The first rebel of the Tang Dynasty

"Dai Zhou, what do you think this is?"

Li Shimin always asked.

How did Dai Zhou know?

And at this moment, a voice came from beside him.

Li Shimin's words were interrupted.

"Welcome to the astronomy section of Shengtang Library!"

Li Shimin turned his head to look, but did not find where the sound came from.

It turned out that there were several audio-like existences around me.

When people come here, there will be a voice to introduce everything here.

What an amazing thing.

This will be called Multimedia in the future!The only difference is the image, but the model can replace the image, and it makes people feel extraordinarily different when they are in it!
In this way, it makes people feel a little smart.It's like a person standing next to you and explaining everything.

In ancient times, this is simply a masterpiece.

The voice didn't wait for them to react, and then said:

"Your location is a model of the solar system. The sun is surrounded by eight planets. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune in order of distance from the sun. Our location is called Earth. It is the third planet from the sun, and among the eight planets, it is a habitable planet."

The voice introduced.

This has refreshed Li Shimin's cognition.

It is so!
Is this the unknown world?It turned out to be so big!
He murmured: "We live on the earth? Is the earth round? What about the sky? Is it also round?"

At this time, the model of the earth lit up, it was so small!this……

This has completely exceeded his cognition.

He was so ignorant before!
But then again, is all this true?Is there any basis?Everything is unknown!
The voice did not stop, but went on to say: "About [-]% of the earth's surface is made up of continents and islands. The remaining [-]% is covered by water, most of which are covered by oceans, bays and other salty water bodies, and also by lakes, Covered by rivers and other bodies of fresh water, which together make up the hydrosphere. Most of Earth's polar regions are covered in ice."

This knowledge was forcibly poured into Li Shimin's head, and every word was shocking.

"Earth's atmosphere is mainly composed of nitrogen and oxygen."

What is this?What is nitrox?What kind of existence is that?

The voice continued, and continued:
"Earth's gravity interacts with other objects in space, especially the moon, which is what we call the moon and is the only natural satellite of the earth. It takes about 365.25 days for the earth to revolve around the sun. The axis of rotation of the earth is relative to the Tilting the plane of its orbit, thereby producing seasons on Earth. The gravitational interaction between the Earth and the Moon causes tides, which stabilize the Earth's orientation on its axis and gradually slow its rotation.

It takes one day for the earth to rotate once!When facing away from the sun is night, facing the sun is day! "

At this time, a sphere smaller than the earth lights up.

This is the moon, right?
The tides are actually caused by the moon.

Li Shimin's whole body is going to be demented.

A kind of knowledge that he could not understand at all was placed directly in front of his eyes.

"The earth is surrounded by the atmosphere, and these atmospheres, in the eyes of the people on the earth, are the beginning of the sky! The stars seen here are planets one after another."

The stars in the sky are planets one after another.

This touched Li Shimin's knowledge blind spot again.

It turned out to be the case.

In ancient times, it was thought that the stars were the eyes of gods!Or people become stars after death.

And maybe it's the incarnation of the gods in the sky or something.

For example, Wenquxing is one of the Big Dipper.It is also a fairy star, and so are the other six stars.

Because ancient times could not go to the sky, the understanding of the earth and the stars remained at the level of self-awareness.

However, in the future, with some high-tech equipment, we will know that there is the earth, the sun, and other stars.

And the galaxy...

Wait for all this stuff.

Li Shimin stood there blankly, not knowing what to say.

Dai Zhou was even more shocked.

After a long time, the voice stopped.

Li Shimin murmured: "Is this true? Is there any basis for this?"

Yes, it is obviously impossible to convince him based on these things alone.

"Why don't we read the book? Maybe the book contains an introduction to these things:"

Dai Zhou suggested.

So the two walked towards the bookshelf.

As soon as they left, the voice said again: "Welcome to come again next time! Goodbye!"

This... this is too smart!
The two ignored it, but looked at the bookshelf.

There are many books here.

Rows of books are placed on the bookshelves.

The bookshelves are nearly three meters high.

It turned out to be made of steel, which can be said to be very strong.

There are also movable stairs on the side for people to go up and down.

They went to the bookshelf.

I saw a lot of books and didn't know how to start.

And when they were reading a book, there was a small conversation sound from the side.

"It's unexpected that the earth is round!"

"How to say?"

"This is exactly the same as my experience, and I didn't realize it before."

"When sailing at sea at night, the familiar stars will gradually disappear, and many stars that have not been seen will appear again. It can also prove that the earth is a sphere, because if the earth is a plane, no matter where you are, the stars you can see should be identical."

"It does make sense. If it is round, the next day, at the same time, at the same location, we can see the same things. If it is square, it will be the same no matter what time it is."

"Yes, this also proves that the moon and the sun can exist at the same time, just like the moon and the sun during the day. You can understand all this by looking at this diagram."

The phenomenon that the sun and the moon appear at the same time is called: the sun and the moon shine together.

This phenomenon is that the simultaneous appearance of the sun and the moon in the sky is caused by the difference in the rotation period of the earth around the sun and the moon around the earth.

The celestial phenomenon of the sun and the moon needs certain conditions to be directly observed by the naked eye. Generally, it can be seen in broad daylight during the [-]st to [-]rd of the lunar calendar in autumn when the sky is clear and the visibility is good.

Li Shimin was shocked by such evidence before reading the book.

At the same time, I was amazed that Li Yin had studied so deeply.

These things are things they haven't studied.

It turns out that everything the Shengtang Group has done is not just about economics.

There is also the deep cultivation of knowledge that is also shocking.

At this time, Li Shimin was still listening carefully to the conversation between the two.

But at this time, the conversation between the two stopped.

When Li Shimin was puzzled by this, someone came over.

It's an old man in a suit.