Lu Zian actually demonstrated thousands of astrological signs with this morning light alone!

The sun rises, the sun sets.

As the light flowed, all the jade balls reflected the light of the largest jade ball in turn.

They fall on the observatory, and the light and shadow clearly point to each interval.

The clear wind in the morning made Lu Zi'an's mind clearer: "This is a gui table. It is a tool used to measure the length of the sun shadow. It can measure the length of the sun shadow at noon to determine the season, the year of return or the year of the solar calendar. The one who is established is a table, it can produce shadows, and the one who is horizontal is a gui, which is a scale used to measure the length of the shadow... The accuracy of the gui table when measuring is proportional to the length of the table."

At the same time, the light fell on Yugui, and Lu Zian pointed to this clear light and shadow: "This is what the sundial (gui) originally looked like."

There are eight types of sundials: horizontal sundials, equatorial sundials, polar sundials, and southward vertical sundials.

The most common one is naturally a horizontal sundial, which uses a horizontal dial, and the inclination of the sundial axis is set according to the latitude of the ground.

"But... I personally think that the timekeeping equipment of the ancients should be a slit rather than a sundial." Lu Zian frowned slightly and thought, operating the jade ball to make a new change: "In "History of Ming Dynasty: Li Yi", it says: The art of timing is that the pot leak is an ancient clock, which is a new method. However, it is better to seek to be connected to the sun and star. The day is used for the day and the night is used for one star. For example, the time of a incense stick is to time it is determined by the burning of incense, and there are also incense leaks, field leaks, etc.."

So that's the case? Everyone was thinking.

Some professionals who know the details of history have also begun to get ready to discuss this statement in depth.

But soon their thoughts were transferred to other aspects by Lu Zi'an, because Lu Zi'an smiled and said, "I believe everyone has seen it. The prototype of this observatory is Dengfeng Observatory, also known as Zhou Gong Beta Film Station, and the scientific name is "Eight Foot Table", which means that the length of the watch on Dengfeng Observatory is eight feet long. The record of "The sun is five inches at the scene of the sun" in "The Book of Zhou" means that at noon on the summer solstice of Dengfeng in the center of the world, the shadow length of the eight feet is exactly one foot and five inches.

Commonly known as "Wangwutai". If you come to the observatory on the summer solstice, you will find that you have no shadow when you stand on the stage."

【Is it so magical?】

[Wow... I was very interested! I just don’t know how much it costs to go there once.]

【It feels so amazing, it must be very expensive...】

[Students sighed and felt awesome in their pockets!]

[Kill Yingying Dang with one punch. I have been to Dengfeng Observatory. The ticket is ten yuan, and it is very conscientious. OK? You told me that you don’t have ten yuan?]

[...I'm so cheap? I'm going to see it next summer solstice! It feels super amazing!]

[I'll go too, I'll go too! Why don't we form a group!]

【This can have!】

Seeing that the barrage was becoming more and more focused, Lu Zi'an could only smile and bring it back: "The Dengfeng Star Observatory was built around 1279 and consisted of the platform body and the measuring ruler. The platform body was shaped like a bucket-shaped body, and its function was "the sun shadow is sun, and the pole stars are watched at night, and the morning and night are facing the morning and night." The Zhou Li records that during the Western Zhou Dynasty, Ji Dan, the Duke of Zhou, built a Tu Guimu table in Yangcheng, and "immediately", measured the sun shadow and determined the twenty-four solar terms to guide farming. This is the origin of the twenty-four solar terms."

It was bright and the slight morning wind blew up the corners of his clothes and stroked his eyebrows.

Lu Zian, who had not slept all night, looked a little haggard, but his eyes were still filled with dazzling light.

When he was excited, he even sat down at the table and talked to netizens about Guo Shoujing.

This is a very talented astronomer, mathematician, and water conservancy engineering expert, known as "Taishi Guo".

Since the 13th year of Zhiyuan (1276), he was ordered to revise the new calendar. It took four years. He referred to more than a thousand years astronomical materials and more than 70 calendars to formulate the "Time Calendar", which became the most advanced calendar in the world at that time.

Since its promulgation, the "Shi Shi Calendar" has been used for more than 300 years and is the longest popular calendar in my country.

In order to revise the calendar, Guo Shoujing also restructured and invented twelve new instruments: simple instrument, high table, quasi-face instrument, celestial instrument, celestial instrument, celestial instrument, celestial instrument, twelve new instruments: simple instrument, high table, celestial instrument, lunar eclipse instrument, and star sundial timing instrument.

All in all, this is a wizard.

When Lu Zian talks about this Grand Historian Guo, he is really a good person.

Even if you get those wonderful instruments now, they can’t help but sigh at their meticulousness.

In order to make everyone understand more intuitively, Lu Zian opened his record book, which included drawings of these instruments.

It is clearer and easier to understand than printed ones.

【It feels so amazing, Master Lu, can you make them again?】

【Yes, I feel that these are so exquisite...】

Lu Zian raised his eyebrows and smiled: "If everyone is interested, I will leave these instruments as homework for the registered disciples of Baigongmen. You can come to Changyan to watch it."

Everyone laughed, only the famous disciples of Baigongmen Sect Feng Zhonglang: Are they hallucinating? Why do they still have homework?

Someone called Lu Ahui immediately and completely forgot what time it was now.

But Lu Ahui was also standing in front of the computer, and then answered: "You'd better have a suitable reason."

Dare to disturb him watching Master’s live broadcast, it’s like a mouse licking the cat’s nose and seeking death!

"Senior Brother Lu, is what Master Lu said true? Why do you have homework??"

Lu Ahui was happy as soon as she heard this. It turned out that she was a little fool who was frightened. She was very happy, but her voice was still serious: "Of course it's true."

“…”

"Before, it was to let you get familiar with various craftsmanship faster. If your skills do not meet the standards, you will naturally not leave homework. Now the temperature is similar, so of course you have to do homework."

"..." Why does it feel like you are returning to high school?

"We were the same before. We still needed to take the exam. The top three were promoted, but those who failed..."

"So scary..." The legs were shaking, and the voice was trembling. MMP, I was so panicked!

Lu Ahui teased for a while and felt that he was about to become a coward, so he quickly comforted Mao.

Why is this new junior brother so cute?

He hung up the phone with a smile on his lips and continued to watch the live broadcast.

The display of Dengfeng Observatory has been completed, and Lu Zian just stood up.

I reached out and pulled out a few jade pieces. The outline on the outside remained unchanged, but the observatory inside had changed.

It was like fiddling with a Rubik's Cube, and the squares were switched and the observatory sank and thirteen jade pillars rose up.

The Taosi Ancient Observatory was revealed again. Lu Zi'an's old example showed everyone, and finally the name of the work was said: "This is... "The Repetition".

The sun and the moon are vigorous, the stars are used to measure the principles, the yin and yang and the five elements are repeated.

As he said, the Sun Shadow changed the next round of changes in the light ball, stunned a lot of viewers in the live broadcast room.

After the demonstration, Lu Zian also began to feel a little sleepy and yawned: "Okay, that's all for today, let's take a break."

【Good night, oh, no, good morning!】

[Thank you for giving us this gift, it's really beautiful.]

【Can you sleep with me? My bed warming is great!】

Then there were difficult words, such as "dance of guns and sticks", such as "bloody swearing", such as "close attacks and long-distance friendship", which made everyone laugh: the live broadcast room was full of joy.

Lu Zi'an turned off the computer, and just cleaned up the things on the desk for a while, then went back to the room to wash.

After taking a hot shower, I felt comfortable all over and fell asleep while touching the pillow.

As a result, there was always someone who didn't give him a good sleep. After less than three hours of sleep, Zou Kai came over to knock on his door.

Lu Zian was very self-controlled, otherwise he would just take a slipper to the horizon with his slippers when Zou Kai knocked on the first time.

He narrowed his eyes slightly and said in a hoarse voice: "You'd better have a reasonable reason."

"Jin Yutong is here." Zou Kai had a rare serious expression.

Jin Yutong? Who is this? I lack sleep, and Lu Zi'an's thinking is a little stagnant.

Zou Kaisui added: "The last time, the one who was shameless and said he wanted to adopt Qiqi. The woman who was driven away later, she brought a lot of reporters in the museum and said she wanted to untie the Linglong Tower on the spot."
Chapter completed!