"Students, some people say it is like a big river, while others say it is like a piece of milk left behind after flowing - do you know what this white piece is?" There is a dark picture on the blackboard The starry sky map, the teacher pointed to a white thing that runs through the top and bottom and asked everyone. Corbeneira immediately raised his hand.Then, another four or five students raised their hands.Giovanni wanted to raise his hand too, but immediately put it down again.Indeed, he seemed to have read it in some magazine, and vaguely remembered that it was composed of countless stars.However, recently, Giovanni dozed off in the classroom every day, so he had no time to read and no books to read.So be confused about everything.

The teacher soon noticed. "Student Giovanni, you know that, right?" Giovanni stood up resolutely.However, when he stood up, he realized that he could not answer this question at all.Zanelli turned his head from the front seat, looked at Giovanni, and giggled. Giovanni was tongue-tied and flushed with embarrassment.Then the teacher spoke again: "When we take a closer look at the Milky Way with a large telescope, we will know what the Milky Way is, right?" But Giovanni still couldn't answer right away.After much deliberation, he still thought it was a star. The teacher was embarrassed, so he turned his eyes to Corbenela.

"Okay, then I invite Corbenela to answer." Corbenela, who was still so eager to raise her hand just now, stood up slowly and shyly at this moment, without making a sound for a long time. The teacher stared at Corbenela in amazement, then turned quickly to the blackboard and said: "Okay." Then he pointed to the star map and said, "Use a large high-powered telescope to observe this white Milky Way, and we will find countless small stars. Isn't that right, Giovanni?" Giovanni blushed and nodded.But there were tears in his eyes.Yes, I knew it all along, and Corbenera undoubtedly knew it too.It was written in the magazine that Cobenella and Cobenella had read together at the doctor's house, that is, at the house of Cobenella's father.

After reading the magazine, Corbenera went to his father's study to get a big thick book, opened the "Galaxy" part and introduced it to himself.The two of them admired for a long time the beautiful starry pictures that filled the dark pages.How could Corbenera forget these?He won't really be unable to answer.Recently, I have been working very hard every morning and afternoon, and I can't play with everyone at school, and I can't talk to Corbenela.Corbenela saw all this and kept it in his heart.He must be sympathizing with himself, so he deliberately pretended not to be able to answer.Thinking of this, Giovanni felt sorry for himself, and he also felt pitiful for Corbenela.

The teacher went on to tell: "Okay, if we regard the Tianhe River as a big river, then the small stars are equivalent to the pebbles and gravel at the bottom of the river. If we regard it as a piece of flowing milk, then it is even more It looks like a river. That is to say, all the stars are just like those tiny fat globules floating in the milk. If so, what is the water of this river? It is a 'vacuum'. This light is based on a certain The sun and the earth happen to be floating in the middle of it. That is to say, we all live in the water of the Tianhe River. Looking around from the water of the Tianhe River, you will find that the deeper the water, the bluer it becomes. , the farther the bottom of the Milky Way is, the denser the stars gather, so it looks white. Please look at this model.”

Pointing to the large double-sided convex lens with many shining sand grains inside, the teacher continued to say to the students: "The shape of Tianhe is just like this convex lens. We can regard each of these shining particles as a self-luminous planet like our sun. Our sun is roughly located in the center, and the earth is next to it. Classmates Ladies and gentlemen, please stand in the middle at night and observe the world inside this convex lens. This convex lens is thinner, and you can only see dots and dots of particles; while this glass crystal is thicker, you can see many sparkling crystals. Particles, that is, planets. Planets far away from our earth look white and hazy. This is the current theory about the Milky Way. So, I don’t have much time today about how big this lens is and how many amazing planet stories are in it Let’s talk about it in the next nature class. Tonight is the Milky Way Festival, so let’s go outside and observe the Milky Way in the sky! Well, this is the end of today’s class. Everyone, put away your books and notebooks.”

The classroom suddenly heard the sound of opening and closing the desk cover.The students saluted the teacher respectfully, and then ran out of the classroom in a swarm.