Future library

In astronomy, the discovery of variable stars is extremely valuable. It is not an exaggeration to say that it opened a new chapter in astronomy.

The so-called variable stars are actually stars whose brightness changes with time. They are very common in the universe, and no one has noticed the way they change for a long time.

It was not until the beginning of the 20th century that a female astronomer, Henrietta Leavitt, was collecting data on various stars in order to make a detailed catalog. The variable star is brighter.

It sounds like a very ordinary discovery, but the result is that the secret she discovered is much more valuable than the stellar data she finally produced - in most cases, people do repetitive and arduous work that is worthless, often in In one moment, the work they accomplished was greater than in a lifetime.

The value of variable stars is that it allows people to calculate how far away we are from the planet at this moment by observing the brightness of a variable star for centuries - some people would say, don't we know its actual brightness? Actually don't know.

Imagine a car is approaching you at night. You will find that its headlights gradually become brighter - in fact, the brightness of its headlights does not change, but the car is getting closer and closer to you.

In astronomy, people call the brightness of the stars seen on the earth the apparent magnitude, and the true brightness of the stars the absolute magnitude. They are then connected with a simple formula, which is another From the linear equation of one variable, middle school students can directly obtain the distance.

Although it is so simple, how to obtain the absolute magnitude has puzzled astronomers for hundreds of years. At that time, they used the trigonometric parallax ranging method for stars in the Milky Way, but for extragalactic galaxies, because they were too far away, everyone was helpless for almost a hundred years, until Ms. Leavitt discovered the law of variable stars - by the way, This American female astronomer is a deaf-mute. When primary school students write essays about physical disabilities and strong ambitions, they get higher scores when using her name than using Zhang Haidi.

…

Cheng Jinzhou looked at the star map and faced the same problems as ordinary astronomers.

What he saw was the apparent magnitude, lacking an absolute magnitude to obtain an accurate distance.

Putting it into the law of universal gravitation and adding a rough mass, he could calculate the magnitude of gravity in almost astronomical units.

For the Star Warlocks, this is an absolutely impossible task.

Such a useful tool as the celestial ruler was not discovered until the beginning of the 20th century. In other words, the astrologers of the 17th century could not even think about it.

In Europe in the 17th century, gentlemen at that time didn't even have reflecting telescopes. Learning astronomy required just as much eyesight as learning to fly. The treatment of astrologers has been much better. At least they have the Star Array to use.

Although physics and astronomy are very similar, and astronomy electives are the focus of competition for children, Cheng Jinzhou, a doctor of theoretical physics, has never been a studious child. While comparing the brightness of stars, he Asked: What is the relationship between multiples of magnitude? I forgot, oh, I also need some optical instruments to measure the specific brightness of celestial objects.

The relationship between each magnitude is 2.512. Customer Service 010 finished: Do you know why I will tell you the answer directly instead of asking you to search in countless books?

You said you were training my conditioned reflex? Cheng Jinzhou didn't mind what kind of animal he was being compared to.

On the one hand. Customer Service 010 said coldly: We have talked about my problem before, so I will say a few more words now. I want you to know that my role is greater than the Star Alliance's books. , so I hope you can seriously consider my request.

Cheng Jinzhou had some expectations and withdrew his attention from the star map and said: In the short term, your existence is indeed more direct than the many, many books that may be useful or useless.

The words in the short term were spoken with great emphasis by him.

Customer Service 010 has new changes every day, especially the change in attitude. It is almost like changing from a state-owned waiter to a mall waiter who is on her period. Now it seems as if her period is about to end.

Although it is a bit inhumane, Cheng Jinzhou still hopes to squeeze it for a longer time, which can be regarded as a little compensation for his lost energy and physical strength.

I can directly tell you the brightness on my star map. Customer Service 010 did not explain any more.

That's the best. Cheng Jinzhou didn't feel guilty at all.

Customer Service 010 also laughed and said kindly: My patience is limited, I hope you can make a decision quickly.

Cheng Jinzhou smiled and said nothing.

After buying about 200 more books, he would be able to reach Covenant Level 4, but it was really difficult for him to decide when to reach it.

Seeing something happen to Customer Service 010 or the Star Alliance Library, he could only passively bear it - whether it was good or bad, Cheng Jinzhou naturally wanted to maintain the status quo.

For him, the status quo is already a very good situation.

Throughout the night, Cheng Jinzhou was constantly counting stars, changing stars, and connecting star lines.

The gentlemen who came to the banquet went back to their homes, and Bishop Kant seemed not to care at all about his actual purpose.

Even at the other end of the inner hall, Cheng Jinzhou could hear the howling song, which was extremely inspiring.

For such an off-line bishop, Cheng Jinzhou would rather be more prepared.

…

The warm spring light shines on the earth, and the biting cold wind blows Li Zhong's soul.

At Bishop Kant's strong request—in essence, the only request he repeated—all the tailors in the capital were gathered in the sanctuary, including His Majesty's royal tailors.

All kinds of clothing materials, or even materials not used for clothing, are piled up in the hall of the church, from silk and satin to cotton and linen, from felt blankets to cowhide and bear skin. The star warlock apprentices who specialize in purchasing for the church will even I searched all the shops in the capital. Girls who are planning to get married in the next half month must be very lucky if they want to choose good fabrics.

Cheng Jinzhou, who had not slept for 24 hours, had difficulty falling asleep amidst the bustling noise. Coupled with his uncontrollable curiosity, he couldn't help but take a walk to the north of the inner hall.

However, he soon regretted this decision.

In the side hall separated by several Roman-style columns, Kant raised his upper body and waved his thin arms to direct a team of up to a hundred tailors.

I saw that he was wearing a pair of white Tang suit shorts with blue flowers and red, and his big black leather shoes were polished again. The huge toes covered his ankles. The most intoxicating thing was a mixed-color cloth belt, entangled It was like a tattered rag, and a third of it was still wrapped around the rib-like chest and waist.

Cheng Jinzhou's first thought was: What the hell kind of animal is this?

Bishop Kant was always uplifting and happy, always full of energy and using encouraging words. He was like an African-American monkey candidate who was running for president of the United States. He was wandering around the only open space in the hall that was not covered with cloth, shouting: Hurry up, hurry up, hurry up, you are fighting for the great Kant. Bishop serves. Serving him means serving the Holy Church. Serving the Holy Church means serving the Star God. The Star God will thank you and the Star God will repay you. Think about it, you are doing the most beautiful thing in your life. Kant's clothes will make the whole world tremble and ecstasy...

While Li Zhong endured the carpet bombing from the Lord Bishop, he lowered his head and moved his legs back until he was at the entrance of the temple, and then he let out a soft whoop.

It's very hard. Cheng Jinzhou suddenly said, startling the priest.

Li Zhong shivered due to paralysis, and turned around and said, Mr. Cheng, why are you here? Did you sleep well last night?

Didn't sleep much. You said he came from Xingzhou Temple. Xingzhou Temple is like the Star Warlock Association's status in the association, right?

Yes. Li Zhong sighed and said: Xingzhou Holy Church is the core of the Holy Religion, the heart of the Holy Religion. Everyone who wants to become a priest must have studied in the Xingzhou Holy Religion. I was It took two years of walking to reach Xingzhou, and another four years to get from Xingzhou to Daxia.

Are all the people there like this? Cheng Jinzhou murmured. Bishop Kant was still instructing the tailors on how to make clothes he was satisfied with. Within a few minutes, he put on another work jacket. As usual, it had double-branded large buttons, which were eye-catching. Deep V-neck. Of course, underneath the jacket, he was still naked.

Father Li Zhong patted his forehead in shame and said, No, I have never seen anyone like Bishop Kant. Most bishops are, you know, very serious and cautious people.

I believe most pastors and priests are also serious and serious people.

Of course, it must be. Li Zhong was happy that Cheng Jinzhou had returned from his lost way.

Cheng Jinzhou pouted and said, He was probably kicked out.

What?

He was driven out. We feel perverted when we see this kind of animal. Those old people in the church may not be able to eat it anymore. Cheng Jinzhou was an unscrupulous commentator. He was not afraid of Father Li Zhong at all.

As the senior person in charge of the local church, Li Zhong could not do whatever he wanted like Cheng Jinzhou. He only nodded slightly and said: In short, his report is still valuable. If it is determined that you are the favored one by God, you will be granted An unexpected benefit.”

For example?

Develop the resources and manpower of the local church. Li Zhong raised his eyebrows. Developing Daxia was naturally his dream. He needed to give the Temple a reason.

Cheng Jinzhou laughed twice, and just as he was about to say something, his body started to move involuntarily.

Bishop Kant was still waving his arms, pulling Cheng Jinzhou in and shouting: Oh, you are the lovely one favored by God, let uncle help you look at the star map.

…