All Heavens Dragon System

This is a yard with two entrances. On the second floor attic in the backyard, the window is open. A young girl is holding a binoculars to observe the moon. This scene surprised Shen Long. Hey, there are girls who love astronomy in Daqing?

So he stopped and sat on the roof not far away watching in silence. When the girl observed for a while, he put down the binoculars and recorded something on the paper. Shen Long was curious for a while and couldn't help hiding her figure. Take a peek in the past.

　　 "Strange, from the telescope, the moon is a complete spherical shape, so why is there a lunar eclipse again?" She thought about it, went back to the house, and began to take out various tools to demonstrate.

She put the crystal lamp on the table in the room suspended on the beams of the room as the sun, and the small round table was put down under the lamp as the earth, holding a mirror in her hand as the moon, while moving and experimenting repeatedly, she kept observing the sun. , The position of the moon and the earth and their relationship. When the mirror was blocked by a small round table and shadows appeared on it, she suddenly realized.

"I understand that the moon shines by reflecting the sun's light. Whenever the light travels in a straight line, and the sun is blocked by the earth and cannot go forward, it will form a dark shadow on its back, across the sky, so shadows appear on the moon. !"

Amazing. Although Zhang Heng discovered part of the principle of a lunar eclipse as early as in the Han Dynasty, he believed that the earth walked in front of the moon and blocked the sun’s light. It is called the dark emptiness, where the stars are the stars, and the moon is the lunar eclipse."

In the West, when Columbus arrived in the American continent, he also used the principle of lunar eclipse to intimidate the local natives. However, in the Qing Dynasty, another woman was able to judge the cause of the lunar eclipse through her own research. This is really too great. It's rare.

"Since the lunar eclipse is caused by the earth blocking the daylight, not a tengu swallowing the moon, then the frequency and time of the lunar eclipse should be calculated? But how should it be calculated?" The girl returned to the round table and sat down and took it. The pen and paper began to count, and after wasting a few sheets of paper, she sighed again, "Hey, it's a pity that Western astronomy books are really hard to find. It would be nice to find a few books on this subject."

"Lunar eclipse calculations are not limited to Western talents. In the Han Dynasty, Liu Hong had a method for calculating the limit of lunar eclipse in "Dianxiangli", and Cao Wei Yangwei's "Jingchuli" has a method for calculating eclipse points, Liu Song He Chengtian" In Yuan Jiali, there is a saying, “Showang is going to be divided into less than a composite number... Hope is a lunar eclipse.” Liu Song Zu Chongzhi’s "Daming Calendar" predicted that the solar eclipse and lunar eclipse are very close to reality..." Shen Long couldn't hold back for a while I spoke.

An average girl would be shocked to hear someone talking to herself outside the window in the middle of the night, but this one was excited, "I have read all these books, but the algorithms in the books are too cumbersome. , And it’s too crude. Is there a simpler calculation method?"

　　 "Simple algorithms are also available, but you have to use Western mathematics! But you can't make it clear in a moment!" Shen Long showed his figure, sitting on the roof next to the attic window.

　　 "This Daoist, please borrow the book, the little girl is grateful!" The woman walked to the window and said to Shen Longfu Yifu, her eyes full of desire for knowledge, but not much fear.

"There was an astronomer named Kepler in Tessie. He observed the sky for many years and summed up the three laws of planetary motion. One of them is the law of ellipse: all planets orbit around the sun are elliptical, and the sun is in an ellipse. The second is about the law of area, the area that the line between the planet and the sun sweeps in equal time intervals is the same; the law of the three-pass harmonic: the square of the time of all planets around the sun and the semi-major axis of their orbit Proportional to the cube."

"Also authored "Mysteries of the Universe", "Optical Needs of Astronomy", "Rising Stars at the Foot of Ophiuchus", "New Astronomy", "Refractive Optics", "Harmony of the World", "Summary of Copernicus Astronomy" If you are interested, I can send it to you tomorrow!" Shen Long said, he has a lot of astronomical materials, but later generations are too deep for this girl Now, it's just right to bring Kepler's work over.

"Thank you to the Taoist leader, the little girl has nothing to do with her. I ask the Taoist leader to accept these as the cost of borrowing the books. The little girl will definitely keep these books and dare not damage them at all." The girl He quickly took out his jewelry box and handed it to Shen Long with both hands.

　　 "But it is not necessary. It is rare to meet such a studious person. What is it to borrow a few books? Tomorrow, at this time, you are here waiting." After that, Shen Long disappeared into the darkness after a few leaps.

　　 The woman silently looked at the direction where he disappeared, and then muttered after a long time, "Is this a swordsman-like stranger in "The Legend of Tang Dynasty"? Why does he know so much about astronomy?"

Shen Long originally went northward the next day, but he met such a funny girl, so he stopped in Jiangning. After UU woke up in the morning, he went to the nearby area to find out and figured out this. The identity of the woman.

It turned out that this girl was called Wang Zhenyi, the daughter of the scholar Wang Xichen, and the granddaughter of the prefect of Xuanhua. She used to go through Chu and Yue with her father and eunuch, and went out of the province to watch. , And more literary talent.

If such a girl is put in later generations, even in the Tang and Song dynasties, she will definitely be the object of pursuit. However, at this time, people regard her as a different kind. The daughters of the court officials and eunuchs are 18 or 9 years old, and even come to the door There are no beggers.

　　 But people don't care. They either read in the grandfather's study or observe the starry sky in the yard all day long, and they are also enjoying themselves.

Hey, this one is very famous in later generations. On February 8, 2000, the Beijing Observatory discovered an asteroid, and the International Astronomical Union named it after an ancient Chinese person-Wang zhenyi (王振仪). Once selected into the most authoritative scientific academic journal "Nature", it was written in the story of "50 Outstanding Women Scientists Who Changed the World". There is also a crater named after her on Venus.

　　 It’s just that this one should be born ten years later, why is it early? Probably because the world is not rigorous enough? This would be better. I thought that the girls in the world of "Han Zhu Ge Ge" were all crazy, and none of them wanted to provoke them. I didn't expect to encounter such a strange girl.

　　 Well, I want this girl, she is much better than Ziwei, Qinger, Xiangxiang!

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