The three days that Li Chunfeng said at the beginning passed quickly!

In the past three days, Li Zexuan's solar system theory has been spreading rapidly in all directions from Chang'an as the center at a stormy speed, and more and more people know about it, and the people in a radius of hundreds of miles now almost all know the questions of "what is the solar system, how many planets are there in the solar system, and what is the cause of the tengu eclipse sun"!

On this day, it seems that as usual, the sun still rises from the east in the early morning, emitting a thousand golden rays, the people have already gone to work in the fields when the sun rises, the merchants have also entered the city at this time, and the officials are either in the court or on duty in the government office, everything looks so normal!

"Xianggong, they all say that this dog eats the day and means that the world will be in chaos, is that really the case?"

Yunshan Courtyard, the Li family, who had long known that there would be a tengu eating day today, didn't go anywhere today, Han Yuxi snuggled up to Li Zexuan's body in the backyard, and asked softly.

Li Zexuan shook his head and said, "Of course not!" Didn't you say it before being a husband? This dog eclipse is just an astronomical phenomenon caused by the movement of the stars, and it has nothing to do with whether the world is chaotic or not, and whether the king of the county is dim or not! ”

Han Yuxi frowned and said: "But these legends have existed since ancient times, and it is difficult for the concubine to turn around for a while!" ”

Li Zexuan smiled and was about to speak, when Pang Feiji suddenly walked in from outside and said, "Master Hou, it's not good!" Li Daochang insisted on going to the atrium of Guanghua Building in the academy, and wanted to use an astronomical telescope to observe the tengu eclipse for a while, but no one could stop him! ”

Before, in fact, in the article "Overview of Astronomy", Li Zexuan not only introduced the causes of solar eclipses, but also reminded the people that when the solar eclipse is coming, don't stare at the sun directly with your eyes for a long time, otherwise it is easy to stab your eyes! Although he mentioned this, not many people seem to have noticed it, because people are only shocked by his theory of the solar system, who cares if looking at the sun with the naked eye hurts the eyes?

Besides, no one among the people would have thought that just two days later, there would really be such a magnificent spectacle as the Tengu Eclipse Day in this land of Datang!

However, did the people pay attention to Li Zexuan, but he can do what he should do, that is, close the atrium of Guanghua Building of Yanhuang Academy and prohibit students and teachers from using astronomical telescopes during the solar eclipse!

He didn't expect to ban the students and teachers of the academy, but he didn't ban Li Chunfeng, a guy who is obsessed with astronomical research.

Hearing this, he hurriedly stood up and said, "Is there such a thing?" I'll check it out! ”

After that, he said hello to Han Yuxi, and then took Pang Feiji out of the door.

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"Daochang Li, the mountain chief has explained, no one can go in today, and Mo can't open the door for you!"

When Li Zexuan came to the vicinity of the atrium on the fourth floor of Guanghua Building, he heard Mo Zhong's helpless voice.

"Commander Mo, please make it convenient, Poor Dao must use this astronomical telescope today, because Poor Dao has very important things, and all the consequences, Poor Dao is willing to bear it!"

Li Chunfeng said unrelentingly.

"Ahem! Mo Zhong, you go get busy first! ”

Seeing this, Li Zexuan coughed lightly, walked out, and said.

"Whoa!"

Mo Zhong couldn't help but breathe a sigh of relief when he saw Li Zexuan coming in person, and then responded with a fist, and slowly retreated!

"Master Hou..."

Seeing Li Zexuan, a trace of embarrassment suddenly appeared on Li Chunfeng's face.

Li Zexuan frowned and asked, "What is the important thing about Daoist Li, who has to use the astronomical telescope today?" Ben Hou has already said that when the tengu eats the sun, it hurts the eyes the most, if the Taoist uses a telescope to observe the sun, there is a chance that he will be blinded by the sun, why do you insist on doing so? ”

Li Chunfeng said with a serious face: "Master Hou, the sun is bright on weekdays, whether it is with the naked eye or a telescope, you can't directly observe the sun, and finally encountered a tengu eclipse sun, at that time the brightness of the sun should be much weaker, if you don't seize this opportunity to see with your own eyes, the poor road is really unwilling!" I hope that the Hou Ye will be fulfilled! Even if there is an accident, the poor road is willing to bear it without regrets! ”

Li Zexuan was silent, he only considered the safety issue, but did not consider the human nature, he did not consider the astronomical spectacle of the solar eclipse for the fatal attraction of an astronomy enthusiast like Li Chunfeng!

Even in modern times, whenever there is a solar eclipse, astronomy enthusiasts from all over the world and regions will flock to the eclipse from far and wide to set up professional equipment in advance, waiting to observe the solar eclipse!

However, today's solar eclipse, according to Li Chunfeng's prediction, should be a total solar eclipse, the sun is 400 times wider than the moon, but it is also 400 times far away from the earth. Because of the symmetry, the moon's shadow, the shadow that falls on the earth's surface, is just wide enough to cover the entire sun. The sun's photosphere is completely obscured by the moon, and the originally bright solar disk is obscured by the black lunar shadow, and at this time, a total solar eclipse occurs!

In addition to total solar eclipses, there are partial solar eclipses, annular solar eclipses, total annular eclipses, etc., but in comparison, it is only during total solar eclipses that we can safely see the sun with the naked eye. During a total eclipse, almost all of the sun's rays are blocked, and only the corona is visible, and the corona is only as bright as the full moon, so we can accept the light at this time.

But the light in a tiny part of the photosphere is enough to harm our eyes, so it's good to have safety measures during a total solar eclipse.

Thinking of this, Li Zexuan said to Li Chunfeng: "Since Daochang Li insists on this, Ben Hou will not persuade you again, but Ben Hou has to take the lens of this telescope to add some color!" ”

Speaking of this, he ignored Li Chunfeng, who was full of joy and doubt, turned to Pang Feiji and said, "Feiji, you go and help me with those inks, and get a glass of water and a brush!" ”

"Yes! Master Hou! ”

Pang Feiji took the order and left.

After a while, Pang Feiji took all the ink, water, and brushes that Li Zexuan wanted, and under the puzzled gaze of the two, Li Zexuan first diluted the ink slightly with water, and then dipped the diluted ink with a brush, and then he held the brush and smeared it on the outer surface of the eyepiece and objective lens of the telescope!

"Hey! Master Hou! You don't want to let the poor Dao use this telescope, why destroy it with ink? In this way, how can the telescope see things clearly? ”

Li Chunfeng was heartbroken and stepped forward to stop him.

Li Zexuan's movements in his hands did not stop, and while smearing, he said: "Who said that you can't see clearly if you get it like this?" This ink is diluted and will not block too much sunlight, so it is suitable for Li Daochang to observe the tengu eclipse sun, so that the damage of sunlight to the eyes can be reduced! ”

Strictly speaking, when observing a solar eclipse, you need to use professional polarized lenses, similar to sunglasses, to reduce the damage of sunlight to the eyes, but this kind of lens Li Zexuan can't make for a while, so he thought of a relatively simple method, using diluted ink to smear the lens of the telescope, although this method is simple, but it is indeed effective.

In modern times, many people have used this method, in addition to it, you can also use exposure film, waste floppy disks, protective glasses for welding, blackened glass, etc., to replace those professional polarized lenses!

When Li Chunfeng heard this, he was a little relieved.

Half an hour later, Li Zexuan coated the two lenses of the telescope with diluted ink, and said to Li Chunfeng: "Okay!" Now Daochang Li will take care of himself! However, although it is coated with ink, please don't look directly at the sun for a long time! ”

"Poor road saved! Thank you, Lord Hou! ”

Li Chunfeng thanked him.

Li Zexuan nodded, then turned around and left!

After he left, Li Chunfeng immediately put his eyes in front of the eyepiece of the telescope, and after a general glance, he immediately felt that the whole world seemed to be smeared with a layer of light ink, and the light was not as dazzling as before, but the clarity of the lens imaging did not seem to be affected much!

Based on this, Li Chunfeng couldn't help but be even more grateful to Li Zexuan!

......................

Around noon, the farmers who are ploughing in the field have packed up their farm tools and are ready to go home for dinner, and the pedestrians and traders on the street are also going home to go home, and they should go to the restaurant, everything looks no different from before, but at this moment, the original clear and cloudless sky suddenly dimmed, the sun that was still shining a moment ago, but at this moment it seems to be partially blocked by something, as time goes by, the area where the sun is blocked is coming more and more, and after a while, The sun was all blocked, and the whole world suddenly became like night!

Panicky!

In the face of this sudden night, the first reaction of the people is panic, after all, it was noon and daylight a moment ago, and now the sky has become completely dark, many people have never experienced such a strange thing in their lives, how can they not panic when they encounter it!

Inside and outside the city, the screams of the people could be heard everywhere in fear, and the people outside the house hurriedly wanted to return home, but it was so dark that they couldn't even see their fingers clearly, so how could they see the way home?

"The devil is here! It must be that all the demons of hell have come out! ”

"It's not an evil ghost, it's a tengu eating day! The tengu is going to eat the sun, everyone quickly copy the guys, take out the gong, and if there is no gong, take an iron basin out, and let's scare the tengu away! ”

"What tengu eclipse day? This is called a solar eclipse! According to Yong'an Hou, it was the moon that happened to be in the middle of the earth and the sun, so the sky suddenly turned dark! There are no tengu, and there are no evil spirits! ”

"When will it light up on this day?"

"Soon, in less than a quarter of an hour, the sky will be back to normal!"

The night fell, and the people were panicked, but after experiencing the initial panic, people remembered the fiery solar system theory that had been circulating in the past few days, and thought that even the imperial court had recognized the correctness of this doctrine, and the people settled down one after another, although the sparse sound of gongs and drums could still be faintly heard in the streets and alleys, but it was far less noisy than the noisy gongs and drums of the whole people beating gongs and drums in the days of the tengu days before!

It can be seen from this that Li Zexuan's "Overview of Astronomy" published in the "Datang Daily" a few days ago still played a certain role!

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Yanhuang Academy, the moment the eclipse suddenly came, the students were still listening to the lecture in the classroom before they got out of school, the sky was dark, and the students were a little panicked at first, but under the comfort of the gentlemen of the academy, they quickly settled down, and many bold students also walked outside the classroom to find out, and this look was suddenly beautiful by the wonders in the sky!

"Wow! What a beautiful strip of light! That's the moon, right? The moon seems to be wearing a necklace, which is so beautiful! ”

I don't know who exclaimed, and suddenly the students in the classroom ran out of the classroom to look up.

During a total solar eclipse, the sun is gradually obscured, and the sky not only darkens, but also appears in strange colors. The temperature will drop by a few degrees, the wind will pick up, and the birds will think the sun is going down and ready to roost.

At the beginning of the total solar eclipse, the light of the Sun's photosphere continues to circle along the edge of the Moon until it encircles the Moon, and at this time, the Moon looks as if it is wearing a necklace, and the bright spot on the edge is called a Berry Bead, which looks very beautiful!

"Let's all go into the classroom! The mountain chief said that you can't look at the sun directly with your eyes for a long time, otherwise you will stab your eyes! All students, return to the classroom now! ”

Although the gentlemen of Yanhuang Academy also had to sigh at the magnificence of the scenery in the sky, they deeply remembered Li Zexuan's original explanation, so the gentlemen walked out of the teaching hall one after another and drove the students outside into the classroom!

In the open-air atrium on the fourth floor of Guanghua Building, Li Chunfeng was fascinated by the telescope, completely forgetting what Li Zexuan had told him before, and at this moment he couldn't wait to put his eyes on the lenses of the telescope, and he didn't want to miss a minute or a second!

"Huh? Doesn't seem like the right light? ”

Suddenly, Li Chunfeng was shocked, and his face became solemn.

......................

At the same time, hundreds of miles away, to the east of Shuofang City, a Turkic cavalry was marching towards Shuofang City.

There are about 20,000 people in this cavalry, although the sergeants on the horses are not wearing heavy armor like the Xuanjia Army, but the momentum exuded by these 20,000 cavalry is not weaker than the Xuanjia Army!

This is an elite, this is the world-famous Turkic wolf horse!

"It's all faster! Be sure to rush to Shuofang City before the Tang Army breaks through the city! ”

A Turkic general, led by him, turned around and shouted loudly at this time.

"Yes!"

The cavalry behind him answered loudly, and then, the whole team, at a faster speed, rushed towards Shuofang City, rolling up smoke and dust all the way!

It's just that this imposing leader of the Turkic wolf cavalry must not have known that there are people waiting for him outside Shuofang City!

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First update!

2-in-1 chapter!

Thank you for the two 10,000 prizes from the Black and Red Plum Fang! (24 March)

(End of chapter)