There are traces of the galaxy

Although the senior sister didn't urge him, Li Zhi finished the popular science article immediately after returning to his residence.After sorting out the documents, it was past eleven o'clock. Li Zhi was so sleepy that he couldn't keep his eyes open. Before going to bed, he went through the materials sent by Huang Yan again, and had a general understanding of the public welfare activities.

The City Planetarium is partnering with the Yard on Saturday afternoons for a Saturday afternoon event called "Catch the Stars," which sounds like a playful name, and it's really for the little ones.At that time, the planetarium will invite 120 left-behind children from counties near Tingzhou City to visit the museum for free and give voluntary explanations.

The activity process is also simple. First, the instructor will give a short lecture, and then let the volunteers lead the children to visit the various exhibition halls in the museum.The recruitment of volunteers is entrusted to the Volunteer Association of the School of Astronomy, and the selected volunteers are also from the School, but there are also some astronomy enthusiasts from other schools.

Li Zhi finished browsing the event planning case, glanced at the list of volunteers briefly, and fell asleep.It's a fairly rewarding activity, and it shouldn't be a problem or a hassle.

The weather on Saturday was fine, cloudless, and the autumn sun was not so strong, and it was warm when it shone on people.Chen Feilan drove Li Zhi and two students to the planetarium. Li Zhi sat in the co-driver, so he was unavoidably restrained along the way. Fortunately, Chen Feilan didn't ask about the subject anymore, but chatted with them about small things in life.He was holding the steering wheel with a relaxed posture, with a loose smile on his face, and he seemed to be easy to talk. Li Zhi gradually became less uncomfortable.

Chen Feilan told them that after the lecture, there was still an exchange meeting to attend. After the meeting, he estimated that he would have dinner with some old friends, and it would be very late, so he just asked them to go back directly after the lecture.

The external structure of the planetarium is a huge glass dome, which is magnificent and has a sense of technology.The sun shone on the dome, and it was dazzling, making it difficult for people to look directly at it.

The tutor went to the parking lot to park his car, and he will be there later, Li Zhi and the others went in first and waited.A group of young people stood at the entrance of the hall, each wearing a uniform volunteer sign around their necks.Li Zhi saw the familiar figure at a glance. Lin Chaosheng was standing in the crowd, looking down at some A4 papers in his hand.He is tall, long-legged, and good-looking, and he looks outstanding wherever he stands.

When Li Zhi walked to the door, the eyes of the two collided, and a bright smile appeared on Lin Chaosheng's face.

He let the two classmates go in first, and walked straight to Lin Chaosheng himself, "Why are you here?"

"I'm here to participate in volunteer activities," Lin Chaosheng waved to him the volunteer sign hanging around his neck, "What about you?"

"I... that's right, I came with my mentor."

Lin Chaosheng immediately understood: "The professor from the School of Astronomy who gave the lecture is your tutor."

"Correct."

"I actually thought about this possibility before," Lin Chaosheng smiled, "but I didn't expect it to be so. It's a bit surprising."

Li Zhi was also surprised, more of a surprise.He wanted to say something more, but from the corner of his eye he saw the instructor walking towards him, so he had no choice but to say, "I'll go first, and I'll find you in the exhibition hall when I'm done."

"Okay." Lin Chaosheng nodded and said.

Li Zhi emphasized again: "You have to wait for me."

Seeing that he was so serious, Lin Chaosheng wanted to laugh a little, but he also said seriously: "Well, I'll wait for you."

The lecture mainly revolved around the development history of Tingzhou Planetarium and some cutting-edge instruments and equipment in the museum, interspersed with some popular science, and Li Zhi was responsible for recording and summarizing.

The content of the lecture was a bit boring for primary school students of this age, but the children sitting in the audience were very polite, probably because the teachers in the same class had specially explained that no one made any loud noises, and even the sitting postures were well-behaved.This reminded Li Zhi of some children he met before. Entering the planetarium was like entering an amusement park. Not to mention running around in the venue, they even yelled loudly, making people uneasy.

After the lecture, the children were divided into groups of six, and the volunteers of each group led them to different exhibition halls in an orderly manner.

Li Zhi finished the work assigned by the instructor in the meeting room, and then went to the lobby on the first floor to check the distribution map of the various exhibition halls in the venue.

He sent Lin Chaosheng a message: Which exhibition hall are you in?I will look for you

There is no reply for a long time, Lin Chaosheng may be explaining to the children at this time, and has no time to look at the phone.Should have said hello in advance, Li Zhi put the phone back into his pocket sullenly, and decided to take a casual stroll first, maybe he would meet him.

Looking at the timetable, the 4D exhibition hall on the second floor is currently showing the astronomical theater "Autumn Starry Sky" with a duration of 10 minutes. Li Zhi immediately gave up the idea of ​​going to the second floor.When he was in high school, he watched a 4D movie, but he was chilled by the jet of water sprayed from the seat, and he still has lingering fears.

He decided to search on the first floor first.Walking into the exhibition hall A, the theme of this group's explanation is the moon and meteorites, and the explainer is a boy wearing glasses.Li Zhi didn't stay too long, and went to the next exhibition hall.

Hall B has an all-sky projection system, which can present a three-dimensional sky effect, and can clearly display 88 constellation maps and nebula maps.

When Li Zhi entered, the guide was introducing Nebula to the children.

"Everyone, look at this nebula, does it look like the spread wings of a butterfly?" The guide pointed to one side of the butterfly nebula and said.

The children raised their heads in amazement and said in unison: "Like!"

"So, its name is the Butterfly Nebula, isn't it beautiful?"

They dragged their voices to answer again: "Yes——"

"The Butterfly Nebula is also a planetary nebula. It is also the product of the late evolution of sun-like stars, the last stage of a star's life..."

This is obviously memorizing scripts, the language is too written, and it is not easy for children to understand it.Li Zhi looked at those elementary school students, and sure enough, they all stared wide-eyed, ignorant and confused.

"Will Butterfly Nebula die?" Youdao's immature female voice suddenly sounded.

"Uh..." The narrator was a tall boy, he was obviously stunned for a moment, and explained dryly: "It can't be said that, the expansion and explosion of stars is a natural phenomenon in the evolution of the universe, and the Butterfly Nebula is about 4000 million miles away from us. light years..."

"Four thousand." Li Zhi reminded.

The boy glanced at Li Zhi and continued, "Oh yes, it's four thousand, four thousand light years, it's very far away from us, we can see that the central star of the Butterfly Nebula is in a dying state, but it's very possible that this A star exploded long, long ago."

The girl who asked the question pursed her mouth, as if she was not very happy.

The habitual thinking of most science and engineering men is like this. They talk one after another and are very direct. Li Zhi can feel that the boys who explain are paying attention to their own way of speaking, but they have not achieved the expected effect.But if it is replaced by myself, it may be the same, and it may even be worse than him.

It doesn't matter if you don't understand the abstract content, the image is the most intuitive, the children are gradually attracted by the changing starry sky above their heads, looking up at the sky quietly, time seems to stand still at this moment.

However, this silence did not last long and was soon broken.

"you're lying!"

"I do not have!"

"You have!"

"no!"

……

The empty exhibition hall echoed with two children arguing like wheels, the volume was very low, but everyone could hear it.

"What's going on," the guide asked patiently in the past, "what are you arguing about? Can you tell me?"

Li Zhi also walked over.

One of them was the little girl who asked the question just now. Her eyes were already full of tears and she was about to shed them.

When Li Zhi saw this scene, his footsteps paused slightly, and at the same time, his mind was buzzing. The non-existent cry echoed strongly in his ears like a super-powerful loudspeaker in the vegetable market... Help, he is most affected No children cry.