"Satellites?"

When everyone heard the name of the immortal, they all chattered curiously.

Ying Zheng also muttered, and then said with understanding: "This name, is it not derived from the stars in the sky?" ”

Li Yang stretched out his thumb and praised: "Your Majesty is amazing, the teacher is nameless, and this pseudonym comes from heaven." ”

When Li Yang lied, his face was not red, his heart was not beating, and what he said was as if it was true.

In his opinion, anyway, half of the gods and immortals of the later generations are professionally fictionalized by the clergy, and half are made by the heroes of the human world with incense.

Now, even if I say that the teacher's name is Satellite, it is impossible for someone to say that it is fake.

As for the future, when science and technology progress and people really build satellites, what names they will take is none of Lao Tzu's business.

Take what you like.

Of course, there is no way to use the name of "immortals" to get Yingzheng to accept the view that the earth is round.

Mo said that in this BC, that is, more than a thousand years later, Aristotle gave scientific evidence, saying that the earth is round, the world did not believe it, until the sale of Zhelun's circumnavigation proved that the world began to slowly accept this view, you can imagine how difficult it is to make the world believe that the earth is spherical.

By saying that "the sea level is arc-shaped", it is impossible to think that the earth is spherical.

Since everyone doesn't believe in science, they can only use the name of immortals, anyway, in ancient times, many things were originally stories with gods and the like.

For example, why does it thunder, because there is a thunder gong on it.

Why is there only one sun in the sky, because the other suns were shot down by Hou Yi.

Why are there people in the world, because Nuwa pinched it out.

There are too many examples like this, in short, in ancient times, as long as everything was told in the name of the gods, it could win people's trust.

However, there is a person who has the ability to lie to Li Yang, and that is the admired five-body throw, and this person is Xu Fu who returned to the dynasty a few days ago.

After he left the Prime Minister's Mansion yesterday, he entered the palace and offered kiwifruit according to the set of words taught by Li Yang, and the original fortune calculation was effective, so the emperor did not punish him, and he was able to stay alive and go to court today.

At this time, Xu Fu was amazed in his heart, good guy, he is even more powerful than the old man when he makes up lies!

"So, is the earth really round?" Sure enough, I heard that the earth was spherical, and it was said by the gods, Yingzheng was puzzled.

Li Yang knew that it was time to strike while the iron was hot, so he said: "Your Majesty, there is actually a scientific basis for the fact that the earth is spherical. ”

"Oh? Tell me about it! "Ying Zheng is very interested.

Of course, at this time, the civil and military officials were also very curious, and wanted to know what else Li Yang could say.

Li Yang said: "Xu Fu happens to be here today, in fact, whether the earth is round or not, he has the most right to speak." ”

"What? Xu Fu has the most right to speak! ”

Suddenly, everyone looked at Xu Fu in surprise.

But Xu Fu was confused.

How would the old man know that this heaven and earth are round and square?

Xu Fu originally wanted to help Li Yang fulfill this lie, but after thinking about it, this lie was too ridiculous, so he finally shook his head: "Prime Minister Zhong, where would I know this." ”

Li Yang smiled: "Actually, you know, it's just that you didn't think of it." ”

"Oh? Then please ask the prime minister for advice. Xu Fu said politely.

"As the saying goes, only by standing tall can you see far. In the same way, the terrain is flat, so that you can see the sky. On land, the view is naturally blocked by the mountains, however, the sea is boundless and unobstructed. ”

Speaking of this, Li Yang looked at Xu Fu and said, "Let me ask you, you have been floating across the ocean all year round, haven't you found that the sea level is arc-shaped?"

As soon as these words came out, Xu Fu was stunned: "This ...... The sea level is indeed rounded! ”

Li Yang said with a smile: "The earth, if it is flat, how can the sea level be arc-shaped?" Therefore, the earth is a sphere, and the sea level is the evidence. ”

At this moment, everyone frowned.

Especially Ying Zheng, he has also gone to sea and taken a boat on his eastern tour, so the sea level is arc-shaped, and he has seen it with his own eyes.

For a moment, everyone was shocked, could it be...... Is heaven and earth really a round ball?

It is already a success to make people of this era question the round sky.

Li Yang continued: "Actually, not only the earth is spherical, but the sun is spherical, and the moon is also spherical. Because they are far away from us, we look at them as a ball hanging in the sky, in fact, if one can stand on the sun or the moon, you will find that our place is also a ball. ”

Everyone was stunned by Li Yang's shocking remarks.

At this time, Zhang Cang, a mathematician, was more fond of thinking, and immediately asked a question: "Ask the Prime Minister, if this earth is a sphere as you said, like the globe you made, then how many suns are there?" Are the people on the back side of the earth always facing the night? And why do we have day and night? ”

"That's a good question, I'll have to do an experiment!" Li Yang smiled.

Everyone was confused.

I don't know what kind of fame Li Yang is going to make?

Li Yang knew that this was a good opportunity to popularize science to the world, and if they could know that the earth rotated, it would make Daqin's astronomy and physics more than a thousand years earlier.

Li Yang immediately asked the palace people to fetch a candle flame and placed it on the east side of the globe.

Then he said, "Look, this globe is the heaven and earth in which we live, and this candle flame is like the sun in the sky." Where the sun shines, it has light, so it's daytime, and the back side is night. And the earth is actually alive, it rotates ......"

While saying this, Li Yang slowly rotated the globe and said, "You see, when the earth rotates, the sun's rays gradually do not shine on the place just now, so it becomes night. Until...... As the earth continues to rotate, the sun's dawn slowly descends on the earth again, which is why there is day and night. ”

“…………”

Quiescence!

The whole hall was silent!

Everyone, you look at me, I look at you, everyone is completely stunned by this experiment!

It's not that this experiment is difficult to understand, but that this experiment is too simple and easy to understand, so after reading this experiment done by Li Yang, everyone can see at a glance why there is day and night, and the theory is even more disdainful.

Oh my God! Could it be that what Li Yang said is true?

At this moment, even those who thought Li Yang was ridiculous before had to believe it at this time. Because, apart from Li Yang's statement, you can't find any other theory to explain why there is day and night.

Seeing everyone's surprised looks, Li Yang knew that his experiment was successful!

At this time, it was the mathematician Zhang Cang who asked: "According to this, the back side of the earth, looking up, is also the sky, so what is this sky?" ”

Li Yang said: "The sky is the vast universe, how big the universe is, I don't know, it includes the earth we live in, the moon, the sun, and more distant planets, the stars we can see, they may be as big as the earth we live in, in short, the universe is infinite." It is precisely because it is infinitely large, so you can't tell at all, we are standing on the back of the earth, head down, because the universe is so big, there is no division between up and down, it is so big that it loses its concept. ”

In the end, Li Yang concluded: "So, why the rivers on the back of the earth don't flow to the sky, in fact, because the earth has gravity, so the apples will fall to the ground, not to the sky." ”

This time, no one questioned it anymore, and no one dared to laugh at Li Yang for being nonsense.

Because, with the experiment just now, the theory he is talking about now is not only reasonable, but also unassailable.

Ying Zheng exclaimed: "I can't imagine that you have such a unique insight into astronomy, which really surprises me." ”

Yes, Ying Zheng was really shocked by Li Yang's astronomical theory, especially the experiment, which opened his eyes.

He already believed that the earth was in the shape of a ball, so Ying Zheng moved his gaze to the globe again, looked at it carefully, and then pointed to the land on the globe and said, "This is the land painted on it?" ”