Li Ke said that Taoism is not as harmful as Buddhism, and some people may use examples such as Zhang Jiao, but it is necessary to distinguish clearly.

The rise of Buddhism will lead to the decline of a dynasty from prosperity to decline, and Taoism seems to break out when such a thing as Zhang Jiao erupts, can Taoism be blamed? Why didn't the horns appear in the early and middle Han Dynasty?

The people can't live anymore, let alone preaching, Chen Sheng and Wu Guang shouted and followed, Zhang Jiao is just a head, the fundamental reason is not caused by Taoism, but Buddhism can really make a country from prosperity to decline, this is the fundamental gap.

Yuan Tiangang and Li Chunfeng looked at each other, and then said seriously: "Your Highness, since we are officials in the imperial court, we will inevitably contribute our own strength to the Tang Imperial Court." ”

"Well, in fact, your knowledge of astronomy and geography is of great use." Li Ke said with a smile.

"Astrogeography?" The two of them probably understood what it meant.

"Yes, I call the knowledge of observing the stars astronomy, and the knowledge of mountains and rivers as geography." Li Ke nodded slightly, "Your knowledge inheritance in astronomy is very worthy of cultivation. But I have a question, you think the earth under our feet is round, so what about the sun, moon and stars? ”

"Our Taoism supports the Hun Tian Theory, although there has always been a school of Gai Tian Theory, but in fact, we have proved that the Hun Tian Theory is true from multiple angles." Li Chunfeng said.

"Including long-distance observation of distant peaks, ships, etc., the top is the first to be exposed, and then the bottom is exposed, which proves that the earth is arc-shaped, and the change according to the height of the sun and moon can show this." Li Chunfeng explained to Li Ke.

"Well, I know, in fact, the earth under our feet is a spherical shape, so have you ever thought that the sun, moon and stars we see are actually the same existence as the earth under our feet? It's just that they're so far away from us, so we only see a little bit. Li Ke asked with a smile.

"Huh?" Yuan Tiangang and Li Chunfeng were both stunned.

"That'...... So if that's the case...... How far should that be? This universe is so big...... "The brains of the two people instantly felt stunned.

Li Ke was a little amazed, he just mentioned that the sun, moon and stars are the same as the earth under his feet, Li Chunfeng thought of the question of how far away it is, obviously his heart is a concept, like the earth under his feet, a vast ball, in the sky is just such a small point, that distance is obviously extremely far.

Even thinking about the vastness of the universe, I can only say that excellent people are really geniuses.

"Indeed, in fact, these are all data that can be calculated, if you two are willing, I can tell you how to calculate these things when you have the chance, but only if you learn my new style of arithmetic here."

"Moreover, I have another thought, since you are all proficient in observing the heavens at night, have you ever thought that it is not the sun, moon and stars that revolve around us, but the earth under our feet, and some of the stars revolve around the sun?" Li Ke said as he simply stretched out his finger and dipped the tea that had been cold in the teacup and drew it on the table in front of him.

After drawing out the approximate galaxy map of the solar system, Li Ke asked with a smile: "Is it possible that the sun, moon and stars operate like this, I call this galaxy, and the stars farther away are countless galaxies like ours that make up the universe?" The bright stars in the night sky, is it possible, it is farther away from the sun! ”

Li Ke didn't mind throwing some bombs at them, because astronomy is such a thing, in fact, he is not afraid to throw theories at them, it is not quite the same as others, the sooner astronomy establishes a theory, the better, anyway, the research is slow, let them study it slowly.

And don't underestimate the determination of the ancients to verify these things, there are really many geniuses, once they go to the right path, many of their theories that they could not verify in the past can now be verified, for example, the four seasons of the year, for example, the clouds and sunny months.

"This ......" Yuan Tiangang and Li Chunfeng have been completely suppressed.

They were stunned by Li Ke's bold idea, but looking at the fading galaxy map on the desktop, there seemed to be an inexplicable magic in it, attracting them.

"Your Highness, can you elaborate on it." Li Chunfeng felt that his heart was like a cat scratching.

"Actually, it's very simple, for example, if I name the earth under our feet the earth, then if the sun is a glowing sphere, when the earth revolves around it, then as a sphere, there will always be a part of the sunlight, and when the earth revolves around the sun, it rotates in one direction, so we have day and night, and the sun rises in the east and sets in the west."

"So why is the moon, which revolves around the earth, not hot when it hits the earth? Is it possible that its bright side is actually illuminated by the sun's rays? Because of the distance, we see that it is also glowing. ”

"It's like when we are on Earth, when it's daytime, this bright side, if we stand on the moon, don't we see that the Earth is also glowing? Because the distance is far enough that we can't see the details. ”

"The moon's cloudiness and lack of moon are understandable, because when it revolves around the earth, the earth sometimes blocks the light from the sun, so it can only shine a part of the light, so we can only see the new moon, the half moon, and finally the full moon."

"And how often does the moon revolve around our earth, it's a month, and how often does the earth revolve around the sun, let's name it a year." Li Ke smiled and told the basic astronomical knowledge of the later generations to about three people.

Li Chunfeng and Yuan Tiangang were already stupid to listen to.

Because the more Li Ke spoke, the more they compared it with the knowledge of the sun, moon and stars in their minds, and then they found more and more that His Royal Highness King Qin said...... It's a complete set of theories, seamless theories!

Everything found evidence of why the south is hotter and the north is colder all year round, spring, summer, autumn and winter.

Why do the seasons rotate in a year and so on!

"You can even think about why the earth revolves around the sun, and what kind of force causes so many stars to revolve around it. If the surroundings of our earth are empty, why do we still fall to the ground? Li Ke said with a smile.

"Your Highness...... Chunfeng has seen His Highness, no, Chunfeng has seen Mr., I wonder if Chunfeng has the opportunity to learn from His Highness? Li Chunfeng stood up directly, and then bent down to give Li Ke a big salute.

The same is true for Yuan Tiangang next to him, Li Ke has brought them too much shock!

"Two of you are exempt." Li Ke smiled and waved his hand to excuse the two of them, and then said: "So I said, you Taoism still has some uses, but I also know this knowledge, and I don't know why, some things, some laws need you to find, such as arithmetic is a must, because you know a lot of knowledge, you may be able to calculate how far away the moon is from our earth." ”

"How far is the sun from our earth?"

"Everything in the world has its own laws, and this law can be expressed in numbers."

"Therefore, if we want to understand the relationship between these astronomy and natural phenomena such as wind, rain, thunder and lightning, we need some geniuses, and I think there must be some talents in this area, and you Taoists are all over the world."

"I can build a school here in Chang'an to teach this group of people this knowledge, and then record the knowledge you have studied, and I will print it into a book and pass it on from generation to generation. Historically, there will inevitably be your names. Li Ke said with a smile.

Sun Simiao was a little helpless when he heard it, yes, I know this well.