misunderstandings to record and judge. The original Taishi Cheng and Lingtai Cheng were very familiar with the matter, and according to the old system, I saw that they wrote "Some Disasters and Mistakes" and the person who was wrong in a certain field, so I was so angry that I was so angry.

Mr. Li has been writing about "The Refuting of Disasters and Disasters" and "The Refuting of Blessings in the Palace" for so many years. Why don't these officials who work in astrological calendar technology know to keep pace with the times? I reasoned with them and refuted them one by one, but they were speechless. Then they spread their hands and asked me: Then, if you don't follow the warning of disasters and strangeness, you are not allowed to write about the response of heaven and man. So what should these strange phenomena be explained?

But I couldn't give a new explanation, so I wanted to ask Master Li for advice. Anyway, you're bored to go on the road, so I'll teach me on the way. I've written several short articles for ten days after taking office, such as "Theory of the Untreatment of Locusts" and "Theory of the Defeat of Earthquakes", which criticized all the main loss of the Locusts and the Defeat of Earthquakes and the Defeat of Earthquakes and the Defeat of Earthquakes and Earthquakes this year, but I have never seen this new disaster."

Li Su was also quite pleased when he heard this. Unexpectedly, Zhuge Liang understood everything he did. In less than half a month after taking office, he had already written some articles about common governance and explanations of disasters. It does have long-term benefits for enlightenment of people's wisdom. Although the content of these short articles must have been summarized from Li Su's governance experience this year, it was not created by Zhuge Liang.

Originally, the disaster-stricken officials below the Grand Historian of the Han Dynasty only advised the emperor to "If it rains too much, you should pray and blame yourself. If it rains too much, you should pray and blame yourself." What is the use of superstitious officials to support them?

It’s better than Zhuge Liang’s job just a few days ago, and he broke the old and established the new.

Li Su signaled Zhuge Liang to continue talking.

Zhuge Liang sincerely described: "The new disasters encountered this time are very dangerous according to the old method. They are called "Yinghuo Shouxin". They are the astrological signs that happened a few days ago. The emperor is extremely unlucky, even more than locusts, droughts and earthquakes. Moreover, I checked the ancient calendar. The Taishigong also wrote in "Records of the Grand Historian. Book of Heavenly Officials" that Yinghuo was a tyrant, traitor, sick, mortified, hungry, and soldiers. He lived in the opposite two houses and lived in the third month. He received soldiers in May, died in the middle of July, and died in the middle of September.

Now it is September. Looking at the astronomy at night, we can see that Ying Huo lives in Xinsu and returns to Taoism. It is extremely dangerous, comparable to the time before the death of Emperor Shi Huang. "Records of the Grand Historian. The Records of Qin Shi Huang" clearly states: In the thirty-sixth year of Emperor Shi Huang, Ying Huo guards his heart. There is a falling star to Dongjun. The stone is said, "The Emperor Shi Huang dies and the earth is divided." The Emperor was angry and sent the censor to ask, "Don't accept it, and all the stones are taken by the people living beside him and killed him."

(Note: Sima Qian also realized that the zodiac signs can only be seen for half a year, such as Xinsu, Scorpio is from the third to September of the lunar calendar. In the other half of the year, it faces the sun on the zodiac side, so it is blocked by the sun during the day)

After listening quietly, Li Su was a little worried at first because he really couldn't understand the astrological calendar, and Li Su didn't even know what the ancients said about "what astrological sign is bad, what is good."

But after hearing Zhuge Liang say that, he secretly breathed a sigh of relief.

It turned out that it was Ying Huo Shuxin, which is also the most well-known of the evil stars. He later studied orthodox theory and related political philosophy courses in the Diplomacy Academy and discussed the issue of legitimacy of dominance.

And this thing can be explained in junior high school physics.

The so-called "Yinghuo guards the heart" is translated in human terms. In fact, it is "when observing Mars from the earth passing through the main star of Scorpio, Xinsu II, because it is on the orbit of the great opposition of Mars, that is, the far point of Mars' elliptical orbit around the sun, from the earth, Mars has not moved for many days and is always next to Xinsu II."

As we all know, after studying physics at junior high school, you will understand that Mars is one circle further away from the sun than the earth, so the Earth is 365 days a year, and Mars is about 687 Earth days a year. Therefore, every 687 days on Earth should be seen twice on Earth, Mars is located at a far point in the elliptical orbit, with a slower angular velocity or even relatively motionless.

However, in fact, because one of them was on the sun, that is, the side of the sun on the earth during the day, it was invisible. All that could be seen was the time when Mars orbited on the back of the sun. Therefore, the phenomenon that the ancients thought was strange, which was seen less than two years on Earth.

The reason why the ancients even named Mars "Yinghuo" was because Mars, a trajectory that seems to be "moving most of the time, occasionally staying still for many days in a short period of time, or even occasionally retrograde". The ancients felt very confused and called it "Yinghuo".

According to the frequency of occurrence every two years, there is nothing to make a fuss about, but the ancient Chinese divided the sky into twenty-eight constellations, including eight constellations on the ecliptic surface, corresponding to the twelve constellations of the West.

Therefore, a zodiac sign in the west corresponds to 30 degrees of the zodiac surface, and a zodiac sign in the east corresponds to 45 degrees. "Xin Su" strictly includes the entire Scorpio, plus Libra, Sagittarius and Scorpio, each 7-degree angle celestial area adjacent to each other.

If you understand these logics, it’s better to forget the probability of “Yinghuo Shuxin” appearing.

Mars has been approaching once every two years. Every time it appears in a certain celestial area of ​​the ecliptic surface, it changes regularly. From a very long period of time, the probability of the eight constellations is the same.

So dividing by eight means that every 15 or 16 years, you can see that the Mars rush is in the Xinsu Tian District. This is a common phenomenon that will inevitably occur. How can you connect with the evil spirit?

Of course, the actual algorithm should be more strict, because the ancients did not necessarily regard "Martian stagnation and retrograde in the 45-degree sky zone of Xinsu". Sometimes they should emphasize that it must occur very close to the super red giant star Xinsu II. In this way, they can have a certain "discretion" and see how the people in power judge it.

The reason why Chinese history says this is very bad is that Li Su also read and analyzed it when he was studying in his previous life, thinking that it is mainly because the time in the 36th year of the First Emperor was so famous.

The four words "Yinghuo Shuxin" were written by Sima Qian after the year preface, and the super famous historical event was written immediately afterwards: a meteorite from the sky, which read "The First Emperor died and the earth was divided." The next year, the First Emperor died, and the world was in chaos!

If you are linked to major events such as the death of the First Emperor and the demise of the Qin Dynasty, how can you not be evil? That is the death of the emperor of the ages and the demise of the first unified dynasty of the ages!

Later dynasties changed dynasties and emperors wrote history for the previous dynasties and began to pour dirty water on the previous dynasty. Later astronomers retorted according to the trajectory and physical algorithms, believing that the 2,000-year imperial history should have at least 38 times, but the "Twenty-Four Histories" recorded only 22 times. In other words, many times, the Yinghu Shouxin that occurred in peacetime was concealed by the Taishi Ling/The Imperial Heavenly Supervision officials.

(Note: If you appear in the Xinsu Star Zone once in 16 years, there should be more than 120 times in 2000, and if you strictly require Scorpio, there should be more than 80 times. Therefore, these 38 times should be based on the strict standard of the "15 degrees where Xinsu II is located".)

Anyway, the emperor does not know how to read the sky, and it is easy for the technicians to conceal and not report it, and do not want to cause trouble. Unless there are experts and enthusiasts in the folk who observe it, they will warn the emperor to issue a self-criticism, so that the matter will be made big, impeached the Grand Historian Lingguan without reporting it - to put it bluntly, it depends on whether there are any experts in the opposition party who understands astronomy and uses this to make trouble.

If it were just concealment, this disaster would not have been hyped so dangerously by all dynasties. What is even more disgusting is that when people from later generations wrote history to the previous dynasty, they deliberately made up the "Yinghuo Shuxin" that they had never appeared.

In this way, if you want it to have it, you don’t have it, and if you want it to have it, it’s like a public toilet, you can go to it and dress up.

The reason why Li Su knew was that in the orthodox textbooks he read in later generations, he specifically analyzed a case - according to astronomers' deduction, in the late Western Han Dynasty, in the last two years of Emperor Cheng's death, it was actually impossible for Mars to conquer the celestial region of Scorpio, which was completely inconsistent with physical calculations.

However, after Wang Mang usurped the Han Dynasty, and Liu Xiu recognized Emperor Yuan of Han as the "Emperor's Cao" in the early years of the Eastern Han Dynasty, saying that "Emperor Cheng will not be able to be regained." Therefore, Xinmang and the Eastern Han Dynasty Taishi Ling joined forces with Emperor Cheng of Heihan to fabricate the "Yinghuo Shouxin" before Emperor Cheng's sudden death. Then he linked this matter with the incident of killing the three dukes in the late years of Emperor Cheng's death. Finally, Ban Gu accepted the letter and wrote it into the "Book of Han".

According to this forged record, in the year when Emperor Cheng of Han died, Ying Huo Shuanxin occurred. Then Emperor Cheng of Han transferred the three dukes to the Prime Minister Zhai Fangjin committed suicide (Zhai Fangjin was sentenced to death in 7 BC, which is a historical fact, and it is also due to natural disasters and strange phenomena, so there is no problem, but physicists estimate that it is not Ying Huo Shuanxin but other celestial phenomena. In order to augment the historical warning effect, later generations changed it to Ying Huo Shuanxin)

However, after the Prime Minister committed suicide and took charge of the crime, Ying Huo Shouxin was still "unsolved for months". In less than two months, Emperor Cheng of Han also passed away. The Book of Han fully described the danger of Ying Huo Shouxin this time, leaving an impression:

Look, when Qin Shihuang died, Qin Shihuang was in a state of chaos, there was a Ying Huo guarding his heart when the beginning of the rebellion. Before the Western Han Dynasty, there was also a Ying Huo guarding his heart once. The emperor behind gradually lost his virtue and became a puppet of Wang Mang. How powerful is this?

As a result, the 22 times recorded in historical books in later generations have become very high. Small things like dying an emperor are not worthy of Ying Huo Shuo. They must be ranked alongside the ultimate evil of "the emperor will change the dynasty after he dies" like Qin and the Western Han Dynasty, so that they are qualified to be recorded by the Twenty-Four Historians.

Of course, there are exceptions of "changing disasters into joy". Not to mention the distant ones, just say that Zhuge Liang observed the two cycles of Yinghuoguanxin today, that is, 32 years later, in 226 AD, Yinghuoguanxin also occurred.

In history, the disaster made the senior officials of Wei very frightened. In the end, Huang Quan, who had surrendered from Liu Bei to Cao Wei at that time, came forward to help explain and appease the hearts of the people of Wei. It turned out that Cao Pi died the following year after the outbreak of Ying Huo Shouxin. Huang Quan immediately said that this means that as the following is called emperors and Wei is the righteous.

Because Ying Huo Shouxin did not kill Liu Chan or Sun Quan, but let Cao Pi die. This is a happy event, not a bad thing. It proves that Cao Pi is the true emperor and is qualified to die because of Ying Huo Shouxin. Liu Chan and Sun Quan are not worthy of this qualification.

...

Li Su roughly knew that this was the principle. He didn't have much to say about the parts about history, but the parts related to physics can still be said.

Moreover, Li Su also knew that describing nonsense was not the key, but the key was how Zhuge Liang continued to contribute to his "Theory of Disasters and Disasters" and destroyed the superstition of disasters and disorders in the astronomy field.

In theory, the easiest and most effective method is to let Zhuge Liang use mathematical and physical methods to calculate the period formula of the Yinghuoxin calculation, and then predict or reverse the calculation, find the recorded year of the Yinghuoxin that has happened in history, and substitute it into the formula he made to calculate it.

If it is proved that the appearance of natural disasters and strange phenomena is mathematical law, then wouldn’t it be the most thorough way to dig out the root of the theory of celestial phenomena and disasters? I can predict that a certain celestial phenomena will appear in a certain year. If you say that this matter is caused by a loss of virtue or virtue, then it would be nonsense? The emperor has not done anything to lose virtue in a certain year in the next year. How can God know that the emperor has lost virtue?

If you do well, Zhuge Liang will not be in vain to learn from Li Su for many years. Zhuge Liang will give Dong Zhongshu a final and fatal blow to Dong Zhongshu's superstition of heaven and man!

It is also good to give Zhuge Liang another historical title in the future: Dong Zhongshu's last shovel gravedigger.

But, how to teach Zhuge Liang?

Li Su thought about his teachings on Zhuge Liang's mathematics and physics. He had never broken through the three Newtonian laws. He has not even taught "gravity" and the theory of celestial body movement. After all, these things are useless for engineering research and development. In his early years, Li Su did not want to waste Zhuge Liang's energy on studying gravity.

On the other hand, these are indeed shocking. Although Zhang Heng of the Eastern Han Dynasty had issued the "Huntian Theory" and believed that the earth was floating on the celestial ball of Hunyuan Yiqi, Zhang Heng still did not say that the earth was also a ball.

Even if you move forward to the earth and it is a ball, it is just a Ptolemy's theory of earth in the West. However, it is still the "geocentric theory" and not the "heliocentric theory". How can you teach Zhuge Liang to calculate?

Could it be that if we really want to tell him that the existence of gravity is that we are all "sucked" on the earth? How to prove it? The Cavendish twist scale experiment cannot be done now! The equipment accuracy is definitely not good.

Without experimental evidence, it can only be a straightforward statement, or it is Li Su's "hypothesis" and "conjecture".

From Chang'an to Chencang, the carriage will take four or five days. During these five days, Li Su thought about how to teach Zhuge Liang something he could accept so that he would not be shocking.

"A Liang... You may not believe or be correct when you say something to your master. Have you ever seen the sea?" After thinking about it, Li Su decided to first let Zhuge Liang accept that the earth is round, and then let him accept the concept of "gravity" in order to solve the problem of "why people don't fall."

Zhuge Liang: "I haven't been there before. I'm only seven years old when I left my hometown in Langya. Langya is not by the sea. I didn't have the chance to go to Donghai County when I was a child, nor did I go to Qingzhou."

Li Su: "..."

The ancients were so pitiful. Rich people like Zhuge Liang lived to be fifteen years old and had never seen him before. Who told him to follow Liu Bei all the way west at the age of nine?

Li Su patted his shoulder: "It's okay, in two years, you will find a chance to spend two dollars in winter to go to Jiaozhou to see the customs and customs. It's a journey of thousands of books to read. At that time, I'll personally go to the beach to verify the experiment I'm talking about today. Now listen to me first.

The experiment that I am talking about now was done by my teacher on the beach. That is, I stand a ten-meter-long mast on a boat. After the ship goes out to sea, the mast will be invisible after dozens of miles. We can do it today. This will make people go to the Qinling Mountains next to me to cut down a big tree several meters long, measuring the height and cutting it accurately.

This is the Wei River Plain, and the fields are flat. We can calculate that there is no ups and downs within 30 miles. Then, we will set the trunks forward and calculate the mileage. Look at how far away the tree trunks will not be visible. Write down the numbers and see if it is calculated by the teacher."

Zhuge Liang was very curious and wasted some time, directing everyone to cut down trees, cut them up after measurement, and then the convoy moved forward.

He spent more than half a day doing this experiment and set up several control groups. The wood also had two levels of length. Finally, he found that the same length of wood disappeared after walking the same distance. The longer wood disappeared was proportional to the longer time, which made Zhuge Liang feel curious.

Only then did Li Su come up with his far-fetched answer: "I have taught you the 'trigonometric function'. The principle of using the trigonometric function is that because the ground is a ball, the thickness of the ground plus the height of the wood is the oblique edge, and the thickness of the ground itself is the droop edge, then the distance our carriage passes is the opposite edge. I calculated that the thickness of the ground is more than 12,000 miles, and as for the center of the earth. If the earth is set as a ball with more than 12,000 miles to the heart, these data will be matched."

Zhuge Liang's legs were so scared that he couldn't help but stomp his feet, as if he was confirming whether the earth was strong enough, but after a few minutes, he recovered his calmness and calculated it himself.

Indeed, if you follow Master Li’s mathematical model, it would be correct to use it!

Thanks to Zhuge Liang's three or four years of experience in mathematics, he has formed the thinking habit of "what calculated is right, even if I am like this in reality, no matter how incredible it seems, there is nothing to be afraid of." He swallowed his saliva and asked with difficulty:

"Then why don't we fall when we reach the back of the ground?"

Li Su spread his hands: "I don't know if I am a teacher, but I only know that if I want us not to fall, there must be a force that will hold us. Perhaps everything that is heavy enough can show the force of pulling small things. The weight of all things on the ground may be the measure of the earth pulling all things.

Moreover, if we accept this setting, Zhang Heng's "Huantian Theory" can be more complete. Zhang Heng originally believed that the earth floats in the celestial sphere. We just need to change this earth to "earth", inside and outside the earth, isn't it enough? I was curious to calculate it, but it turned out that it was not easy to calculate the heart of the earth as the heart of the celestial sphere. If the sun is the heart of the celestial sphere, the earth just circulates the sun and the celestial sphere in layers and moves in layers, it would be even better."

Li Su also knew that he would go step by step, so he took a piece of paper, drew six concentric circles, and drew the inner and outer order of the six planets - that is, the earth plus gold, wood, water, fire and earth. After all, only these ancient Chinese people also observed them. Uranus, Neptune, which is easy to find with the help of astronomical telescopes, does not need to use it to cause trouble for Zhuge Liang's science popularization, which is not conducive to solving the current problems, but rather complicates the problems.

Li Su spent three days teaching Zhuge Liang to understand that "Yinghuo or Mars is just a sun-circling star that just circles outside the earth. Retrograde and stagnation are just switching between the far corners of the elliptical orbits."

As for the 365-day year on Earth, there is no need to teach this. How long does other Mercury, Venus, Mars last year (a circle), Li Su didn't teach Zhuge Liang either, so he let Zhuge Liang substitute it into the formula.

Zhuge Liang's calculation questions are still fine.

The two of them went from Xiliu and Huaili to the west of Chang'an to Ji County. Zhuge Liang finally calculated the orbital cycle (the orbital trajectory curve is still not calculated, Li Su's mathematical tool is not enough, he just knows the cycle)

Zhuge Liang was a little obsessed with his hair. Within a few days, he grabbed dozens of hair. When the convoy left Mei County, he suddenly hugged his knees and whistled, and then laughed:

"It turns out that Ying Huo's stagnation is to retreat one and one third of the confinement area every 220 and half months. However, after retreating three times in a row, because the fourth time retreated to the sun, the next time is only 11 months. And after the last time the celestial ball retreated to the end, the insufficient part will be made up from the opposite direction! Look for it in the other direction!

In this way, every so long, Ying Huo always needs to guard it once? It is either guarding the heart, or guarding one of the other seven zodiac signs! This is completely calculated. What does it have to do with the loss of virtue of a man and the change of dynasty? Can God still know whether a man will lose his virtue in sixteen years?"

Li Su was ashamed when he heard this: he only provided hypothesis and mathematical tools, but he really didn't know the cycle and movement rules of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the stagnation of the

So he wanted to repay the answer but he couldn't repay it.

Unexpectedly, Zhuge Liang really calculated it based on the formulas and ideas he gave.
To be continued...