"When the moon is eclipsed, it will be normal." Huan Tan believes that this sentence in the Book of Songs a thousand years ago shows that a wise man pointed out that lunar eclipses are ordinary things. After entering the Han Dynasty, the territory was vast and the world was peaceful, and the observation of the sun, moon and stars was more detailed.

He remembered that Sima Qian summarized the rules of lunar eclipses in his "Shu Tianguan" and pointed out incisively that lunar eclipses are constant; solar eclipses are not good. The subtle meaning is that since lunar eclipses have rules to be found, they should be a "constant" phenomenon and cannot be regarded as an evil sign.

But Sima Qian was born into Mr. Huang after all, and this was regarded as "incorrect in terms of three views" after the Han Dynasty. His faint voice was drowned in the endless prophecies of the Confucians.

Since the Han Confucians such as Dong Zhongshu entered the classics with Yin and Yang and Five Elements, and the response of heaven and man was determined, and the metaphysics became more and more intense, no one took Sima Qian's conclusion of painstaking attainments seriously. Every lunar eclipse, Gongyang Family, Ouyang Shangshu, Yi, Qi Shi, various schools have put forward their opinions, forcibly involved in the court's political morality, taking the opportunity to attack political enemies, and even forcing the emperor to abolish the queen and issue a self-criticism edict...

As an astronomy enthusiast and a firm supporter of the "Huantian Theory", Huan Tan had long suspected lunar eclipse. Unfortunately, there was no Mile Mile Mile at that time, and the observation was inconvenient. The documents of the previous dynasty were taken away by the academic clerk Liu Xin. It was so secretive that neither Huan Tan nor Yang Xiong could know the exact records of the past dynasties.

They also asked Liu Xin, but Liu Xin said with confidence: "Sima Qian's words are wrong, and the lunar eclipse is impermanent."

Although Liu Xin was involved in politics, no one dared to question his academic level, so Huan Tan believed it.

It was not until Xinmang fell and the documents of the previous dynasty fell into the hands of the fifth relationship. Even when "protecting" Liu Xin's family, they found the manuscripts and texts of the "Three General Calendar" compiled by the old guy, many of which were not made public. Huan Tan returned to the north and was ordered to sort out Liu Xin's works. Only then did he read a passage that made his orifices smoke!

"Press the lunar eclipse, set the accumulated months of the year after year, multiply it with twenty-three, and increase it by 135, and eliminate it. If it is not full, add twenty-three to get one month, and increase one hundred and thirty-five, and count the gains, and then the eclipse of the moon..."

Huan Tan was shocked: "It turns out that Liu Xin had calculated the lunar eclipse cycle based on records of previous dynasties when he was compiling the "Santong Calendar"!"

This is not an empirical summary and visual inspection, but a complete set of meticulous algorithms that infer that every 135 moons and lunar eclipse seasons, which is more than twice a year.

However, Liu Xin was only a small step away from revealing the facts, but he stopped and even hid the results. During the New Dynasty, he often interfered with the lunar eclipse and used the theory of yin and yang to criticize political enemies.

After Huan Tan was angry, he quickly understood Liu Xin's intention: "Wang Mang returned to the court, one of the links was to borrow a lunar eclipse during the reign of Emperor Ai of Han, so that Wang and Liu Xin could take the opportunity to speak out, attacking the foreign relatives, Queen Fu and Queen Ding's faction."

Although many years have passed, as long as Wang Mang is in power, once Liu Xin breaks the window paper, where will Old Wang Mang's face be put? In addition, Liu Xin also believes in yin and yang and is unwilling to admit that lunar eclipse is like the rising and setting sun, which is ordinary, so he can only deceive himself:

"There will be no problem with the induction of the heavenly beings. It must be that my calculations were wrong!"

The old guy pretended to be the same and let the calculation sink in the bamboo slips until it was turned out by Huan Tan.

When Di Wulun learned about this, he was quite moved and thought to himself: "Sure enough, when academics involve politics, don't think about freedom and correctness."

Having said that, the fifth relationship wants to break the fog on the body of the "disasters" such as solar and lunar eclipses, even earthquakes, floods, and droughts, which is actually for political purposes.

He likes that everything is under control, but according to the response of heaven and man, it always brings surprises. How can the country be so big, and how can it be good everywhere? Any disaster in the territory is caused by political morality, so how can it do things? Although the fifth relationship has been severely suppressed, scholars who firmly believe in these will still secretly form public opinion and point fingers at dissatisfaction. If it is unified, they will follow them to make trouble, but now Wu and Shu are still there, and the other party is taking advantage of the situation to cause turmoil and incite people's sentiment.

Therefore, we should choose the easiest lunar eclipse cycle to further attack theology of prophecies and divination, so that Liu Xiu and Gongsun Shu's move to jump to the great gods in times of disasters will look like a joke.

Two years ago, in March of the seventh year of Wude, Chang'an encountered a solar and lunar eclipse on the same day, which caused panic. The government did not use the rumors to refute the rumors, and it must be predicted in advance. The lunar eclipse cycle in Liu Xin's "Three General Calendar" is indeed wrong and cannot be completely accurate. Huan Tan must re-estimate it.

The difference is a slight mistake, and the fifth reunion then strongly supports Huan Tan's observation, allowing the workshop to burn more transparent glass, improve the Thousand Mile Mile Mile Mile, and increase its multiples little by little...

Huan Tan gradually approached the "truth" he wanted. In order to prove to the Tai Scholars that the moon's phases are not the volume shrinkage, Huan Tan conducted an observation.

That night, the night was clear and the stars were twinkling, and a crescent moon floated in the night sky. Huan Tan, with hundreds of scholars from the Taixue School, stood on the observatory platform of the Weiyang Palace, observing the fifth constellation of the Western White Tiger, a bright star "Bi Yuewu", to see how it was covered by the gradually moving Emeiyue.

When "Bi Yuewu" and the moon meet and there are still some gaps, "Bi Yuewu" quickly disappeared. This scene was observed by more than ten thousand-mile mirrors at the same time, and a painter recorded it. Huan Tan accurately measured the time when "Bi Suwu" was hidden, calculated the unwavering data, proving that those gaps were part of the moon's loss of food, and "Bi Yuewu" was hidden by the shadow of the moon itself.

The moon's phases have nothing to do with its size and volume. Since this is the case, a lunar eclipse should be a similar situation!

Finally, Huan Tan measured that 28 lunar eclipses would occur in about 19 years. When the result was submitted to the Fifth Reun’s desk, the Fifth Reun asked him if he was sure, because according to Huan Tan’s speculation, the next lunar eclipse would occur on the fifteenth lunar lunar lunar lunar lunar lunar 19th year of Wude. This time, the Fifth Reun did not intend to be as passive as two years ago. He wanted to announce the prediction results in advance!

"At that time, Liu Xiu, Gongsun Shu will be very nervous and terrified, beating the drum and shooting the sky to save the moon, but I only regard it as normal, as if the moon rises and the moon sets, and the moon is full and wanes."

The fifth relationship is solemn: "But once there is a mistake, the day of the lunar eclipse is not accurate, and I will be suspicious of the people and be laughed at by the world!"

"Junshan, can you guarantee that this calculation is correct?"

Facing the eyes of the fifth reunion, Huan Tan said with great pressure: "I have been watching the stars for more than 40 years and watching the moon for seven years with a thousand-mile mirror. I have calculated the lunar eclipse cycle for several years. I have repeatedly calculated it. At the right time, I dare not be accurate, but the sun on the lunar eclipse will never be wrong!"

Although he was quite confident at that time, on the day of the lunar eclipse, Huan Tan was still quite nervous. He took the students to look up at the night sky since dark, until his neck was sore that the moon did not erode.

Seeing that the nightfall was approaching, today was about to end, his prophecy was about to fail, and the lunar eclipse happened slowly. Huan Tan took a few steps back and leaned against the wall to remind himself not to fall down, and enjoy the cheers of everyone.

A large part of human fear of nature comes from the unknown. When people know that something is regular and predictable and will not have a huge impact on life, the fear of fear of the moon being swallowed by monsters will disappear a lot.

Instead, they will have a mentality: Sure enough, everything is under the control of His Majesty the Emperor!

After Huan Tan took a breath, he felt proud. Although it almost expired, his calculations and predictions were fulfilled. Everyone looked at him differently, and Huan Tan was also a little fluttering and came to the fifth reunion to express his merits to him.

"Your Majesty, since the lunar eclipse occurs as much as possible, it can prove that this is a common thing. Will the gold that Your Majesty promised to allocate to the Tianguan Office also be cashed out?"

The fifth reunion laughed: "This is nature."

The emperor ordered the young mansion to quickly allocate funds to the Tianguan, but then called Huan Tan to approach him, and smiled maliciously: "Are Junshan too happy?"

Huan Tan was stunned: "What does your majesty mean?"

Wu Lun smiled and said, "You can now know that lunar eclipse is a common thing. If it is placed in the Huntian theory, how can you explain it?"

Huan Tan was stunned for a moment, right!

According to the theory of Huntian, he cannot explain the lunar eclipse at all, but now he has accurately calculated the cycle of the lunar eclipse.

The fifth reunion's words were very light, and he only said to Huan Tan alone, but it was like a moon that crashed into Huan Junshan's heart, turning his astronomical theory over the past fifty years upside down!

"Since the lunar eclipse cycle is correct, then..."

"Can it be Huntian's saying it was wrong?"

...

A few years ago, Huan Tan was still angrily mocking Liu Xin for his past and in order to force the yin and yang prophecies and divination, he ignored the fact that the lunar eclipse cycle was also circumvented.

But now, it's his turn to make this difficult choice.

"Why could Huntian be wrong?"

For him, Huntian said, it was faith! Huan Tan, for the sake of glorifying Huntian, fought with the officials and old scholars of the Han Dynasty, the New Dynasty for decades, and even relied on his own rebuttal to convince Yang Xiong, who originally believed in Gai Tian's theory, and pulled him into his own camp.

However, even Huan Tan had to admit that when he got the Qianli Mile Mile, extended his gaze to a further distance, and gained a further understanding of the sun, moon and starry sky, the once meticulous Huntian theory seemed to have a crack.

For example, he once observed that the distant Mars in the Mile Mile mirror was like a small moon.

But Huan Tan was not so easy to convince. He quickly added a "patch" to Huntian.

After leaving the observatory and returning to the hall, Huan Tan started to chat with the fifth reunion, insisting on proving that his theory is correct.

"What I said about Huntian is a step further than the Gaitian theory. Gaitian thinks that heaven is a hemisphere, while Huntian thinks it is a round ball. The earth is like a yellow in a chicken, living alone in the sky, and the sun, moon and stars are attached to the 'celestial sphere', and the circumference is 365 degrees and 1 quarter of the circumference."

The fifth reunion nodded, to put it bluntly, this is still a kind of "geocentric theory".

Huan Tan said again: "But even if Huntian says, I don't think that 'Zhoutian' is the boundary of the universe, and there are other things outside the celestial sphere. Now I want to explain the lunar eclipse, can it be said that 'Zhoutian' is not a plane, but is similar in layers, or there may be as many as nine heavens."

"Qu Yuan's "Tianwen" says, "Where is the place and the place is there at the time of the nine heavens? There are many corners, but who knows the number? What are the sky? Where are the twelve? Where are the sun and the moon? How about the stars? "

"Therefore, I think that rainbows, clouds and mists are just the first level of heaven. According to the moon's cycle, or the second and third level of heaven, it is closer to the earth; while the sun is in the fourth and fifth level of heaven, which is far away from the earth? When the earth, moon and sun are running, there may be mutual obstruction, and a lunar eclipse will appear!"

What a good guy! The fifth Lun discovered that Huan Tan was really a person who could learn from one example. These nine heavens could indeed be used to illustrate the distance between the earth and the sun, moon and stars. It is worth it to do all his thoughts. From time to time, he would throw out the knowledge of later generations to guide him. But soon Huan Tan fell into his own logical loophole again, and his eyebrows frown. Even so, it would be difficult to perfectly explain the occurrence of the lunar eclipse.

He was actually a little bit away from the truth. The fifth reunification decided to go further and show Huan Tan a clear way.

"I recently obtained an ancient book called "Zhoufeng Jing"."

Huan Tan's brows became even tighter, and he immediately replied: "Your Majesty, this was written by the alchemist in the Han Dynasty and was not the suicide note of Duke Zhou."

Huan Tan's reaction was so great because this book was written by Gai Tianshu. In addition to the arithmetic part, Gai Tianshu was everywhere.

"I know it's a fake." The fifth reunion said: "But the stones in other mountains can be used to polish jade. There is a passage in it that I find quite interesting when I read it. Please listen to it."

Of course, the fifth reunion was not recited. He asked the Langguan Dou Gu to take the bamboo slips and make him recite: "The sun is the essence of yang, like the light of fire. The moon is the essence of yin, like the light of water. The moon contains scenery, so the moon is born from the sun, and the soul is born from the sun, and the light is full on the sun, and the sun is clear and clear. The moon is accompanied by the sun and becomes a sign of shape. Therefore, it is said that the sun is the moon, and the moon is the moon, so the moon is coming out, so it becomes a bright moon."

Wu Lun looked at Huan Tan and showed him the "correct answer" quite bluntly.

"The meaning of this sentence is that the moon originally had no light, but it was brighter with the help of the sun!"
Chapter completed!