Chapter 90: Belin

Zhu Qizhen had heard Yang Shiqi say that Bei Lin was young and promising, but in his mind, no matter how young he was, a person who was proficient in the astronomical calendar would not be too young.

But Belin was too young, she looked like she was in her twenties, and her face was white.

That's it.

Zhu Qizhen still trusts Yang Shiqi.

But Belin's performance also disappointed Zhu Qizhen, and before he could say a word, this great astronomer was already sweating and trembling.

But Zhu Qizhen had doubts in his heart, so he always had to ask clearly, and ordered Bei Lin to sit left and right, and casually praised: "Today's auspicious day for Qintian's election is good, and Qing is meritorious." ”

"The minister didn't dare to take credit, and the auspicious day of the wedding was set by Huang Jianzheng. The minister did not dare to take credit. Belin said cautiously.

Zhu Qizhen didn't know what to say for a while.

This Huang Jianzheng is the unlucky guy who committed suicide.

Zhu Qizhen didn't go around the bush anymore, and asked directly: "What is the difference between the "Great Unification Calendar" of my dynasty and the "Time Granting Calendar" of the previous dynasty?" ”

When asked about the professional field, Bei Lin's spirit was obviously shocked, and said: "In the seventeenth year of Hongwu, Qin Tianjian engraved Dr. Yuan Tong to write to the imperial court to repair the calendar, and Taizu allowed it. It's just that the "Time Calendar" is exquisite, and it is the culmination of ancient and modern. The corners of Bei Lin's mouth showed a hint of sneer, and said: "Yuan Tongzhi and Guo Shoujing are even more worlds apart. Yuan Tong revised the "Chronological Calendar", but reversed the order, streamlined the algorithm, and did nothing else. ”

"I also did a wrong thing and eliminated the growth and decline of the years."

Zhu Qizhen asked, "How old do you grow?" ”

When Belin heard Zhu Qizhen's question, she became even more excited, completely forgetting that it was the emperor in front of her. As soon as he opened his mouth, he gushed endlessly, and he talked about the four words of years and years, and talked about a big lesson.

Zhu Qizhen soon regretted it.

Because it's so professional.

Although Zhu Qizhen has read a lot of four books and five classics, in general, he is still a layman to the astronomical calendar, and the ancient Chinese astronomical calendar in later generations was defeated by the Western calendar, and many special terms of the ancient calendar have become dead words.

Zhu Qizhen didn't understand at all.

Fortunately, Zhu Qizhen is not bad at geography, and he still understands the relationship between the planets in the solar system, and finally understands what the so-called surplus of years is.

The so-called calendar is a summary of past astronomical data and a mathematical model for the estimation of future astronomical phenomena.

Guo Shoujing believes that the time of each solar year is different, and there are errors in it. In the future, this error will be eliminated, so in the calculation, a value should be added as a balance.

This statement does not seem to have been put forward by Guo Shoujing, but is just a kind of inheritance.

But Yuan Tong looked at Guo Shoujing's math problem, and it seemed that he couldn't change it, so he started with this inconspicuous number.

Zhu Qizhen understood very well why he wanted to change the calendar, because in the seventeenth year of Hongwu, even Yunnan was pacified, the territory of the Ming Dynasty was basically laid, and Emperor Taizu's mind also shifted from conquest to governance.

At this time, the dignified Ming Dynasty still used the calendar of the Yuan Dynasty, which was absolutely impossible.

After all, the calendar is very important politically, and it must be changed, and it must be changed, which has nothing to do with whether the "Calendar of Hours" is allowed or not.

However, if a poor student is asked to change the homework of the top student, it will inevitably cause problems.

Zhu Qizhen figured this out, and wanted to ask any more professional questions, interlaced like a mountain, Zhu Qizhen didn't want to study what the problems of the "Great Unification Calendar" were. He just wanted to know the results. Don't want to know the details.

However, at this moment, he also believed in Yang Shiqi's vision.

The Belin in front of him may have such and such shortcomings, let him organize a thing, he will definitely not be able to do it, but in the field of astronomical calendar, there is a kind of fanaticism.

It couldn't be more suitable to serve as the Qin Heavenly Supervisor.

Because it is simple, it is far away from politics. He will not casually use celestial phenomena to warn the king, because of fanaticism, he is also accomplished in astronomy.

Qin Tianjian is also a very simple yamen, with his support, Belin can naturally sit firmly.

Zhu Qizhen's words interrupted Belin's endless talk and said, "Then why is the solar eclipse inaccurate?" ”

For a moment, Belin was stunned for a moment, muttered for a while, and began to talk endlessly.

Zhu Qizhen secretly regretted in his heart that I asked the wrong question. It shouldn't be asked.

Belin explained in great detail the mistake of Huang Jianzheng, and explained the difference between the methods of verifying solar eclipses in the "Great Unified Calendar" and the "Hijri Calendar" and their two calendars, and believed that Huang Jianzheng was checking a few numbers when he cited the data incorrectly.

Because all the parameters in the "Great Unification Calendar" are the results of Guo Shoujing's measurements in the four seas, it is difficult to change them now.

Hearing the end, Zhu Qizhen finally understood one thing, he shouldn't ask about the solar eclipse.

Why?

Because in the ancient calendar, verifying a solar eclipse was one of the highest problems in the astronomical calendar. It's as if Goldbach had guessed it in mathematics.

And Belin is also a scholar who has a fanatical love for the astronomical calendar.

This question is simply scratching the itch, for a question that seems ordinary to outsiders, Belin can elaborate on this question for three days and three nights, without repeating it.

Zhu Qizhen immediately interrupted Belin's gushing. said: "And today's floods and droughts are incommon, is there a mistake in the calendar?" ”

Zhu Qizhen also has experience, and asked Belin to ask true/false questions.

"Your Majesty." Belin said indignantly: "My "Great Unification Calendar" is not without problems, after all, it has been used for more than a hundred years, and it has been a long time, and there are many errors accumulated, and it is inevitable that there will be some problems, but it is not even connected

The four seasons are divided, and it's also wrong. ”

Zhu Qizhen secretly said in his heart: "That's fine." ”

Historically, the "Great Unification Calendar" took more than 200 years, and it was only during the Chongzhen period that the calendar was repaired, and then the "Great Unification Calendar" has always had the problem of inaccurate measurement of solar eclipses, and there were such and such problems in the later period. But overall, it's still usable.

Otherwise, it wouldn't have taken more than 200 years.

The longer the calendar is used, the greater the error. Therefore, in Zhu Qizhen, at this time, the Great Unification Calendar is only a small problem.

Zhu Qizhen said: "Do you think the "Great Unification Calendar" needs to be repaired? ”

Belin said: "If the imperial court is willing to cultivate, it is naturally the best, but the ministers are worried, and the imperial court does not dare to give up the money." ”

Zhu Qizhen was a little strange for a while, and asked, "How can it cost a lot of money to repair the calendar?" ”

In Zhu Qizhen's view, the astronomical calendar is a problem. It's just a math problem.

Mathematics is the least expensive of all subjects, and it is nothing more than summoning some scholars and asking them to hold a meeting in Qintianjian, how much money can it cost.

Belin said: "If it's tinkering, in fact, the imperial court does it every year. Every year the Qin Tianjian promulgated the calendar, he revised the previous calendar. It's just that all the many star positions in the "Great Unification Calendar" are the data measured by Guo Shoujing Sihai. Nowadays, only the north and south capitals have astronomical observatories, and if the data of the two capitals are the foundation, they can only be repaired and repaired. ”

"It's not useful at all."

Zhu Qizhen couldn't help but sigh in his heart, many times there is a powerful country behind any advanced technological achievements.

Now Zhu Qizhen has to admit that the Yuan Dynasty can do the measurement of the four seas, but now the Ming Dynasty may not be able to do it.

When Guo Shoujing was revising the "Calendar of Time", the large-scale astronomical observation from the west to Central Asia, the North Sea in the north, and the South China Sea in the south was almost unprecedented.

Only with such a large amount of accumulated data can there be a "Time Calendar".

It's like the previous revision of the "Time Calendar" by Yuan Tong, without such a large-scale measurement, without this foundation, it is like a tree without roots, and can only be repaired and pruned in the details, and on top of the algorithm, make a little article.

It is simply impossible to make a calendar that goes beyond the Chronological Calendar.

Even if the current Ming Dynasty and Zhu Qizhen can establish an observatory in the northeast and the old port, it is beyond the reach of the Western Regions and Central Asia.

But Zhu Qizhen was not reconciled to this.

First, he was unwilling, and the Ming Dynasty was not as good as the Yuan Dynasty. Second, I don't want to be surpassed by Westerners on the commanding heights of the astronomical calendar.

You must know that the Chongzhen calendar, which is the model of our current lunar calendar, is so accurate, but there are a large number of Western astronomical achievements.

Zhu Qizhen's heart is not only on the astronomical calendar, but also on other aspects. A lot of things are related, and they affect the whole body. What Zhu Qizhen values is the whole body.