Zhuge Xian was not clear, and this explanation would be in vain. In fact, his purpose was not to explain to Yu Wenjun and Yunfeng's wives and concubines. Such knowledge as astronomy and mathematics could not be grasped without more than ten years of study.

Which is a pass

Can you understand it with just words? But because he wanted to show off in front of his old rival Qiao Xiu, he smiled slightly and said, "After I demonstrate it, the Yu family girl may understand a thing or two." He said, "Bah bang bang!

"Hit your palm three times in a row.

A moment later, the sound of a waterwheel turning was heard outside the house, and a stream of clear water poured into the canal, pushing the Universal Elephant into motion. Suddenly, the Heaven and Earth stopped, and the inlaid sun, moon, and stars seemed to come alive and circle around the earth.

They have different but regular movements.

Especially for the two stars, the sun and the moon, the sun rises in the east and sets in the west. As soon as it sets behind the earth, it is the moon's turn to continue the sun's rotation and repeat its previous movement. Although the trajectories of other metal, wood, water, fire, earth and various stars seem chaotic, they actually

Generally speaking, it still follows the law of rising in the east and setting in the west. The only thing that doesn't move is the eternal North Star!

The celestial phenomenon was demonstrated with a clear image, which was so vivid and lifelike that everyone was caught in the act, not even blinking. It was as if the infinite mysteries of the universe were all wrapped up in this small instrument.

As time went by, the sound of the waterwheel outside the house gradually stopped, and the whole scene slowly stopped turning, returning to its original calm appearance. However, the amazement in everyone's eyes still did not diminish at all. Zhuge Xian was so proud that he couldn't help but put his slightly sarcastic smile on his face.

His eyes turned to Qiao Xiu.

) Hundreds of years later, at the end of the Ming Dynasty, Western astronomy and astronomical telescopes were introduced to China, which replaced the dominance of the Huntian theory. It is the same reason.

In the past, Qiao Xiu was evenly matched with Zhuge Xian, but that was because neither party had any instruments at hand. Astronomy is a very practical subject, and relying solely on imagination, it is difficult to put forward arguments in your favor to completely convince your opponent. However,

, Zhuge Xian used his killing weapon today, Qiao Xiu was obviously at a disadvantage, and he couldn't help but turn to Qiao Minzhi for help.

Qiao Minzhi's knowledge came from Qiao Xiu, and his view of the universe was also based on Heaven's Theory. But at this time, what could he help? In theory, it was difficult to distinguish between the two sides, but the other side had the Armillary Sphere and the Armillary Image as helpers, so he had to ask

Father shook his head.

Qiao Xiu felt a sense of powerlessness all over his body, which made him surrender. He was unwilling to give in, especially when Zhuge Xian, an old guy, deliberately put on a wan look with his beard stroking and a slight smile. It was so annoying!

Qiao Xiu's expression suddenly changed, then she looked at Yunfeng and asked: "Duanshan, since you have some understanding of the Huntian theory and the Gaitian theory, what is your opinion?" In fact, he didn't hold out much hope.

, Yunfeng's age is put there, he is only in his twenties. He has to lead troops to fight and manage internal affairs, so how can he have time to observe astronomical phenomena? If Yunfeng is said to be proficient in astronomy, Qiao Xiu will not believe it even to death.

This question is like treating a dead horse as a living horse doctor.

The rest of the people obviously had the same idea, and Yu Wenjun even snorted coldly, his nose almost raised to the sky!

Yunfeng said calmly: "Teacher, I believe that relatively speaking, Xuan Ye theory is more consistent with the reality of the universe than Hun Gai Er theory."

"Huh?" Everyone looked at this person. Xuanye said that it was one of the three major schools of astronomy in ancient China. However, because the theory was too advanced, it was not taken seriously by the rulers and was not widely spread. It advocated that the universe is infinitely broad.

The sky has no color at all, it is only the infinite height that is seen as blue. The sun, moon and stars naturally float in the void, relying on the action of Qi to move or remain still.

Celestial bodies have different motion states and different speeds because they are not attached to the tangible sky, but floating in the air. Xuan Ye theory is quite meaningful even from the perspective of modern people, and its further development

It is believed that celestial bodies, including distant stars and the Milky Way, are all made of gas. Unfortunately, such an outstanding idea has gradually been lost in the long history.

As soon as Yunfeng finished speaking, Yu Wenjun immediately retorted: "Although Wenjun doesn't understand celestial phenomena, he has heard stories about unfounded worries. If according to what Xuan Ye said, the sun, moon and stars are all floating in the sky, then why not

Will it fall? What if it does fall? Wouldn't it make a big hole in the earth?"

What Yu Wenjun asked was the most criticized point of Xuan Ye theory. Yu Xi, the imperial eunuch of the imperial court at that time, supported Xuan Ye theory. His answer was that the sky is too high to be infinite, the earth is too deep to be measured, and everything is correct.

, the circle is all round! In short, the sun, moon and stars move independently and have their own laws! However, due to the lack of observational data, it cannot be convinced by most people.

Everyone turned their eyes to Yunfeng again. In their opinion, Yu Wenjun's questioning hit this person's Achilles' heel. Qiao Xiu even felt a trace of regret. What's the point of doing something good? It's better now.

This cheap disciple will make a fool of himself.

Yun Feng smiled slightly: "The reason why the sun, moon and stars do not fall is because the earth we live on is also a sphere, let's temporarily name it the earth. It floats in the universe like other celestial bodies, and is separated by unimaginable distances from each other.

distance, and the universe is boundless. In this case, how can we talk about falling? Maybe there are many stars in the sky that are bigger than our earth!"

Brush! Brush! Brush! Contempt, disdain, pity! In short, none of the glances cast towards them were filled with suspicion or deep thought. Even the most obedient Song Bao and Xiaolan Xiaohui looked at them.

With regretful eyes, it was obvious that this person was talking nonsense when he was at a loss for words! If Yunfeng's identity had not been taken into consideration, he would have burst into laughter at this time.

Yu Wenjun's fighting spirit was instantly high. The guilty feeling he felt since Wei was discovered was finally completely destroyed by Yunfeng's nonsense. He immediately said proudly: "General, you are really good at making up. If the earth is round, then the people standing on the back

Why won't it fall? Wenjun thinks about it for you, maybe you will answer, everyone is standing on the upward side, is Wenjun wrong?"

Yun Feng said lightly: "There is a force of mutual attraction between matter and matter, which can be called universal gravity. For example, when a peach is ripe, it will fall to the ground, or if you throw a stone into the sky, no matter how hard you use it,

How big is the stone? This stone will eventually fall to the ground. This is because the earth on which we live exerts a gravitational pull on all objects attached to it!"

"This..." Yu Wenjun was speechless for a moment. After thinking about it for a moment, he realized that what Yunfeng said was a common phenomenon.

Qiao Minzhi took it and raised his hand: "The example given by the general does have some truth, but it is really unbelievable that the earth is spherical. The ancient sages have never said this. I wonder if the general can provide evidence?"

Yunfeng asked back: "Since Teacher is well versed in celestial phenomena, I must have observed a lunar eclipse. When a lunar eclipse occurs, the arc-shaped boundary between light and dark on the moon can prove that the Earth is round, because it is blocked by the Earth's shadow.

The moon is also a round sphere, rotating around the earth. When the moon moves to the shadow part of the earth, the moon and

The area between the earth will see a piece of the moon missing because the sunlight is blocked by the earth. At this time, the sun, the earth, and the moon happen to be in the same straight line. Another point is that fishermen living on the seashore can see that the moon is missing from the distance.

When ships approach from anywhere, the sails always appear first, followed by the hull. This just proves that the earth we live on is spherical."

"By the way, Wenjun remembered it!" Yu Wenjun suddenly exclaimed: "The last time I saw Jie Zhao's ship at Haimen, it was exactly as the general said, the sail appeared first, and then the hull. Wenjun almost forgot

It’s over!”

After saying this, Su Qizhen also remembered it and nodded repeatedly.

Zhuge Xian, Qiao Xiu and his son were lost in thought. Although the three of them had never been to the beach, they had all observed the lunar eclipse. They couldn't help recalling the scene at that time, and their eyes flashed with confusion or suspicion from time to time.

Yun Feng nodded secretly. He did not expect these people to accept the fact that the earth is round all at once, but he hoped it would bring them thinking and doubt, and encourage them to explore and study.

After a while, Zhuge Xian asked: "The difference between day and night is exactly the result of the sun and moon rising in the east and setting in the west around the earth. If we follow your explanation, general, how should we explain day and night?"

Yunfeng nodded and said: "Hello, Lord Zhuge, the reason why a day is divided into day and night is that the earth is a rotating sphere. One side faces the sun, and the other side must be night. As Xuan Ye said, all

The planets were originally gases. They condensed into solids due to the centripetal force generated by the rotation. Although the condensation was successful, the rotation process would not stop, but would only become slower and slower. At the same time, this process was extremely slow, so that

Unnoticed by others.”

What Yunfeng said is becoming more and more incomprehensible. Think about it. The East and the West are completely two philosophical systems with no intersection. On the one hand, Yunfeng's purpose is to try his best to open a door for scientific development;

On the other hand, it tries to combine Eastern and Western philosophical systems, taking the best of the West and discarding the dross of the East, to create a new philosophical system.
Chapter completed!