Scholar’s Starry Sea

"In the geography class, there are astronomical phenomena such as solar terms, seasons, day and night and tides, aurora, polar day, and polar night. At the same time, concepts such as the ecliptic, the white path, the celestial sphere, and constellations will be discussed. For a deeper level of teaching, just..."

"Wait...your high school is the same science as me, right?" At this time, Wu Bin suddenly interrupted when he heard his mind.

"Yes, but that doesn't mean I can't study liberal arts, right?"

Looking at Wu Bin's inexplicable expression, Pei Jiamin knew that he was asking a fool. Question, so he said with a please gesture.

"Well, I shouldn’t ask, you continue."

At this time, Gu Jiaqi suddenly raised her hand and said: "I almost understand it, so it means we In fact, I have been learning astronomy related knowledge, but we didn't realize it?"

"Well, that's what it means." Wu Bin nodded.

Gu Jiaqi: "So there is no need to separate astronomy into a separate subject?"

"This is a long story. Does astronomy count as a basic subject? In fact, this point has always been controversial."

"It sounds like a very complicated look..." Gu Jiaqi suddenly realized that things didn't seem to be as simple as she thought.

"In fact, it is not very complicated. Simply put, although astronomy is an independent science, the Physics, Geography, and Mathematics that intersect with it are more'basic'. "

"Just as meteorology is an independent subject, it also involves Physics, Geography, Chemistry, Mathematics, but there is also no separate course for it."

"After all, primary and secondary schools are still based on the basics of learning. Such subjects that are not'basic' may distract students."

I heard this nodded, who seemed to understand Gu Jiaqi: "So it is astronomy. It’s too complicated, so it’s not included in the middle and high school textbooks?"

"What you said is another point of contention." Wu Bin put up a finger and pointed, "There are also Many people support astronomy as a basic science, and believe that the historical procedure of'observing first, explaining, predicting' is also suitable for teaching children."

"In addition, they support one of the most important facts of this school. That is, there have always been independent courses in astronomy abroad. In the American teaching standard NGSS, the content of astronomy has been regulated in detail."

"Oh oh." Although Gu Jiaqi does not understand well, she still doesn't understand. Feeling nodded, "So did it finally become a problem of national conditions?"

"It can't be discussed." Wu Bin shook his head, "It should be said that it is a problem of concepts."

"China’s current educational philosophy is that the curriculum must consider the content of the teaching, and the teaching of astronomy is a bit faulty. The lower one is to teach which planets in the solar system, which constellations are there, and so on."

" But going up a little bit, it seems that Physics of celestial bodies will be immediately involved. The knowledge of celestial mechanics is similar to the essence of gravitation is geometric effect, and the limit of scale is Planck. This kind of."

Looking at Gu Jiaqi’s expression still seemed very interested, Wu Bin thought for a while and asked: "Is it OK to test you on a question?"

"Ah! Gu Jiaqi trembled, "Will it be difficult?"

"If you really know astronomy as you said, it shouldn't be difficult." Wu Bin said with a smile.

After listening, Gu Jiaqi touched her bangs and replied: "In the past, I think I should be a person who has understood astronomy, but after listening to you today, I feel like I... just like watching the stars. That's it."

And Pei Jiamin, who was sitting at the side, turned his head and tried to hold back his laughter.

She really understands Gu Jiaqi's mood now!

Wu Bin: "Don't be afraid, it's very simple. Listen, why can't stars be seen during the day?"

"Because..." Gu Jiaqi again Can't help but touch her bangs. In fact, after listening to the question, she popped out the answer in her head, but she also felt that it was impossible to be so simple, so she struggled for a while.

"It's really easy to say it boldly." Wu Bin encouraged.

After Gu Jiaqi listened to took a deep breath, cautiously replied: "Because the day is too bright?"

"Yes, that's the truth."

" Really!?" Gu Jiaqi almost jumped up from the sofa. Although she had only answered a very simple question correctly, she felt as if she had solved some Mathematical puzzle.

"Well, but if you study this issue carefully, you will have many new discoveries. For example, the visibility of a star is determined by the distance between the star and us and its luminous ability. ."

"For example, the sun's luminous ability is actually only moderate, but because it is close to us, it becomes the only visible star during the day."

"Ah! Gu Jiaqi exclaimed, "Is the sun's luminous ability only moderate!?"

"Yes." Wu Bin nodded.

"Gosh, what kind of stars are brighter than the sun?" Gu Jiaqi couldn't help but curiously asked.

"Arc is increased by twenty-two, or you can call it another easy-to-remember name, Pupae. Its brightness is 790,000 times higher than that of the sun."

"It's true..."

This sentence was not from Gu Jiaqi, but Pei Jiamin, who was sitting on the other side.

But when Pei Jiamin found Wu Bin turned her head to prove to her seriously, she waved her hand quickly and said: "I believe, I believe."

And this When the reflection arc on the other side was a little long, Gu Jiaqi finally exclaimed, "Oh, 790,000 times, does this make us blind?"

"hahaha, it is indeed possible." Wu Bin nodded with a smile.

"That's amazing! How was this brightness measured? I really can't believe it." At this moment, Gu Jiaqi is feeling that her world view has been greatly impacted.

"There are many instruments that can test brightness, such as photoelectric motors. They all have the same principle, that is, they receive light of different brightness and make different reactions."

"What kind of reaction?"

"The formation of a light spot, or the generation of electric current, to take the light spot as an example, is to count the size of the light spot on the photographic film, and then convert it to brightness."

Gu Jiaqi: "It's that simple?"

"Of course it's not that simple. What you get is just the brightness of the instrument. If you want to know the real brightness, you have to modify many effects, such as the influence of the atmosphere on the light. The attenuation of light, the attenuation of light by the dust and gas in the interstellar space, and the attenuation of the instrument itself on the walk, etc."

"Oh~"

Gu Jiaqi, who is unclear again There was a long tone.

Wu Bin: "Alright, let's go back to the first question now."

"Huh? The first question? What is the problem?"

Gu Jiaqi looked confused!