"Is the outside world beautiful?"

"Beautiful. But without our national beauty, Datang is the most powerful and prosperous country in the world. Li Yaoyu said lightly, a simple sentence, but it made him full of pride in his heart. Before the Qing Dynasty, China was the first power to stand on top of the world, which was the pride of the Chinese and the dream of the Chinese - to achieve great rejuvenation.

And the most powerful era in China was the Han and Tang dynasties. The years of the Han Dynasty have passed a long time, and the era of the Tang Dynasty is coming, and Li Yaowei is fortunate to witness its rise.

The lonely sun carries the clouds, and the stars rise with the moon. After dinner, Li Yaowei sat on the gazebo to admire the moon, listened to Xiao Qin play the piano, and drank the wine bought at the Xitian Restaurant, not to mention how comfortable it was. Taking advantage of the cool breeze of the autumn evening, Li Yaowei was so happy that he couldn't help singing:

The white waves of the tide are faintly sounding, and the fast and slow three knocks have been changed

The lonely willow is graceful and the flowers are gorgeous, and the stars are bright in the moon.

Bochi was drunk and rippled with tears, and Sleeping Yan heard the sound of Qin dreams.

The short pavilion of the landscape is near the sea pavilion, and the golden autumn has a good mood.

Hearing Li Yaoji's poems, everyone calmed down, read them carefully, and appreciated them carefully.

"It's so good to be a good minister." Du Manwan couldn't help but boast.

"I think so too." Li Yaojian said proudly.

Everyone: "......"

Xiaoxuan smiled and said: "Xianggong, you have changed, you used to be very modest, but now your skin has thickened." ”

Fifth Yao glanced at him and said lightly: "He has always been very thick-skinned. ”

Li Yaojian looked at the black line, and said in his heart: You have also become arrogant. No, Fifth Yao has always been arrogant...... "Do you know why the sea water is rising?" ”

Everyone shook their heads, although they all knew that there was a tidal phenomenon, but they didn't know why. Li Yaojian smiled, pointed to the moon, and said, "Because of the moon." It attracts sea water. ”

"Huh?" Everyone was stunned, the tide of the sea was actually because of the moon?

Li Yaojian explained: "I said before that each of us can stand on the ground because there is a force on the ground that sucks us, and similarly, the moon also has a power that sucks us, but the power of the ground under our feet is much greater than the power of the moon, so it is not sucked away by the moon." But because the sea is too big and too big, it will be pulled by the attraction of the moon, and the tide will ebb and flow. ”

The causes of the tidal phenomenon are complex, and in order to make them understand, Li Yaojian explained it simply.

"Then Xianggong, why is there more sea water to be attracted?"

"Because attraction is related to weight, the heavier the thing, the more attraction it receives."

Seeing that they were all meditating, Li Yaowei sighed, and he was also embarrassed for them. Many things are difficult to understand without being exposed to systematic science education, but Li Yaojie didn't expect them to understand everything, because it was useless to understand......

"The moon has always surrounded us, rising in the east and setting in the west, is it also because of the attraction you said?"

Li Yao was stunned, gave a thumbs up, and was dumbfounded: "The lady is smart!" ”

Fifth Yao was praised as a little unnatural and shy.

"Then why doesn't the moon fall to the ground?"

"Uh...... This reason is a bit complicated, you can't understand it...... "The movement of celestial bodies involves the knowledge of gravitation and centrifugal force, Li Yaojie doesn't know how to say it, they don't even understand the basic knowledge of physics, and it is estimated that it will take a long time to understand it, and it may not be able to teach it, which is second only to teaching an ignorant child."

Hearing Li Yaoji's words, Fifth Yao was not disappointed, but nodded: "We haven't been exposed to these things, and it's really not easy to understand." ”

Du Manwan drew inferences: "Is it the same with the stars and the sun in the sky?" ”

"Nope." Li Yaowei denied, "On the contrary, we revolve around the sun. ”

Others were stunned again: "Then why does the sun rise in the east and set in the west?" ”

"Xiaoxuan, go get that globe out."

Li Yaowei held the globe in his arms, "If this stone table is the sun, we will revolve around it like this." But at the same time, the ground under our feet also turns on its own, and that's it. So, when we turn to face the sun, it's day, and when we can't see it, it's night. In addition, we are the people who live in the place behind us during the day, and they are the night. ”

Everyone nodded in understanding. Li Yaoyu also said, "When our earth turns around itself, it is exactly one day, but when we circle around the sun, it is exactly one year, and the cycle repeats. ”

Xiao Xuan had little stars in her eyes, and she completely turned into a fan girl: "It's amazing, how do you know so many things?" ”

Du Manwan, Xiao Qin, and Su Yue also looked at Li Yaoyu incredulously, this man is really amazing! In this world, there seems to be nothing he doesn't know.

Li Yaojian laughed: "Well-informed, well-informed." ”

"I don't believe it." Xiaoxuan pouted, well-informed? So why hasn't anyone else seen it?

"Xianggong must be the pride of heaven once in a thousand years." Du Manwan praised from the bottom of his heart.

"Haha. Don't praise me like that, I'll be shy. Li Yaojian said cheaply, but he thought in his heart: It is indeed a once-in-a-millennium encounter, but it is a once-in-a-millennium traverser, and I don't believe that there are other people who have also crossed over.

“……”

"By the way, what about the stars? Do we revolve around the stars? Su Yue thought of this.

"Not really." Li Yaowei once again denied, "We revolve around the sun, the sun revolves around the Milky Way, and many stars in the sky also revolve around the Milky Way. ”

"Ah, it feels like a mess. The moon surrounds us, we surround the sun, so how does the moon turn? ”

Li Yaojian dipped his fingers in some wine and demonstrated on the stone table: "When the moon turns, it also follows the earth, so ......"

When the women imagined this picture in their minds, they could all understand, "When the sun turns, it actually has a bigger circle?" ”

"Yes."

This time they couldn't conceive it, and they felt their heads explode, "It's so complicated, I don't want to." ”

Li Yaowei looked at them with tears and laughter, everyone in modern times is also dizzy when they come into contact with these astronomical knowledge, this universe is so big, so big that human science and technology have not yet explored one-hundredth of a billion......

"What about the rest...... Is there anyone on the ball? Is there a fairy Chang'e on the moon? ”

Li Yaowei smiled and shook his head: "No, at least I haven't found it yet." ”

Thinking of what Li Yaoyu had said in their minds, everyone looked at the stars and moon in the sky in a daze. In the past, they didn't think much about it, they only cared about whether they could eat enough, sleep well, be happy every day, and have a happy life. I never thought what the world outside of them would be like. After listening to Li Yaoji's words tonight, they felt that the world was too complicated, and they were also very curious, what would be the situation after leaving the land under their feet?

Li Yaowei also looked at the night sky, and he also wanted to know, how mysterious is this vast and boundless universe? How far can scientists go? Well...... No, the extent to which scientists have explored has nothing to do with him, nothing to do with him in this era......

And, science, can you explain why Lao Tzu crossed?

Is this scientific?

……

……

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(End of chapter)