If you look at it from the perspective of the relationship between people and people, life can be summarized in three scenes, that is, encounter, parting and reunion, people always start with an encounter, with parting as the final end, and reunion as an embellishment. If it is a comedy writer, then all the separations will end with a reunion, and if it is a tragic screenwriter, then the end of all encounters means a sad parting.

Wang Yinan's eyes, it seems to be a golden season, the leaves of the plane tree in the familiar campus have begun to wither and yellow, slowly falling to the ground, Wang Yinan pushed a bicycle on the way to the dormitory to the cafeteria, and saw a figure wearing a red sweater from a distance, walking in the falling wood, Wang Yinan opened his mouth to scream, but how could he not make a sound, he quickened his pace, desperately trying to catch up, but the distance seemed to be getting farther and farther.

seemed to feel something, the girl in red stopped, turned around slowly, the distance was a little far, I couldn't see it really, Wang Yinan hurried a few steps, opened his mouth and shouted, "Li Wenjing", the girl in red smiled at him, Wang Yinan stopped, but the woman was clearly not Li Wenjing, more like Deng Ruoyan's appearance, "A man", the voice seemed to float from the sky, Wang Yinan blinked his eyes vigorously, and saw that the girl in red looked like Zhou Hui. Wang Yinan rubbed his eyes carefully, and the face in front of him kept changing like a marquee, faster and faster, and then scattered like fragments.

"Whew", Wang Yinan opened his eyes, woke up from his sleep, and touched the sweat on his forehead, "Thinking about it day and dreaming at night", it seems that the three girls are good, how can I say that I am not too young, it seems that such an unforgettable love is not bad? The girl hasn't done anything yet, Wang Yinan has already dreamed of hugging left and right.

"I have a little secret, a little secret, I won't tell you, I won't tell you", Wang Yinan's phone rang, saying how coincidental it was, Wang Yinan saw the name of the caller, and was startled, the phone was called by Zhou Hui, "No, I'm just thinking about it, what's wrong, this call came over?" “

"Wang Yinan, I'm Zhou Hui",

"I know, you're done filming in Prague?"

"The early filming is over, today at 12 o'clock at midnight, our movie premiere, there is a simple premiere, Director Lou asked me to ask if you can participate."

"Where?" , Wang Yinan asked,

"The New Emperor United Cinema City in Dongda Hutong", Zhou Hui said,

Wang Yinan hesitated, although there is really nothing to do recently, but those filmmakers, to be honest, Wang Yinan really has no interest in making friends. Probably sensing Wang Yinan's hesitation, Zhou Hui added, "Didn't we say in Prague that you would have the opportunity to accompany me to see the starry sky, or today."

What else is there to say, a beautiful woman has an appointment, it must be done with all her strength and death. Wang Yinan asked Zhou Hui's address, it was a coincidence that the community where the two lived next to each other, of course, Zhou Hui bought a high-end residence in Cuiping Bay, Wang Yinan was just a tenant of Cuizhu Garden on the side, and you can tell the difference by looking at the name.

"It looks like it's time to buy a house, there is no house floating in the imperial capital, and there is always no feeling of home", Wang Yinan thought, the two made an appointment to meet at the gate of Cuiping Bay at eight o'clock in the evening, Zhou Hui stopped driving, and took Wang Yinan's free ride, Wang Yinan was secretly glad that he had just bought the face goods he had taken, otherwise, he had to hurry up and ask Zhang Qi to borrow a car, and lose more shares.

As a scholar who has mixed with the astronomical interest group, Wang Yinan is still relatively proficient in watching the stars and bubble girls, first of all, a large enough astronomical telescope is a must, Wang Yinan took out a twelve-inch Schmidt refractive reflection telescope from the debris stacked at home, the astronomical telescope is still quite particular, and people who don't know how to do it always care about magnification.

In fact, the magnification is mainly used to observe the moon or the planets of the solar system, and for the observation of stars or galaxies nebulae, the more important indicators are caliber, parallax, etc., in short, the larger the caliber, the more expensive. A twelve-inch telescope is already quite a small space for amateurs.

Then, a perfect star map is a must, when Wang Yinan was in elementary school, it was really necessary to take the printed star map, according to the current date and time to the starry sky to the stars, now although the stars are not very visible, but the star map App such as Star Walk can completely replace the printed star map.

Next,It's the place that shows Wang Yinan's real compulsion,Wang Yinan bought an EQ6-level equatorial mount before,This is more professional,Anyway, the equatorial mount is a device that can adjust the horizontal and vertical position,Just track the stars,12-inch Schmidt with EQ6-level equatorial mount,It's a star-chasing artifact。

Of course, that's all, how can it show Wang Yinan's madness, Wang Yinan found the manual of the equatorial mount, and found that his stepper motor has a control interface that uses RS232, simply put, it is a serial port on a general personal computer, Wang Yinan took out a simple Raspberry Pi development board, and Wang Yinan bought a lot of toys before this thing.

THERE ARE BLUETOOTH, WI-FI AND RS232 INTERFACES ON THE RASPBERRY PI DEVELOPMENT BOARD AT THE SAME TIME, HE WROTE A SIMPLE RASPBERRY PI PROGRAM, FORWARDING THE BLUETOOTH SIGNAL DIRECTLY TO THE RS232 SERIAL PORT, AND THEN CONNECTING THE SERIAL PORT OF THE RASPBERRY PI DEVELOPMENT BOARD WITH THE SERIAL PORT OF THE EQUATORIAL MOUNT.

Star Walk on the mobile phone provides an interface for developing plug-ins, Wang Yinan first used the system's speech recognition API, wrote a simple speech recognition input plug-in, the basic function is to say a constellation or planet name, the voice is converted into Chinese, and then locate the specified star in Star Walk.

Then, this is the beginning, the plug-in obtains the position of the star from the Star Walk, and then calculates the horizontal and vertical positions of the equatorial mount according to the current time and local latitude and longitude, and then converts it into the control signal required by the stepper motor, transmits it to the Raspberry Pi development board through Bluetooth, and then converts it into serial port instructions through RS232 and sends it to the stepper motor of the equatorial mount.

The end result is that you just say "Moon", "Mars", "Sirius", "Crab Nebula" and so on into your phone, and the astronomical telescope next to it will automatically point at the star, and adjust the pointing with the Earth's autobiography to ensure that the observation target is always in the center of the lens.

Wang Yinan spent a whole day finally finishing the code, passing the debugging, and testing it against the moon showing a little bit of the sky, OK, everything is working normally, look at the time, it's almost eight o'clock, and I haven't eaten yet, but I can't take care of it, presumably the premiere in the evening, I should always give some food.

Put the pickle girl equipment in the trunk, Wang Yinan hurriedly drove to the gate of Cuiping Bay, it was a little late, Wang Yinan leaned the car on the side of the road, stretched out his head to look left and right for a long time, and did not find Zhou Hui's shadow, was about to make a call, the co-pilot's door was opened, a big brimmed hat, a long scarf, and half of the big sunglasses that covered the whole face, the figure in a dark coat rushed up, Wang Yinan's GL was relatively high, and the girl who climbed into the car was a little short, and it took a lot of effort to climb into the car.

Wang Yinan looked carefully for a long time before he recognized that the girl who wrapped herself tightly was Zhou Hui. "Hahahaha", pointing at Zhou Hui, Wang Yinan laughed for a long time, "How did you make yourself like this", "Drive quickly, do you think I want to". Zhou Hui said angrily, "What should I do if I am recognized."

"Zhou Hui's mysterious boyfriend", "movie star Zhou Hui has a tryst with someone at night", thinking of the possible title of tomorrow's second-rate tabloid, Wang Yinan shuddered, hurriedly started the car, and went straight to Xiangshan.

Seeing that the Spring Festival is coming, there is no one on Xiangshan, it is rare that the weather in the imperial capital is good today, and after the lights of the city in the distance are dimmed, the stars slowly reveal their true faces. Parking the car in a parking lot near the top of the mountain, Wang Yinan carried the big guy and climbed to the top of the mountain with Zhou Hui.

Put down the Schmidt telescope, adjust the datum level, turn on the equatorial mount, Wang Yinan handed the mobile phone to Zhou Hui, Zhou Hui looked at Wang Yinan puzzled, said to look at the stars, should not hold the star map, look for the sky, by the way, point out a few constellations, show your knowledge, take a mobile phone a few meanings.

Wang Yinan, don't talk about it, that kind of old-fashioned trick is too low, it's not suitable for me at all, he said to Zhou Hui, "If you want to see anything, just say it directly."

So amazing? Zhou Hui took the mobile phone in disbelief, tried to say "Mars", and saw that the motor of the equatorial mount began to rotate, and the telescope turned around, pointing to the sky close to the horizon, and then fine-tuned it up and down, and then, the mobile phone made a "tick" sound.

Zhou Hui leaned over to the eyepiece, looked through the lens, and saw a fiery red planet in the middle of the lens. Zhou Hui covered her mouth and looked at Wang Yinan in surprise, I can't help but give full marks to this forced pretend, but then again, such a set of things can be done in one day, and it is really difficult for him, if you really let the outsourcing company set up a project, it will definitely not be possible to do it in three or five months, 1.8 million yuan.

Zhou Hui is obviously not the first time to look at the stars, ordinary portable astronomical telescopes, it is worth seeing that Mars, which is the closest to the earth, plus Venus at most, of course, if the aperture and magnification are large enough, you can look at the rings of Jupiter, which is still very beautiful.

The best thing to see is the Earth's satellite, the moon. The moon, which is 380,000 kilometers away from the earth, occupies the lens of the entire eyepiece, and the crater on the moon drags out a long shadow under the illumination of the sun, there are mountains and basins, after Zhou Hui pointed the lens at the moon, he has never left, the Copernicus crater in the middle of the moon, and Archimedes in the upper part, Plato's crater, and of course, the low dark Chenghai and Jinghai. Zhou Hui's mouth was full of words.

Wang Yinan was a little dumbfounded, he, a science and engineering student, could be regarded as a person who had been in the astronomy interest class for a long time, and he had nothing to do to get Schmidt to look at the stars, and he didn't seem to be as familiar with the moon as Zhou Hui. Why is it popular to cross borders these years, you say that I study physics across a computer, you are a movie actor, and you also cross an astronomer, this picture is too emotional.

Zhou Hui looked at it for a long, long time, and when even Wang Yinan was a little overwhelmed, she raised her head, and there were faint tears in her eyes.

"Can you see the place where Apollo landed on the moon?"

Wang Yinan was stunned, "This, no matter how much the aperture of the telescope is a hundred times larger, it can't work."

"Can you see the far side of the moon?"

Eldest sister, don't you have to test me like this, the moon always seems to only face the earth, okay, if you want to see the back side of the moon, then there must be a flying machine around the moon, "I'll ask the people of the Chang'e project", Wang Yinan said very seriously, "I have a little friendship with the Air Force, I can think of a way."

Zhou Hui burst into tears and laughed, "Teasing you, of course I know that the back side of the moon can't be seen on the earth."

"But I really want to see the far side of the moon."

Wang Yinan was silent, he knew that what Zhou Hui needed now was a listener...

Seemingly, this is another long story.

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