2021-07-07

Chapter 9 Planetarium

The wind is cool. Li Mo is half asleep.

What time did the window open. I have to close it. I got up and I couldn’t move. I wanted to shout. The sound was stuck in my throat. Struggling desperately, unable to make a sound, a gray shadow slowly approached, and there was a lot of noise in my head. I felt that my brain was invaded by darkness, and my consciousness was gradually squeezed to the edge of my brain, and I was about to leave my body.

“Di Di Di Di Di”, Li Mo suddenly opened his eyes, his consciousness came back, it turned out to be a dream.

Get up and walk to the window, through which you can see the flashing neon lights on the street. Closing the window, he sighed and sat down slowly in front of the desk.

Take out the book with the black cover, open the title page, and pick up a pen to revise.

1. According to the “General Principles of Cosmic Civilization Law”, gray shadow people can hide from me, but they cannot lie.

Add note “gray shadow people are Pajeluian”.

2. The question I asked confirms that I am useful to him, and there is no mortal danger for the time being.

Add a note “This is questionable.” Li Mo hesitated.

3.gray shadow people’s identity guess: 1, artificial intelligence 2, special person 3, alien.

Add a note “Definitely Alien”.

4.gray shadow’s purpose is to force me to study temporarily.

Add a note “Learning Aid System – Pink Learning Machine”.

5.great hall may be in my head, but it can affect reality.

Add a note “OK”.

6. What is the general principle of the law of cosmic civilization?

Add a note “The specific content of the law is unknown, but it should limit the communication between high-level civilization and low-level civilization.”

7. Carbon-based creatures, Pajelu star is A barren red planet.

Added note “Potentially coveted Earth’s soil”.

The remarks were added, and Li Mo sat quietly at the desk. He read the text written on the black book countless times.

Sun shone brightly, Li Mo came downstairs to Chen Shuxian’s house with a kettle. Chen Shuxian was still lying in front of the window on the second floor, sticking out a small head.

“Go to the planetarium together?” Li Mo greeted.

“Wait a minute, I’ll change.” Chen Shuxian saw Li Mo coming and ran away from the window.

“Aren’t you wearing clothes? Why do you want to change clothes?” Li Mo couldn’t understand.

After waiting for half an hour, Li Mo’s legs were almost numb, and Chen Shuxian opened the door and appeared in front of him.

She looked cute in a long pale-yellow chiffon dress with a string of crystals around her neck and wet hair.

I still remember the old meeting. Chen Shuxian’s appearance has changed greatly, and he does not look like the female bully in Li Mo’s memory at all.

He felt a little startled.

“Have you seen enough, let’s go”, Chen Shuxian pretended not to see Li Mo lost self-control, and walked in front with his hands behind his back.

“Good” Li Mo is embarrassed by his lost self-control.

It took two bus transfers before they came to the planetarium.

The planetarium in Meng City is newly built, and it is clear that the old city has not yet adapted to its existence. Maybe the people in Meng City haven’t adapted to this kind of popular science. There are not many people in the planetarium.

The hall is filled with astronomical popular science books, and the wonderful starry sky is playing on the wall-mounted TV.

Li Mo stopped in front of an LED screen introducing the galaxy.

Earth’s equatorial circumference is about 40075 kilometers, the radius of the solar system is 40 AU, about 6 billion kilometers (bounded by the Nether King Star orbit), which is equivalent to 470000 Earth flats in the same length on the plane.

The sun is an ordinary star in the Milky Way. It sits on a spiral arm of the Milky Way called the Orion Arm, about 30,000 light-years from the center of the Milky Way. The Milky Way is a barred spiral galaxy with a diameter of 200,000 light-years and 200 billion to 400 billion stars.

And the entire universe is estimated to have a trillion galaxies through the Hubble Ultra-deep Field. How many Earth or Pajelu planets will exist in this trillion galaxies, and how many civilizations will there exist?

“What are you doing? didn’t expect you to be so interested in astronomy.” Seeing Li Mo standing there, Chen Shuxian next to him pushed him.

“It’s nothing, I just think that human beings are too small, we are like a speck of dust compared to the universe.” Li Mo came back to his senses.

“Do you know this picture? It was taken by the probe spaceship.” Chen Shuxian said, leading Li Mo to a picture.

There is only one blurred light beam on the whole picture, Chen Shuxian pointed to a small spot on the blurred light beam and said: “Look, this is our Earth.”

” This blip, Sagan said at this point: “In this blip, there are all of us Earth. There are people you love, people you know, people you have heard of, you and me! “” Chen Shuxian blinked her big bright eyes.

“There are you and me in the latter sentence. You added it yourself, right?” Li Mo questioned Chen Shuxian’s words.

“In 1996, astrophysicist and famous science writer Carl Sagan said something very famous: “On this little point, everyone you love, everyone you know , everyone you’ve ever heard of, and everyone who’s ever existed, lived there all their lives. Here are all joys and sufferings, thousands of confident religions, ideologies, and Economics say, every hunter and seeker, every hero and coward, every creator and destroyer of civilization, every king and peasant , every young couple in love, every hopeful child, every parent, inventor and explorer, every moral teacher, every corrupt politician, every superstar, every Supreme leader , Every Saint and sinner in human history lives here – a speck of dust suspended in the sun. “”

Li Mo recited Carl Sagan’s words verbatim. In order to accumulate points, he exploded several astronomy books, which happened to have the description of this photo and Carl Sagan’s words.

“This photo was taken in 1990, when the Voyager 1 probe was about to fly out of the solar system, at a distance of 6 billion kilometers from Earth,” he added.

“The explanation is very good, are you a planetarium instructor?” a little girl raised her hand and asked, followed by a group of children.

Li Mo realized that there were people around him, including parents with children and couples. They were all immersed in Li Mo’s description of the photo.

“Can you explain the solar system to our children?” She is a kindergarten teacher.

“My instructor?” Li Mo realized that he had caused everyone’s misunderstanding.

“No, I’m not. I’m just an ordinary astronomy hobbyist.” Li Mo smiled slightly.

Chen Shuxian watched quietly beside him, his big eyes twinkling.

She took the initiative to take Li Mo’s hand and rushed out of the crowd, the two of them smiled at each other in a remote corner.

“didn’t expect to attract so many people just by memorizing a book.” Li Mo apologized to her.

“Your memory is so good that you can memorize such a long book without any ill-advised words. Do you like astronomy very much?” Chen Shuxian curiously asked, normally Li Mo’s academic performance was not very good. it is good.

“I really like it, don’t you think the universe is very big?” Li Mo was infected by the atmosphere of the planetarium, and the secrets in his own mind could not be told to others.

“In your eyes, Earth is already very big, and it is impossible for us to spend our entire lives walking through every corner of Earth. But Earth is just a very ordinary planet in the solar system. There is also a primordial star cluster in the solar system around, and there are countless asteroids and comets in it.”

The more you know, the more small you feel.

“The solar system is already big enough. If the solar system is placed in the Milky Way, it is only a drop in the ocean. And in the Milky Way, there are even 200 billion stars similar to the solar system.”

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Li Mo felt Chen Shuxian’s eyes staring at him, and slowly preached,

“The Milky Way is already very large, and there is a supercluster of galaxies around the Milky Way, this supercluster There are more than 100 galaxy groups in the galaxy cluster that are larger than the Milky Way. If it travels through the supercluster at the speed of light, it will take at least 200 million years.”

“The supercluster belongs to A part of the super-supercluster, and the coverage of the super-supercluster can reach 520 million light-years. There is no way to calculate the number of stars in this super-supercluster. Although the super-supercluster is very large, But compared to the universe, it is just a hair.”

“Earth is just a speck of dust in the universe.” Li Mo said, suddenly sad, he felt himself It’s too small.

Chen Shuxian looked at the melancholy big boy in front of him, the faint sadness revealed in his piercing eyes. She was very distressed.

“Let’s visit the astronomical telescope. I heard that the newly purchased telescope at the planetarium can see the lunar craters.” She took the initiative to ask Li Mo to visit the astronomical telescope, maybe this could dilute his sadness Bar.

(End of this chapter)

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