Zhao Huan looked at the bright moon coming out of the east, and sighed deeply, the Great Song Dynasty finally took a step forward under his leadership and on the basis of the Han and Tang Dynasties.

At least Galileo was not the first to be able to see that the moon was a ball.

Zhao Huan adjusted the huge clairvoyant mirror, and it was no longer appropriate to call it a clairvoyant mirror at this time.

This instrument was made under the guidance of Zhao Huan, and it took a whole year to do it.

The clairvoyance of the Royal Observatory in Bianjing is composed of two mirror tubes, one is called the finderscope, and the purpose of this finderscope is to point the huge telescope at the stars that need to be observed.

The two officials of the Qin Heavenly Prison were slowly turning the chassis of the telescope, while the other young eunuch of the Qin Heavenly Prison was looking for the figure of the moon in the night sky in the star finderscope.

The horizon of the clairvoyant mirror is still too narrow.

"Three points from the left, two points from the right. Okay, don't use it, the grapeau and weft calibration! The young eunuch of Qin Tianjian shouted loudly.

Another officer carefully stirred the disc, which was a coarse collimating spiral on the scope to adjust the focal length.

The young eunuch's eyes were on the observation glass, and he shouted loudly: "Three and a half weeks left." Change the fine quasi-coke, five and a half weeks on the right! Okay, rewind slowly! Stop! Official, that's right. ”

Zhao Huan sat on the stool, waited for the young eunuch to focus on the moon, stood up, and walked into the observation glass.

Today is the Shangyuan Festival, the moon on the fifteenth day is round enough, standing on the top of the mountain, you can see the moon like a silver disk embedded in the deep blue sky, sprinkling a piece of silver light, and the moon is covered with a faint halo.

This full moon is soft and soft.

The light clouds are as light as silk, surrounded by the bright moon rising, and the clear light reflects the surrounding into a round of colored apertures, deep and shallow, if there is nothing.

This halo is a halo, from the inside to the outside, from red to purple.

"Red, orange, yellow, green, blue, blue, purple, who holds the color to practice dancing in the air." Zhao Huan muttered to himself and looked at the rainbow-like moon halo and said.

Zhu Lian's eyes couldn't stop being surprised, this sentence made her amazing!

"Official, where does this sentence come from?" Zhu Lian asked while holding Zhao Huan.

Zhao Huan wiped the beads of sweat from his forehead and said, "The quatrain that I got occasionally." Occasionally. ”

"Probably rain tomorrow?" Zhao Huan hurriedly diverted the topic and said.

The moon is dizzy and windy, and the foundation is moist and rainy.

[Weather forecast: The temperature in Bianjing tomorrow will be -7 °C to -3 °C, cloudy to light snow, and the ultraviolet intensity will be weak, suitable for travel. 】

Zhao Huan came to the observation mirror in three steps and two steps, and the skill of diverting the topic was still a little shallow for Zhao Huan.

"Where is the rain in winter?" Zhu Lian followed Zhao Huan to the observation platform.

Zhao Huan looked at the moon in his eyes, and looked at it again unconvinced, only to confirm that he was right......

The telescope in the mirror is indeed a ball.

There's no doubt about it, but there's something wrong with the color.

The moon in the clairvoyant mirror is a red moon!

This made Zhao Huan shocked, looked up at the moon that was emitting a bright yellow light, and looked down again, it was still a red ball, floating in the deep sky.

Because of the horizon, this red ball is still moving slowly in the sky!

Damn! Did it suddenly become a supernatural?

What's wrong with this?

Zhao Huan took out the notebook from his sleeve, it was indeed modeled after Galileo's astronomical telescope!

Could it be that the moon of the Great Song Dynasty is red?!

Things get magical!

After Zhao Huan finished the observation, his face became cloudy, and Zhu Lian also glanced at it curiously, and he was also frightened!

A red ball suddenly appeared in front of him, fluttering non-stop.

"Go get the other one!" Zhao Huan shouted loudly!

Something went wrong!

Observing the moon and determining that the celestial bodies are all spheres, how can there be such a thing as a red moon?!

Another slightly smaller clairvoyant, about three and a half feet long, was lifted.

At this time, the officials of Qin Tianjian handed over the telescope to Zhao Huan for observation after adjusting the angle.

Zhao Huan looked inside, and the moon in this mirror was actually green!

He was confused.

Will this moon change color?

Isn't this Da Song the Da Song in my impression?

The young eunuch of Qin Tianjian glanced through the lens, and he didn't dare to look at it.

Everyone knows what the red moon represents, and it's a bad omen!

But the official family is a rare Ming monarch in the Great Song Dynasty, and he took the Great Song Dynasty to recover the monarchs of the sixteen states of Yanyun, is this all a bad omen?

The green color of the other clairfront mirror has obviously become even more weird!

"There's another one!" The young eunuch of Qin Tianjian used a speed no less than Zhao Ying running, panting and bringing another clairvoyant scope, and after adjusting the angle, Zhao Huan glanced at it.

This time it's purple......

This made Zhao Huan feel a little furious in his heart, what kind of trouble is this!

You have nothing to do in the moonlight mid-year festival, what color does it change!

It was obviously a moon with a bright yellow moonlight, but if the observation was a black rock, it would be in line with his usual impression.

Why did you make this astronomical telescope like this?

Su Xi is the main person in charge of supervising the three astronomical telescopes, and he was a little frightened when he saw the three colors of the moon in the lens.

"Officials, ministers... I thought it was because there were some impurities in the fired glass of this lens. "Su Xian must give an explanation to the official family.

Otherwise, the discolored moon in this shot will be put in the hands of someone with a heart, and it will be ironclad evidence of attacking the official's family!

Zhao Huan looked at the notebook in his hand, he flipped through it for a long time, and then he realized that the discoloration caused by the impurities in the fired lenses that Su Xi said was only one of the reasons.

The main thing is that something is wrong with the structure.

Due to the use of a single lens as the objective, there is a significant chromatic aberration.

If you want to get a good observation effect, you need to use a lens with a very small curvature, which will inevitably lead to the lengthening of the mirror body.

So from Galileo to Kepler, for a long time, astronomers dreamed of making longer telescopes.

This is also the reason why the moon in the horizon repeatedly changes color.

Chromatic aberration.

It wasn't until Duron studied the refraction and dispersion of glass and water, laid the theoretical foundation for achromatic lenses, and made achromatic lenses out of flint glass, that they would not be so magical.

It's not the science that's wrong, it's the technology of the Great Song that has the problem.

"There is still a long way to go!" Zhao Huan patted Su Xian and said.

He drew the shape of a prism, and next year he had to let Su take him to study the refractive index, otherwise this lens would always be this strange moon with different colors.

"Let's use these observations for now. Let's take a look at the stars first. Zhao Huan motioned to Qin Tianjian not to think about the color problem.

When Zhao Huan left the observatory, Li Gang instructed the young eunuch of Qin Tianjian that the matter of the moon changing color must not be spread outside.

In response to Li Gang's instructions, the young eunuch of Qin Tianjian nodded again and again. Observation is still required, but the color can only be left blank for the time being.

Zhao Huan left the observatory, and the streets of Bianjing, which were full of lights, were lit up in the night when the moon was high, and thousands of lanterns rose into the sky, floating over the entire Bianjing City.

That's the people put the lantern.

Every year, there are quite a few fires, and every year on this day, the officers and men cannot rest.

Zhu Lian looked at the colorful lanterns in the sky and was also full of love, she remembered the poem "Qingyu Case Yuan Xi" given to her by Zhao Huan last year, which has now spread all over the Great Song Dynasty.

Zhu Lian pointed to the big lamp in front of him and said, "Official, look, Aoshan is a high lamp!" ”

Aoshan high lantern, is the largest lantern in the whole lantern festival, 16 zhang long, 265 steps wide, there are two Aozhu pillars in the middle to support, like a giant dragon cruising on the lantern festival.

Zhao Huan didn't plan to leave the car, if he went down, the inspectors of the Imperial City Division could only clean up the entire street, otherwise the emperor's safety would be a problem.

Because he could only stay in the car and watch the lively lantern festival from afar.

Happy with the people, he thought, but the reality is that he can only watch from such a distance.

Zhu Lian had already known that she was coming this time, and she couldn't get out of the car, she could only watch from a distance and not up close, but she still couldn't stop her interest.

She looked at the person who was surrounded by people in the distance and said loudly: "That's Li Shaoyin!" ”

Zhao Huan nodded, Li Ruoshui, Shaoyin of Kaifeng Mansion, every year when the Shangyuan Lantern Festival is held, he will bring the "red envelope" issued to him by the emperor, which contains a silver dollar worth of money, which is specially issued to all the small traders of the Shangyuan Lantern Festival.

This behavior is called buying the market.

The people who received the red envelopes would give a lamp to the officials of the Shaoyin of Kaifeng Mansion, and these lamps would be hung at the head of the Great Song Palace, and the entire palace would be dressed up beautifully.

At the Lantern Festival, you can see a soldier of the Gyeonggi Forbidden Army every few steps.

They stood in the crowd in full armor, with long and short soldiers and crossbows in their hands to ensure the safety of the temple fair.

There were also a few people on the side of the road who were tied up with a board stuck in the back of their necks with the sins of these people written on them.

These people are all thieves or rangers caught at the Shangyuan Lantern Festival, and their crimes are strange.

For example, snatching hairpin ring jewelry from women's heads; or misbehave; Taking advantage of the large number of people, they were beaten by the women.

Of course, Zhao Huan knew that this was actually a performance, and many of the people who were tied up were prisoners from Kaifeng Mansion, Xing Prison, and Dali Temple Prison, and they were temporarily pulled over to be actors.

That armor can catch up with the thief?!

Everything on the surface is just a scare.

It was the inspectors of the Imperial City Division who really caught the thief, and if they caught it, they would definitely be severely punished.

Zhao Huan leaned on the car and looked blankly at the laughter on the faces of the people at the Shangyuan Lantern Festival, what a good era, how could the emperor of the Great Song Dynasty ruin this splendid country?

Zhu Lian's cheeks were rosy and he said: "The official, I wrote a poem "Qingyu Case Yuan Xi" for my concubines last year, and I will write another poem for my concubines this year." ”

Well?

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