Spring always seems to be so short-lived, as soon as I hear her footsteps, I turn around and see her departing back.

Summer is approaching, and this is the perfect time to play basketball.

It's not dry or dry, take off your jacket when it's hot, and take off your short sleeves when it's hot, and go into battle shirtless.

Lin Nan will often go to the basketball court to play for a while under the morning sun between self-study classes in the morning or at sunset after school in the afternoon to move her body.

At this time, his basketball court would be full of people, all of whom came to see the first National High School Basketball League champion MVP.

Although this year's league was generally well held, the coverage area and the number of participants basically enveloped the whole of China, and people's enthusiasm was all mobilized.

But the All-Star Game and the Slam Dunk Contest after the game are not yet perfect.

However, for young high school players, if they want to go further on the road of basketball, they now need more precipitation than all kinds of limelight.

They are still underage and have not yet reached the peak of their basketball prowess.

But none of this has anything to do with Lin Nan.

Although many people have come to persuade him, including teammates on the school basketball team, a joint letter from Lin Nan's fan base, well-known coaches and scouts, and so on.

But basketball is destined to only be Lin Nan's hobby in the future, not his profession.

Now, Lin Nan listens carefully to classes every day, reads books with Sidong during recess or self-study classes, and plays basketball in physical education classes or in his spare time.

Books are the ladder of human progress.

Although Lin Nan has no clue about his next goal, he believes that reading more books will always inspire him.

Until one evening self-study, Lin Nan took the extracurricular reading materials handed by the classmates in the back row as usual.

It's still a magazine.

Unlike the last time he was inspired by the business magazine, this time it was an art magazine.

The whole magazine is full of small and fresh words with small and fresh pictures, which makes people feel very relaxed and comfortable.

And when Lin Nan turned to a column with the theme of "Starry Sky", this text instantly touched his heartstrings.

"Do you still remember the bright starry sky you saw that year? Because of the rapid development of modernization, the city is full of high-rise buildings and bright lights, and the darkness is completely away from us, but at the same time, it is also far away from the colorful starry sky. ”

"When I was a child, every night, when I looked up, I would see the starry sky, all twinkling and twinkling, and I couldn't count them. ”

"Nowadays, living in the city, the once vast starry sky is now faintly visible, and there are only a handful of bad weather and severe air pollution. ”

"Where can I see the starry sky of yesteryear?"

These words hit Lin Nan's heartstrings, and he clearly remembered that there were indeed a lot of stars in the sky at night when he was a child.

And now......

Lin Nan glanced at the night sky through the window, and because of his vision, he seemed to see five or six bright lights.

Lin Nan turned the page and continued to look down.

On the second page, there is no more plain text in front of it, but a few pictures and a few lines of small print.

The pictures are all starry sky with halos, and some have a silvery-white band of light.

Through the pictures, Lin Nan can imagine the beauty of the starry sky in the photos, but unfortunately he doesn't know where it was taken.

Soon, Lin Nan found the answer in those few lines of small print.

It reads: The four major stargazing locations in China:

NO1. Aba and Sichuan Provinces.

NO2. Anji, Zhejiang Province.

NO3. Zhangye, Su Province.

NO4. Mohe, Hei Province.

Lin Nan couldn't help frowning when he saw that they were all places he hadn't been to, and they seemed to be far away from Lingnan City.

Look at another small line of text, which reads: Four major stargazing locations abroad:

NO1. Flagstaff, M country.

NO2. Namibrand Nature Reserve, Namibia.

NO3. Aoraki Mackenzie International Dark Sky Reserve, New Zealand.

NO4. Galloway Forest Park, Country Y.

Lin Nan's brows furrowed even tighter, he hadn't gone abroad yet.

However, whether it is these places at home or abroad, he wants to see them.

Because Lin Nan suddenly thought that he didn't seem to have seen the galaxy with his own eyes.

Looking at the night sky outside the window, there were only a few small stars with insufficient brightness in the dark night, and the half-dead appearance made Lin Nan unbearable to look at it directly compared to the pictures in the magazine.

In fact, Lin Nan also knows that the environment in Qingshui County is not bad, and he can usually see more stars, maybe there are so few because of the weather today.

But Lin Nan now really wants to see what the Milky Way looks like, and this feeling of being unstoppable really makes him uncomfortable.

I can't stop the yearning for the starry sky in my heart.

Thinking of this, Lin Nan took out his mobile phone directly from the drawer, anyway, Yu Xianglin, the head teacher sitting on the podium, would not care about him.

Originally, Yu Xianglin was very indulgent to Lin Nan, but once in a self-study class, he quietly walked behind Lin Nan and saw that he was using his mobile phone to check physics problems!

Since then, Yu Xianglin has completely ignored Lin Nan, he knows that this national champion is different from others, he doesn't use his mobile phone all day, chatting or playing games, he has his own ideas and goals.

When he turned on the screen, Lin Nan naturally opened the teacher's website, and was just about to look for the starry sky and astronomy in the classification to see if there were any teachers in this area.

But then it occurred to him that he is now a novice in this knowledge, and the teacher said that online apprentices are all required.

However, Lin Nan still found the starry sky column and clicked on it, and the "master user" who appeared in front of him was "Flying Sky".

Lin Nan knows that generally speaking, each category will have an apprenticeship condition, and there will also be a training method to achieve this condition.

But there's nothing in the starry sky.

Lin Nan thought that it might be because it was relatively niche, and the staff of Shishuo Network had not yet come here.

So, Lin Nan clicked on the avatar of the person "Flying Sky", and the user profile displayed: "People who are interested in the starry sky, please join QQ Qunling South to watch the starry sky, the group number is ......."

Lin Nan laughed instantly, so lucky, this flying sky turned out to be a native of Lingnan, and he was in the same city.

Lin Nan immediately closed the Shishuo network, opened QQ, and just glanced at it, he had already written down the string of QQ numbers.

Lin Nan directly opened the group number added, entered it, and then saw the group "Lingnan Looking at the Starry Sky".

Click Apply to join.

A question immediately popped up: "Why did you join this group?"

Lin Nan thought for a while and wrote: I want to see the bright starry sky and the Milky Way.

After a while, Lin Nan's QQ received a message, showing that the group had been successfully added.

Lin Nan just went in.

"Welcome newcomers to join!" and all kinds of other pictures were sent out.

The refresh of dozens of pictures made Lin Nan feel the enthusiastic atmosphere of this group.

After all the pictures were posted, another message popped up:

"Please modify the group business card, preferably with a name related to the starry sky. ”

The phrase comes from "flying skies".

Lin Nan also saw that the flying sky was the administrator of this group.

After thinking for a while, Lin Nan smiled and changed the group business card to: "M78." ”

At this time, the people in the group no longer paid attention to Lin Nan, a newcomer, this was a large group of hundreds of people.

Lin Nan quietly watched them chat:

"Uncle Xiang, where are you going to go tonight?"

Lin Nan immediately captured two key words: "Uncle Xiang" and "out of the stall".

The former should be "Flying Sky", and judging from this title, he must be a big guy.

As for "out of the stall", Lin Nan doesn't know what it means.

Read on.

"Go to Qinglan Mountain, I'm packing up my things now, and I'm going to drive off immediately, do you want to go together?" replied Flying Sky.

"There's something going on tonight, next time. The man replied instantly.

Lin Nan was shocked again, wasn't Qinglan Mountain in their Qingshui County?

Lin Nan also went there once when he was a child, it was a place to burn incense and worship Buddha, and most people went there to keep safe.

However, there seems to be a Qinglan Mountain Cultural and Martial Arts School on it, and I heard that you can learn martial arts.

Lin Nan suddenly thought that he still had an iron sword at home, and it was a little heavy when he picked it up, which he bought when he and his parents went there when he was a child, and now he doesn't know where to put it.

But Lin Nan was puzzled for a moment: Can you see the starry sky on Qinglan Mountain?

The smart Lin Nan also figured it out, this is an astronomical starry sky group, and "out of the stall" should mean to see the stars.

Thinking of this, Lin Nan typed in the group and asked, "Can Qinglan Mountain see the Milky Way?"

Soon, Uncle Xiang answered him below:

"If you're lucky, if the weather is good, you can see it with the naked eye, but it's not clear, but with an astronomical telescope, you can usually see it, and you can see it more clearly. ”

As soon as Uncle Xiang looked at Lin Nan's group business card "M78", he knew that he was a newcomer who had just joined the group, and he must not be very old, M78 haha.

So he patiently answered Lin Nan's doubts.

After speaking, Uncle Xiang also posted a picture below.

Inside are the tools for the "stall": an astronomical telescope, a photographic camera, and something similar to a microscope.

Lin Nan continued to ask, "What is that microscope-like thing?"

As soon as the words were issued, someone replied: "That's the equatorial mount, and three things are indispensable for playing astronomy, the astrophotography primary mirror, the equatorial mount, and the camera." ”

Lin Nan immediately asked curiously, "What is the equatorial mount for?"

He can understand the astrophotography primary mirror and camera, why do you need an equatorial mount, what does astrophotography have to do with the equator?

Uncle Xiang replied below, "The equatorial mount was made to improve the shortcomings of the horizon device. Its main purpose is to overcome the effect of the Earth's rotation on stargazing.

When using an equatorial mount, it should first align its polar axis with the north celestial pole. After (ideally) being fully aligned, the telescope is facing any star, and the declination does not need to be adjusted, but only the telescope rotates at a constant speed in the direction of right ascension (or time angle) according to the speed of the star, so that the star can remain in the field of view of the telescope.

It's like when making a movie, the characters are moving, and the camera is also moving, but the people are replaced by stars. ”

Uncle Xiang's detailed explanation made Lin Nan understand it very clearly.

After learning in physics, Lin Nan knew that the stars were moving, but he didn't expect that astronomical photography would rotate with the angle of the stars.

The astronomy, which was full of mysteries, instantly aroused Lin Nan's strong interest.

But after glancing at the time, the evening self-study was about to end, and after Lin Nan politely said goodbye to everyone in the group, he put away his mobile phone and prepared to go back to the dormitory after school.

What Lin Nan didn't know was that a friend in the QQ of Sidong's mobile phone sitting next to him happened to be called "Flying Sky".