Datang: Li Shimin begged me to rebel

Now that the matter has come to this point, it is impossible for them to object anyway, so they can only acquiesce in the current situation.

"Everyone, I will announce a few things today." After Li Ke went to court, he spoke directly without waiting for everyone to speak.

"Where is the Taishi Bureau of the Secretary's Province?" Li Ke asked.

"The minister is here." Li Chunfeng, who was standing behind, stood up.

"Come to Liangliangyi Hall later. I have a set of books on astronomy and calendar here, including some books on data calculation. You can take it back later, study it carefully, and then formulate a new set of calendars." Li Ke was very pleased A brand new order was issued directly.

"Yes!" Li Chunfeng was a little puzzled, but he bent down to salute immediately.Didn't His Highness say before that these need to be studied by themselves?Has His Highness already researched the new astronomical and calendar data at this time?

But what Li Chunfeng didn't know was that the change in Li Ke's thinking came from the information from Xizhou sent over before.

So Li Ke made changes, such as the calendar, Li Ke decided to change it directly with the change of the Tang Dynasty!From now on, directly take out the calendar of the Gregorian era in later generations.

The Gregorian era itself has nothing to do with the Western belief in Jesus Christ. What Li Ke is referring to is the Gregorian calendar, which is determined by the revolution of the sun.

After giving the finished product, I will tell Li Chunfeng how to calculate the ecliptic angle, revolution orbit and other calculation methods, and let them learn and comprehend by themselves.

The traditional lunar calendar is flawed. In fact, the calendar of the Tang Dynasty currently uses the "Wuyin Yuanli" created by Fu Renjun and Cui Shanwei. This calendar has been implemented for 46 years. That is to say, in fact, the ancient calendar The calendar is also changing all the time, and later this calendar was corrected by Li Chunfeng for mistakes and omissions.

It is undeniable that the lunar calendar in ancient China is a kind of cultural inheritance, but in fact until the Tang Dynasty, this calendar was not perfect. The lunar calendar, which was paralleled with the Gregorian calendar more than 1000 years later, is actually a yin-yang calendar. It was the Zijin calendar that began to be used in 1929. Throughout history, almost all dynasties have revised the calendar.

Therefore, the ancient calendar is not as thorough as the 1000-year-old lunar calendar. Li Ke made a choice after thinking twice.

Adopt the same double-calendar parallel method as later generations, since the Great Tang Dynasty has already used the Great Tang Era, then it is better to calculate directly according to the A.D. Era.

Solar terms such as 24 solar terms can be directly added to the Gregorian calendar. This is not a conflict, and the precise calculation method of the Gregorian calendar is also conducive to inheritance, while traditional festivals such as the Mid-Autumn Festival rely on the full version of the lunar calendar for later generations.

To put it bluntly, in this world, after the Gregorian calendar was adopted by Li Ke, even in the modern society more than 1000 years later, the whole world will have to admit that this is the Tang calendar!

Li Ke decided to take a two-pronged approach, and decided that the first year of the Gregorian calendar should not only be influenced by culture, but also by science and technology. Even if scientists study it more than 1000 years later, they will have to marvel. The ancestors of China are awesome, so early Discovered the Gregorian calendar with the earth revolving around the sun.

And it is also accurately calculated that one revolution is equal to 365 days, 5 hours, 48 ​​minutes and 46 seconds.

Li Ke plans to calculate the concept of hours, minutes and seconds, although the sexagesimal system of modern time actually comes from the ancient Semites in the 3rd century BC.

But who made Li Ke get used to it?Now that Li Ke is used to it, everyone should get used to it. As for the people of later generations, let them be amazed.

The later definition of time, for example, a second from the first pendulum, is later defined as an atomic second: the duration of 133 cycles of radiation corresponding to the transition between the two hyperfine energy levels of the ground state of the cesium 9,192,631,770 atom.

Because the atomic second is not affected by the environment, it is more accurate, and the atomic second is for scientific research.But the atomic second cannot get rid of the astronomical second.

It is not so accurate in daily use, but the time of later generations is related to the unit of measurement. For example, the length of the swing arm of the second pendulum is 1 meter.

It is not difficult for a craftsman to make a pendulum clock. With a pendulum clock, timekeeping is naturally more accurate. A pendulum clock that relies on gravity is naturally more accurate than the current timekeeping through the mainspring control.

Li Ke decided to introduce the Gregorian calendar first through Li Chunfeng and the others, and then improve the time and clocks. In the future, it would be a big deal to build a large clock tower in Chang'an City.

This thing tells the time for the people of the whole city, and more small pendulum clocks are built and adjusted together. In this way, the error will be gradually reduced.

Anyway, what time it is is definitely not as accurate as later generations through astronomical observation, but it doesn't matter, it is accurate enough for this era.

All these inventions in the future will be invented by me, Datang!

Let the scientists of later generations be shocked.

The research and development of astronomy is too slow, let them absorb and digest the results directly, and when the sandpaper and glass manufacturing technology is more advanced, they can take out the telescope and provide Li Chunfeng and the others with night sky watching Click Tools.

All in all, Li Ke is ready to recommend the Gregorian calendar, hours, minutes, and seconds.

Of course, please call this calendar the Great Tang Era in the future!Datang Gregorian Calendar!

"Minbu Shangshu." Li Ke said.

"Yes." Huangfulin stood up with a worried expression.

"After the meeting of the Ministry of Civil Affairs, we will investigate the distribution of pack horses and donkeys from the people all over the world. Horse mules bred from male donkeys and female horses are very suitable for processing and can replace farm cattle to a certain extent. All the relevant data have been investigated, and I checked the data of previous years before, which is very inaccurate.”

"In addition to folk data, I also need to give me an approximate statistics of the distribution of animal power in various provinces of the Tang Dynasty. I will try my best to find a way to bring a large number of pack horses from Xizhou, Xue Yantuo, and Western Turks into the country." Li Ke The order was issued directly.

"Yes..." Huang Fulin agreed with a bitter face, this work is too tiring.This is not an easy job, but who told the Ministry of Civil Affairs to do this.

"Shangshu of the Ministry of Industry." Li Ke said again.

"The minister is here." Duan Lun also stood up directly.

"The Ministry of Industry is in charge of the matter of farm farming, so you, the Ministry of Industry, are also responsible for the investigation of animal power. You should assist the Ministry of Civil Affairs in the joint investigation, and you should not push each other to speed up the efficiency. I want all the data before the end of this summer." Li Ke said with a cold face.

"Your Highness..." Duan Lun and Huang Fulin were startled, just one spring and summer?How can this be!

"Can it be done?" Li Ke directly interrupted their words and asked back.