Daming: I, Yang Xian, really govern Yang!

Chapter 227 The sea of ​​stars
  "It's not that I support the Huntian theory, but the earth is round." Yang Xian said.

Xu Miaoyun frowned, because Yang Xian's words were too absolute.

We must know that from ancient times to the present, the dispute over "Hungai" has never stopped.

She looked at Yang Xian and asked: "But if it is true, as you said, Mr. Yang Guo, that the moon is a planet and the earth under our feet is also a planet, then what we see every night should be a full moon. In fact, But that’s not the case, how to explain this.”

Being able to raise this point proves that Xu Miaoyun is really thinking about this issue seriously.

Yang Xian smiled and said: "The explanation of this problem is not complicated. The most critical point is that the moon itself does not emit light."

Xu Miaoyun became more and more confused as she listened. If the moon didn't shine, then what was the moonlight she was seeing now?
  Yang Xian seemed to directly see what Xu Miaoyun was thinking, and said, "The so-called clear moonlight you see is just reflected sunlight."

Why did it involve the sun again?

Xu Miaoyun felt that her brain's CPU could no longer function.

"I'll demonstrate it to you once, and you should be able to understand it. Come with me."

Yang Xian took Xu Miaoyun to his house.

Take out the globe and place it on the table, then take out a prototype ball to replace the moon, and use the candlelight on the table to represent the sun.

Yang Xian simulated the trajectory of the moon around the earth and clearly demonstrated the waxing and waning changes of the moon to Xu Miaoyun.

"The so-called waxing and waning of the moon have nothing to do with myths and legends such as Tengu eclipsing the moon. The truth is that we on the earth can only see how much of the moon is illuminated by sunlight."

Yang Xian explained while demonstrating: "On the first day of the new year, the moon is between the earth and the sun, and we can only see its backlit side. And because the moon itself does not emit light, at this time, we use Its existence cannot be seen with the naked eye, which is the origin of the new moon."

Yang Xian continued to spin the little ball.

"From the second day to the sixth day of the lunar month, the moon rotates counterclockwise at a certain angle. When viewed from the earth, a bright crescent will appear on the left, which is what we call the Emei Moon. I wonder, Miss Xu, have you noticed an obvious situation? , in these days the moon can only be seen when it is just dark.”

"On the seventh and eighth day of the lunar month, the moon turns to a position of about 90 degrees. When viewed from the earth, the right side of the moon is bright. This is the first quarter moon. At this time, the moon can be seen in the first half of the night, but not in the second half of the night."

".Then now, on the 180th and [-]th, the moon has almost turned to [-] degrees." Yang Xian placed the small ball in his hand on the back of the globe, and then said. "At this time, the moon moves to the back side of the earth. At this time, the situation is opposite to that of the new moon. We can completely see the light-facing side of the moon, just like these two days of full moon."

Xu Miaoyun listened very carefully, for fear that she would miss any information.

Yang Xian did not disturb Xu Miaoyun who was deep in thought, but continued to spin the ball in his hand.

Xu Miaoyun looked at the trajectory of the ball in Yang Xian's hand and suddenly said: "If it continues to rotate, by eighteen or nineteen, it will be dark in the west and bright in the east, which is the waning moon!"

"Following this trajectory, it will take exactly one month to complete a circle. This perfectly explains the changes in the waxing and waning of the moon!"

Xu Miaoyun raised her head, looked directly at Yang Xian, and said excitedly.

"That's right." Yang Xian nodded and smiled.

If we want to find a woman in the Ming Dynasty whose thinking of women in this era is closest to that of later generations, Xu Miaoyun, who has the title of female student, is definitely the number one contender.

This can be seen from the fact that she was not constrained by the closed ideas of Cheng-Zhu Neo-Confucianism since she was a child, and read a variety of books to expand her own knowledge.

You must know that she has read a lot of military books and is able to practice martial arts on a sand table with her father.

In the original time and space, King Zhu Di of Yan launched the Jingnan Campaign. Zhu Di led an elite army to attack Daning City. The mantis stalked the cicada and the oriole followed. Li Jinglong took the opportunity to attack Beiping City, Zhu Di's base camp.

Zhu Di's eldest son, Zhu Gaochi, tried his best to defend the city. However, most of the city's defenders were old, weak, sick and disabled, and their combat effectiveness was not high. At the critical moment of the city's survival, Xu Miaoyun, who was a daughter, generously persuaded the people in the city and the defenders, and then wore armor and Holding a long sword, he personally climbed onto the tower to supervise the battle, vowing to live and die with the city of Beiping.

Yang Xian said, "How about it? After looking up at the splendor of the galaxy, do you feel much better?"

"Did your mind suddenly become bigger?"

As he spoke, Yang Xian glanced subconsciously at the girl's breasts.

In ancient times, women developed really early.

Yang Xian coughed lightly and said, "Miss Xu is here in Yangzhou for Duke Wei?"

Xu Miaoyun nodded.

"Are you worried that Wei Guogong, if this expedition to Japan comes back with a great victory and great achievements that shock the Lord, might it arouse His Majesty's suspicion?"

Xu Miaoyun nodded again.

Seeing Xu Miaoyun's appearance, Yang Xian smiled and said, "People who have lived in a mountain village since childhood and have never been out of the mountains will even beat their heads to pieces for a chicken."

"A person's heart will expand as his horizons expand. You just looked up at the stars and the sea. I believe you can understand this feeling."

Yang Xian casually turned the globe model he made on the table and said with a smile: "I presented a world map to His Majesty before, but now our Majesty is very angry."

"Don't worry, Wei Guogong will definitely be fine. A king with a different surname will be indispensable when he comes back. Just wait and become the princess."

For Xu Da, a prince with a different surname meant nothing.

In the future, the Ming flag will be planted all over the world map, and there are still battles for Xu Da to fight.

Xu Miaoyun fixedly looked at the globe in Yang Xian's hand, looking at the several areas marked as different landmasses. In addition, more areas were an endless blue.

Yang Xian noticed Xu Miaoyun's gaze and said, "This is the world we live in, and I call it the earth."

"What are these blue parts?" Xu Miaoyun asked.

"It's the sea." Yang Xian explained.

"Three-quarters of our world is covered by sea water, and the other quarter is land."

Xu Miaoyun nodded. She was like a sponge tonight, crazily absorbing Yang Xian's experience and knowledge.

"Is our Daming here?"

Xu Miaoyun quickly found the area where Daming was located in an unusually conspicuous position on the globe.

Then she used Daming's position as a marker, looked down, and immediately saw a bug-like place on the side.

(End of this chapter)