Fengming Academy has rarely been as sensational as it is today, and the large stepped classroom was full of people early in the morning, with outstanding student representatives such as Zhao Ji, Mu Xijing, and Wu Yuan; There are also people like Gongzi Shaoguan, who often provoke various disputes and persevere to bring vitality to the academy; On the main podium, there were old masters of the academy such as Master Yan, Master Meng, and Yang Zhu Yangzi.

Even Wei Ying, who was busy with the second change, actually came, Bai Dong's appearance made his journey of changing the law surprisingly smooth, and some of the difficulties and setbacks that should have happened did not appear, and now he started the second change at least ten years earlier than in history; Although the specific terms are still being determined, most of them have already been supported by Yingquliang and Bai Dong, and there are lessons from the three families of Mengxi and Bai, even if some people will oppose it, most of them will be in the law, and it will not cause the disaster of national turmoil.

Is this dean determined to stick to his side doctrine? Old Master Yan Jian, Master Meng and others, who were sitting on the side of the main podium, looked at the students who were talking about it, and they were a little nervous in their hearts, and even Yang Zhu, who had always had the courage to accept the new doctrine, had a stern expression on his face.

The 'Tianxing Course' launched by Bai Dong three months ago is really too novel, and it is completely different from the previous thinking and arithmetic. Although those studies are relatively new, they are not ignorant of them, and some of the views and theories of Sixue are inherently interoperable with the theories of the hundred schools, and they also have the meaning of arguing in the middle and the mean; Not to mention arithmetic, there is already one of the six arts of the gentleman, Confucianism is not unfamiliar, and the worker is even more proficient, so there will be no sense of rejection.

But what kind of knowledge is the astrological technique taught in this astrological class? It is true that there has been a Si Xing faction since the time of Yin Shang, and there is a person named Wu Xian who also wrote the "Wu Xian Xing Sutra", but it is a thing entrusted by mediocre people to heaven and earth, confusing the king and confusing the people. For example, what other country would appoint a star officer today? Not at all! It can be seen that this is not the right way to learn. It is because it has not been listed among the hundred schools for a long time. The dignified dean of Fengming Academy, the world-famous Bai Zi, suddenly wants to list this course? Shouldn't you go crazy when you go to Qi Country?

The matter of Tian Ji horse racing has now been faintly revealed. Everyone didn't know that Tian Yinqi gambled on the position of the master of the Jixia School Palace for this reason. It's just that Bai Dong became famous at a young age and finally couldn't keep it, and he began to be frivolous. Gambling on horse racing? This is not what a generation of scholars should do

To defeat the enemy, you must first understand the enemy. So on the day Bai Dong started class, the first person to run was the most fierce opposition to Old Master Yan, but unfortunately most of the students who took the "Tianxing Class" were interested in arithmetic, except for outstanding students like Wu Yuan and Mu Xijing, more than half of them were girls; It was too eye-catching for him to hide in the group of girls as a white-haired old guy, and as a result, Bai Dong respectfully invited him to the main podium to listen to the lecture, accompanied by Meng Fuzi and others and fleas who came to cheer for his husband

It turns out that there are different heights when people stand on the ground? If you contact the sun, moon, stars, and earth centers in the sky. Can you get a degree? The maximum is only 90 degrees, what is the north latitude and the south latitude? After all, Old Master Yan is a generation of scholars, and after listening to a few lectures, it is naturally not difficult to understand what this latitude means with his arithmetic ability. Although latitude was not exactly the same as the altitude he understood, he could imagine that it would be very useful if it were used to determine the position of the vast grasslands or the sea; Although the Chinese people also have various means of determining the direction and direction, it seems that the tools and numbers are finely stipulated, and Bai Dong is really the first.

Lao Yan Jian, who had reluctantly accepted the star-pulling technique, secretly asked for a few star-pulling boards from Gong Zhizhi, and ran around with a few masters to experience them; He found that Bai Dong was really not lying, and the degree obtained by standing in the academy at night and running to the mountain to measure the 'North Star' was indeed different. However, the so-called dimension is only 90 degrees at most, so it still doesn't seem to be enough to determine the direction, right? This is the question that the old master raised about Bai Dong after concentrating on research, and I want you to know it. Ben Fuzi is also a smart person, and he can easily find out the flaws in this science!

Bai Dong quickly replied: "Latitude alone cannot accurately determine the direction. Even if it is possible in a small area, it will not be accurate in a larger area, so we must combine longitude to determine the position. The sun, moon and stars are already used to measure latitude, so to measure longitude we have to reset a source point, which is called the prime meridian.

In fact, even if he didn't tell the truth of the earth, Bai Dong could put forward the concept of 'prime meridian' in some kind of deceptive language; Lao Yan Jian and these people had never even come out of Huaxia, and it was too difficult to expect them to expose this lie. But Bai Dong can't afford to lose this person, because with the concept of latitude and longitude, with the gradual popularization of the white shipbuilding method, the world will set off a wave of navigation in the next hundred years.

I remember that when I was a student, the most and most tragic thing in the textbooks was the old man Aristotle, who was obviously the greatest scholar of ancient Greece, but because of the limitations of history, he was pulled out again and again as a representative figure of 'false doctrine'. When Bai Dong was a teenager, he once thought that Aristotle was a failure, but he didn't know that he was as great as Archimedes, Newton, Edison, and Einstein.

This kind of tragedy must not happen to himself, so from the very beginning, Bai Dong had to put forward the most correct viewpoint, break the theory that the sky is round and the earth is round, and establish his own 'round ball' theory. The state of Qin is not ancient Europe, and the white son of the old Qin has time to expound and prove his views, and he does not have to be afraid of being burned at the stake like Bruno.

"The world we live in is a sphere, and like all round objects, it has two 'centers' at the top, and a 'circle' at the largest circumference, so no matter where we draw a line from this sphere, it will return to this point again, and this line, we can call it 'prime meridian'. What if there were more lines like this? We can see that there is an extra 'fishing net' on this sphere, with an infinite number of grids, and the distance between the grids is the 'longitude'. With the longitude of this artificially created zào, combined with the dimensions obtained by the astrological technique, it is easy to determine any position. ”

Bai Dong has tried his best to tell the 'prime meridian' and 'longitude' in a language that Lao Yan Jian can understand, in order to be more vivid, he even asked the public loser to make a wooden ball, and he took a pen to draw a warp on the ball: "The prime meridian can actually be set in any place, such as the palace of the Zhou royal family, the girder of the Wei State, or even a random small bamboo building in the Shu Kingdom." But I'm still going to set it at Lao Qin, well, let him pass through the palace where the king lives, and then the world will have to use our old Qin as the source point to calculate the longitude where they are. ”

This man is completely insane!

Lao Yanjian and the others were dumbfounded when they heard this, and even Xu Zi, a farmer who strongly identified with Bai Dong because of the invention of Quyuan pear, stared at Bai Dong in surprise and looked at Bai Dong like a monster. Yang Zhu slapped Wei Ying's thigh beside him, he wanted to stand up and cheer, but Wei Ying pulled him on the seat; This kid is really amazing, worthy of a character who even I want to bow down to actually say that the world we live in is a round ball? His mother-in-law's, if this world is a round ball, how can the endless Guanzhong Plain be explained? Why didn't you see Lao Tzu go out and roll all the way down? If the old Qin people stand on this ball and don't fall, then shouldn't the Wei people have to fall? Not to mention the people of Chu, but it's very interesting, this kind of strange talk is Lao Tzu's favorite.

He is afraid that the world will not be chaotic, but Lao Yanjian is so angry that he trembles; He can barely accept the concept of astrology and latitude, that is because Bai Dong's foundation has not departed from the avenue of scholars, after all, the art of stargazing is also something that has been handed down from the Yin Shang era, although it is not in the eyes of a hundred schools, it can be regarded as a knowledge.

It is too unbelievable to say that the world is a round ball, what prime meridian you want to set up, if you want to set it in the Qin country, it will be set in the Qin country, who let it be your kid who proposed it? But what does this have to do with whether the world is square or round? Is it not the way of decent education to propagate fallacies and heresies in this way? The dignified Fengming Academy is about to go to the side door and go left!

Lao Yanjian must be opposed, in his opinion, this is no longer a matter of academic division, but a matter of principle. In the face of such fallacies and heresies, the hundred schools of thought should rise up and attack in groups, so that this kid can be sober and sober.

Academic wars are sometimes more terrible than real battlefields, and Lao Yan Jian can't care about Bai Dong's face, so he was about to shoot the case immediately, but fortunately he was stopped by Meng Ke; Meng Ke is not more cultivated than him, but he privately got the news from Tian Yinqi, knowing that Tian Yinqi will support Bai Dong as the master of the Jixia School Palace in the future, this kid has such a rare opportunity, how can he defile himself for no reason? Since he said that the world is a ball, there must be a reason, so you might as well listen to it first.

Compared with the masters, the students in the audience reacted more violently. The young officer of Gongzi laughed the loudest, and he laughed so hard that he even discarded the mission of defending the Bai family's elder brother; Some female students exclaimed in surprise and covered their lips one after another, they couldn't figure out how the young, handsome, talented and knowledgeable Bai Zi could suddenly say such a thing; Only Wu's eyes suddenly lit up, and he stared at Bai Dong tightly, only hoping that Bai Dong would continue to speak; Mu Xijing and Zhao Ji were both the best among the students, but they were both frowning and thinking hard, and it was difficult to understand Bai Dong's words for a while.

"You heard it right, the world we live in is a ball, and a ball floating in the air! And far, far away under our feet, there are people who live, they are on the other side of the sphere, so we are also under their feet" (to be continued......)