Paris, France, Embassy of the Qing Dynasty in France.
"Come on, sit still and don't move! Very good, look here and smile! Cheese!"
"Crack!"
Yu Xunling pressed the shutter, and the images of Minister Yu Geng and his two beautiful daughters Yu Deling and Yu Rongling were left on the film.
As soon as Yu Geng stood up, his youngest daughter Rongling grabbed his arm: "Daddy, Daddy, let's take another photo!"
Yugeng touched her head and said, "If you want to shoot, just shoot with your sister."
The two sisters Yu Deling and Yu Rongling are only three years apart, and both are slim and graceful.
After spending their childhood in Wuhan, they followed Yu Geng on missions to various countries. They first stayed in Japan for three years, and then lived in France for four years. It can be said that they have been influenced by the entire West since childhood.
The two sisters each have their own characteristics:
My elder sister De Ling loves literature and art, and is very talented in languages. She can speak seven or eight foreign languages, and can create very skillfully in English and other foreign languages.
Roong Ling loves dancing and is a very talented dancer. She can not only dance Chinese classical dance, but also Japanese dance, Western modern dance, ballet, and is also very good at Greek dance, Spanish dance, etc.
Not to mention that girls nowadays love taking selfies. After the birth of photography, women fell crazily in love with this art of preserving beauty, especially beautiful girls like the Yu sisters.
Roong Ling pestered his sister De Ling and said to Yu Xunling behind the camera: "Brother, hurry up and take the photo!"
Yu Xunling also doted on his two sisters, "Okay, okay, let's strike a pose."
Just as he was about to press the shutter, De Ling interrupted him, "Wait a minute, I'm going to change clothes. I just bought a Cloche hat from the Champs Elysees today. It will definitely look good in photos."
Unexpectedly, after a while, when De Ling came out of the house, she not only put on a beautiful hat, but also changed into an elegant French dress.
"Come on, shoot!"
But my sister Rong Ling pouted: "Humph! No more filming."
"Why not take pictures?" De Ling asked.
"You went to buy new clothes and a new hat, why didn't you buy them for me?" Rongling said angrily.
De Ling hurriedly sat next to her, "Good sister, you are going to learn dance today. I was bored at home so I went out for a walk."
Yu Rongling is the only Chinese who has personally learned dance from Isadora Duncan, the originator of modern dancers, and received high praise from her.
Yu Rongling obviously didn't want to give up: "I don't care! I want it too!"
De Ling took off his hat and put it on her head, "Here, here it is for you."
"Really?"
"Sister, can I still lie to you?"
Roong Ling stood up and walked nimbly to the mirror. Looking at the beautiful hat, his mood immediately turned from cloudy to sunny, "Snap, snap, snap!"
While several people were taking pictures and playing, the embassy staff came in and found Yu Geng.
"Your Excellency, here is today's newspaper."
Yu Geng said: "How is it? Where is Mr. Bei Zi?"
The staff member replied: "The newspaper did not publish the news about Bei Ziye, but it reported about a person named Li Yu in the mission."
"Li Yu?" Yu Geng took the newspaper, "Is it the one who created some kind of ray before?"
"It's an X-ray, Sir Minister."
Yu Geng sat on the chair and read carefully for a while, then slowly put down the newspaper, "There is such a person!"
"Daddy, what's the news today?"
Roong Ling ran over with gentle steps. She had been practicing dancing all year round, and she was very graceful and graceful when she walked.
Rong Ling and Yu Xunling also came together. They were very concerned about the special mission led by Zai Zhen.
"See for yourselves."
De Ling was the fastest reader and asked in surprise: "Li Yu?" She remembered the name, "It turns out he is also in the mission."
They were all abroad and understood the current events very quickly. Li Yu shocked the entire academic circle some time ago, so they naturally saw the reports.
Yu Xunling ate a few grapes and said: "It's rare to have someone who understands Western learning. It's normal for Mr. Bei to bring him with him, but he really played a big game this time. The Royal Society in the UK is not an ordinary institution. Everyone must have it." genuine talent."
Yu Geng leaned back, "That's why I was a little surprised."
Rongling read the convoluted noun word by word: "Star A in Canis Major, what kind of star is this?"
De Ling corrected: "It's α. I don't understand the Greek. Although I don't know what it is specifically, it must be not simple for the president of the Royal Society to pay attention to it."
Roong Ling said: "Li Yu is so powerful, he must be an old scholar. How much knowledge does he have to know! I am so scared when I think about those numbers."
Minister Yu Geng said: "The newspaper said that he is a young man, only in his twenties."
"Are you in your twenties? Do you have any photos? Let me see." De Ling asked.
Chinese people in this era are used to seeing big politicians and great intellectuals, and talents in the scientific field are really refreshing.
Minister Yu Geng shook his head, "Not really. However, Mr. Bei's delegation will come to France, and we might be able to see him then."
"Really? That's great, I really want to meet him!"
"I hope it's not too ugly..."
Li Yu was very busy during this time. He lived directly at the observatory, observing at night and analyzing and calculating during the day. My little computer has been a big help. The solar panels on it are probably guaranteed to last twenty years.
Astronomy is not just a science of observation. The calculations required are very complex and cumbersome.
Tycho observed so much data back then, but found nothing. It was not until Kepler, who was good at mathematics, inherited his observatory that he really gave this pile of boring data real life, and Kepler's three laws were born. .
The most commonly used calculations in astronomy are logarithmic and trigonometric functions. When Napier invented the logarithm table, he was even praised by Laplace for "extending the life of astronomers."
However, although logarithm tables are relatively accurate, compared with calculators, they are really like multiplication tables.
As for trigonometric functions, not to mention, the sine function is often used in astronomical calculations, and the calculator can give the answer in a few seconds. At that time, it would take astronomers several days to calculate several sets of data!
It was the blessing of this little calculator that allowed Li Yu to make some "big news" in a short period of time.
What he wants to do is discover Pluto!
Although in Li Yu's era, Pluto had been removed from the list of nine planets and downgraded to a dwarf planet. But 100 years ago, the discovery of a planet in the solar system, especially a planet beyond Neptune, was an earth-shattering event.
But observing Pluto is not easy because it is too dim. And there are so many stars in the sky, how do you know where a certain star is? Astronomers at the time could only try and try again and again, sometimes with a bit of luck.
And there is a very contradictory problem, that is, the higher the magnification of the telescope, the more time it takes to discover stars. The reason is simple: the higher the multiple, the smaller the range you can see.
