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There is a very familiar deity—Emperor Fengdu of Beiyin, who is also under the jurisdiction of Emperor Ziwei.

But many people don't know that in astronomy, Polaris does not refer to a certain star, but the star in the direction of the earth's axis at the North Pole of the Earth.Because of precession, the direction of the earth's axis will actually move, so the North Star will also change.

At present, the Polaris we are talking about, the Chinese name of the star is Gouchenyi, and Westerners call it Senajiu.It is not a very bright star, its brightness is only about 2nd magnitude, and it only ranks No.40 among the stars visible to the naked eye throughout the day, which is really not conspicuous.

However, as the North Star, of course it also has its own special status, that is, its position does not change, and the stars all day will revolve around it!Turn literally!And it's visible to the naked eye!And it can be taken with the camera's delayed shutter, which is the so-called star trail photo that is more popular now.If you take a photo of star trails in the northern hemisphere, the point where the center of the star trail does not move is Polaris.

Another very interesting thing is that the current Polaris Gou Chenyi is not a single star, but a triple star system.That is, a three-star system composed of the main star Gouchen-A and the two companion stars Gouchen-AB and Gouchen-B.

The three-star system is a nested system. Taking Gochen-[-] as an example, Gochen-A and Gochen-AB form a double star system revolving around each other, and then this binary star system is connected to another star farther away. AB forms a binary star system.One thing to note is that unlike planets orbiting stars or satellites orbiting planets, all three stars are stars.

Generally speaking, when we look for the North Star, we first look for the Big Dipper, and then look for the North Star according to the extension line of the mouth of the Big Dipper.But when you can't see the Polaris, there are other ways, the simplest is to look for it according to the azimuth.

Polaris is always in the starry sky in the north, and the angle it forms with the ground is equal to the local latitude.Cao Qiulan and Dong Yiyan are now using this simple and crude method, and quickly found the star that is brighter than the small dot next to it.

If you think this method is too simple and rude, or you cannot know the local latitude, there is another method.

In the autumn sky, there is also a special constellation, which Westerners named Cassiopeia.There is also a poignant fairy tale behind it, which will not be mentioned here.Its shape is also very special, it is the shape of a letter W, or you can also think of it as M.Cassiopeia and the Big Dipper are facing each other across the North Star. When the Big Dipper is not visible in the night sky, Cassiopeia can generally be seen.

After finding Cassiopeia, connect the midpoint of Pavilion Dao [-], Pavilion [-] and Ce Xing of Cassiopeia, and extend it five times to the north, and then you can find Polaris.Of course, Cao Qiulan and the others don't need this method, and they are not interested in Cassiopeia.

Looking at the Big Dipper, Cao Qiulan suddenly said, "Tell me, what will the earth be like in 1000 years?" 1 years is too long, and since human beings have clear historical records, there has not been 1 years so long.After the industrial revolution, human science and technology developed faster and faster, and the pace of space exploration went further and further. I don't know if there will be people on the earth ten thousand years later.

Dong Yiyan held Cao Qiulan's hand and did not let go. Hearing this, he turned his head to look at him and said, "No matter what the earth has become at that time, and whether there are people left, I will accompany you back to see the North Star." After all, 1000 The Polaris in the next year is particularly exciting.

It is the brightest star among the stars that are qualified to be the North Star, and it is also a star that people in Xia are very familiar with - Vega.And there will be a very interesting phenomenon at that time, the Altair circles around the Vega.

But we believe that Cowherd should be used to it, after all, this is not the first time.

Cao Qiulan smiled back at him, "Don't forget your promise, after 1000 years, accompany me back to the earth to see the stars." If he wants to accompany him for a long time, it is not enough to become a ghost, he does not want 1 years In the end, he was left alone, alone.

Although Altair and Vega will never meet one day, at least they can still face each other from a distance, and they can still circle for thousands of years every tens of thousands of years.But Cao Qiulan must also admit that Dong Yiyan tonight is also extraordinarily romantic, although Dong Yiyan may not feel or realize this romance.Just as they looked at each other, a meteor pierced the sky.

Cao Qiulan was stunned for a moment, then suddenly remembered that it is the middle of November in the Gregorian calendar, the day when the Leonid meteor shower falls every year.Of course, the Leonid meteor shower is not as stable as the Perseid meteor shower, nor can it be seen on time every year.

However, the Leonid meteor shower has an eruption cycle. When it meets its peak period, the scene will be quite spectacular, and the number of popular meteor showers can reach thousands per hour, so the Leonid meteor shower is also called the king of meteor showers.Now is certainly not the peak period of the Leonid meteor shower, so when the meteor just passed across the sky in the north east, there was no follow-up.

Cao Qiulan and Dong Yiyan were not in a hurry, they held hands, cuddled together, looked at the eastern sky, and waited quietly.Both of them are people who can endure their temper. Although the number of this meteor shower is not large at this time, and it cannot be called rain in the eyes of ordinary people, they don't find it boring.Maybe when two people are together, everything is sweet.

The two stayed on the rooftop until eleven o'clock, and saw as many meteors as they could count with two hands.At this time, it was time for Cao Qiulan to go to bed. Dong Yiyan turned his head and asked, "There should be more people in the second half of the night. Should we continue to wait?" , but it is not so friendly to the observer.

Cao Qiulan shook his head and said, "No, there are many meteor showers every year, and it's not unusual. Besides, if you want to see it, you can still see it when you wake up tomorrow morning." Meteors occur at night, and of course they also occur during the day, but the brightness should be too bright during the day. High is not suitable for observation.However, when the sun has not risen in the morning, the observation conditions are not too bad. They got up early, maybe the sky is not yet bright.

The two still went downstairs holding hands, like elementary school students holding hands and going to the toilet together after class.Before going down the stairs, Cao Qiulan turned his head and glanced at the still brightly lit skyscrapers.He seemed to see someone watching from the window of the building, but it didn't matter.

The next morning everything was as usual, Dong Yiyan never spoke much, and Cao Qiulan didn't say anything about the meteor shower.First of all, not everyone has this literary talent, and secondly, should we organize everyone to go to the rooftop to watch meteors at night?

The third is the most important thing, Cao Qiulan doesn't want to tell others about the process and content of his date with Dong Yiyan, even though in the eyes of others, it is very likely that his date with Dong Yiyan is quite boring.However, these things are like people knowing whether drinking water is warm or cold.

It was a cloudy day on November 11th. Cao Qiulan stood at the window of the room on the third floor of the wax museum, and Dong Yiyan sat on the single sofa in the room and read scriptures.He just promised Cao Qiulan yesterday that he would stay with him for a long time, and that he would return to Earth to see the stars after 15 years, so he had to work hard.Now that he has the power of faith, he has also been recognized by Zu Yuanjun to some extent, which is very good.

But only this is not enough, he needs to work harder.He has the power of faith, the seeds of divine power, and merit. What Dong Yiyan has to do now is to let them take root and grow vigorously. His current goal is not just ghosts and immortals.

Cao Qiulan is also in a good mood because of Dong Yiyan's progress. Most people probably hope that their husbands can make progress, right?Opposite the Wax Museum is a seven-story white building. Their walls are very distinctive, uneven, and have a sense of modern design.

According to Cao Qiulan's understanding, this is a commercial office building, and there are many companies densely crowded inside, some of which occupy an entire floor or half a floor, and some of which are online merchants or small studios with only a small room.People come and go during working hours, and the building is empty after get off work.

It was not yet working time, and the doors and windows of the office building were closed, and it was quiet.Cao Qiulan's eyes moved down, and saw a couple of weddings approaching from far to near, and then... they stopped under the street tree downstairs of the office building.He couldn't help being stunned for a moment. This is a purely commercial area, and there is no residential area. He doesn't think someone will hold a wedding here. Could it be that the car broke down?

Thinking of this, Cao Qiulan glanced at the building next to him. This is not a hotel either.While he was thinking about it, he saw the bride in a white backless wedding dress get out of the car, and then a woman in a gray dress got out of the car. It seemed to be a bridesmaid, and she was helping the bride to lift the hem of the wedding dress.The groom also got out of the car, but he was not with the bride. He walked aside and didn't know what to do.

This makes Cao Qiulan can't help thinking a little too much. Could it be that this is a farce where the bride and groom broke up in the middle of the marriage and decided to regret the marriage?Although it seems a bit unkind to think this way, it is really a bit of joy to think about it.

Besides, if the husband and wife really can't live on, it's better to separate before they get married than to get divorced before, right?After defending himself in this way, Cao Qiulan continued to read with peace of mind.Although in fact, even if he didn't feel at ease, he couldn't do anything about it. It was not up to outsiders to take care of other people's housework.

After looking at it for a while, Cao Qiulan ruled out the possibility that the car was broken, because no one has ever repaired the car.On the contrary, the groom and the bride quarreled a few words in the air, and some went to persuade the quarrel. The specific content of the quarrel was too noisy because of the crowd, so Cao Qiulan couldn't hear it clearly.

However, it didn't take too long to quarrel, and the short-term dispute stopped, and soon a makeup artist came out to fix the bride's makeup on the street.The corners of Cao Qiulan's eyes twitched, this family is really informal, occupying the street, arguing in the street, putting on makeup in the street, do you really think there is no one in the commercial area at this point?He turned around resolutely, and said to Dong Yiyan who put down the scriptures: "Let's go down."

The author has something to say:

To make up for yesterday's nagging, let me talk about the usage of mint first~

1. Mint and wild chrysanthemum tea

30 grams each of mint and wild chrysanthemum, 6 grams of bellflower, decocted.

Twice a day, even for 1-2 days.It can treat the flu, and it's the common flu!

2. Mint silver flower tea

10 grams of mint, 15 grams of honeysuckle, 5 grams of licorice, soak in boiling water, and drink instead of tea.

Peppermint evacuates wind-heat and sore throat, honeysuckle clears away heat and detoxifies.

It can treat anemopyretic cold with symptoms of fever, dizziness and sore throat.

3. Mint Chrysanthemum Tea

6 grams of mint, 10 grams of chrysanthemum, 3 grams of tea, soaked in boiling water, as a substitute for tea.

Mint and chrysanthemum evacuate wind-heat and clear the head, while tea leaves refresh the mind and clear the head.

It can treat colds, wind-heat, and dizziness.

4. Mint comfrey tea

15 grams of mint, 30 grams of Senecio, 30 grams of comfrey, decoction, orally twice, one dose per day, for 2-2 weeks.

It can treat hives.

Then there's the taboo of mint

1. Pregnant women cannot use it!It is best not to use it during breastfeeding, because mint will inhibit the secretion of milk.

2. It is best not to eat it at night, because mint is refreshing, and its effect is probably similar to that of tea and coffee, so you will not be able to fall asleep.

In the next chapter, let’s talk about Qixi Festival with everyone!