By the time he had finished his simple dinner, Gao Wu cleaned up the mess, and the moon had risen by this time.

Zhao Hao pointed the two-foot-long telescope in the direction of the moon and let the two of them look at it in turn.

But this viewing experience is definitely not pleasant......

When the moon in the sky came before their eyes. The two of them clearly saw that there was no sea, no forest, and no sign of life on the entire moon.

Originally, they thought it was a place where the laurel tree, the toad palace, and the jade rabbit were all potholed craters.

The moon, which was as bright as a silver plate and flawless in their ideals, turned out to have a big numb and leprosy face.

"How could this be...... Wang Wuyang and Hua Shuyang looked at each other dejectedly, they really couldn't accept it, the Moon Palace, which contained countless beautiful legends, was actually a dead and silent barren land......

Zhao Hao's experiments only aroused their interest in science, but now the observation of the moon directly challenges their worldview.

"There's nothing strange about that." Zhao Hao still said quietly: "The moon is a planet with pitted oranges, there is no Chang'e, no Wu Gang, no laurel trees, and even no water and air. ”

"The moon is a planet?" The two of them were afraid of missing something, and they didn't care about the shock in their hearts, so they hurriedly asked the teacher, "Master, what is a planet?" ”

"A planet is a spherical body that moves in the universe according to a certain law." Zhao Hao said in a deep voice: "The sun, the moon, gold, wood, water, fire, Saturn...... and the Earth, all planets. ”

"If that's the case, why is it that you can only see the full moon on the fifteenth of the month?" Wang Wuyang asked puzzledly: "It's like today, the moon is obviously missing!" ”

"That's not right!" When Hua Shuyang heard this, he slapped his thigh suddenly, and hurriedly observed again: "I saw the missing part of the moon just now, and there is obviously a black shadow. If you count that shadow, the moon is still round tonight! ”

"Really!" Wang Wuyang also leaned over to take a look, and sure enough, he could clearly find that the overall outline of the moon was round, but part of it was blocked by something.

"What is it obscured by?" The two asked in unison.

"I'll show you how." Zhao Hao said, holding a small white ball the size of a pigeon's egg next to the lamp. "Because the moon itself does not shine, the so-called bright moon is only the reflected sunlight."

The two of them looked at the small ball that was reflected in orange as if they didn't understand, and asked in a low voice, "That should always be the full moon." ”

"Yes, but as I said, all planets move according to a certain pattern." Zhao Hao said, took out a large ball painted blue, and blocked it between the small ball representing the moon and the candle flame representing the sun.

Then Zhao Hao slowly moved the small ball to rotate around the big ball, and clearly demonstrated the changes in the moon's balance to the two of them.

"The so-called moon waxing and moon waxing is actually how much sunlight can be seen on the earth. Because the moon revolves around the earth. On the first day of the new year, it is in the middle of the earth and the sun, and we can only see its backlit side, so we can't see its existence with our eyes. On the seventh and eighth days of the first month, the moon moves to our side, and we can see that it is dark in the east and bright in the west, which is the so-called 'first quarter moon'. On the fifteenth, the moon goes around the far side of the earth, and then we can see its full face, which is the day of the full moon......"

"I see!" Hua Shuyang suddenly realized: "Then it continues to rotate, and when it reaches the eighteenth or ninth day, that is, today, it will be dark in the west and bright in the east, and it will become the last quarter moon!" ”

As he spoke, he clapped his hands, and Ying Wu said: "It's been exactly a month to turn around!" ”

"You can teach." Zhao Hao nodded approvingly, looked at Wang Wuyang again and said, "He understands, what about you?" ”

"I probably understand, it's just according to what the master taught...... Wang Wuyang pointed to the blue ball in Zhao Hao's hand, and his voice trembled a little: "Isn't it that we also live on a ball?" ”

"Yes, Master, isn't it the heavens round?" Hua Shuyang also asked in disbelief.

"Of course not." Zhao Hao took out the last teaching aid from the wooden box - the globe!

He turned the blue sphere, which resembled an armillary sphere, and then gently pressed it, and said to the two students, "This is the earth we live in, and it is three-quarters covered by sea, and the other quarter is land. ”

The two students looked fixedly at the blue globe, the few pieces of land marked with different colors, and soon saw the location of the Ming Dynasty.

"Are we here?" Hua Shuyang leaned closer and looked at it carefully: "This bug-like place next to it is...... Japan? ”

"Ah, the Franc machine is here! It is so far away from us that the countries of Taixi are so far away from us? Wang Wuyang shouted on the other side: "It is really not easy for the sailboat of the Francophile to sail to Daming!" ”

"Yes, although I don't want to say this, I still have to admit that the current Taixi countries have gradually caught up with the Ming Dynasty, and even surpassed us in the fields of navigation, astronomy, and mathematics." Zhao Hao sighed and said, "For example, the earth is round, they were the first to discover and prove it. ”

"How did they prove it?" Hua Shuyang asked in shock.

"A hundred years ago, the theory of the circle of the earth had spread in the kingdoms of the Taixi, but there were always people who did not believe it. So forty or fifty years ago, there was a Franc captain named Magellan who decided to set out on a voyage around the world. Because if the earth is round, as long as he keeps sailing in one direction, sooner or later, he will return to the starting point. ”

Both of them understood this, but they just nodded slowly and did not speak.

They were completely amazed by the great navigator's feat.

I only heard Zhao Hao say to the two of them in a deep voice: "In 1519, that is, in the thirteenth year of Zhengde, Magellan, with the support of the king of Spain, led five ships and two hundred and seventy sailors from the port of San Rocal, Spain, to start this greatest expedition in the history of mankind!" ”

Zhao Hao said as he slowly drew lines on the earth with a brush: "They first crossed the Atlantic Ocean in seventy days and came to the coast of Brazil, and then went south along the coast, bypassing South America and entering the Pacific Ocean. After sailing in the Pacific Ocean for more than a hundred days, he came to Luzon. ”

"Luzon?" This place name is familiar to the two of them, which has entered the traditional sphere of influence of the Ming Dynasty.

"Then they crossed the Indian Ocean, arrived in Africa, bypassed the Cape of Good Hope, traveled north along Africa, and finally returned to Spain......" Zhao Hao expressed his respect for the pioneers in a deep voice: "At that time, they were only the last ship, eighteen sailors, and even Magellan himself had already died halfway. ”

"But they proved in the most indisputable way that the earth is round!" In the end, Zhao Hao raised his voice, looked at the two of them with blazing eyes, and said: "This matter is already a household name in the Taixi countries, and you will definitely meet the Taixi people in the future, and you will know the truth as soon as you ask." ”

ps. The second more guaranteed is delivered, and the monthly pass is recommended ~~~~