"In the geography class, there are astronomical phenomena such as solar terms, seasons, day and night, tides, auroras, polar day, polar night, etc., and at the same time, the concepts of the ecliptic, white path, celestial sphere, constellations, etc., will be taught in a deeper way, and it will ......"

"Wait...... You studied science in high school like me, right? At this time, when he was also in a trance, he suddenly interrupted Wu Bin and asked.

"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 had asked a stupid question, so he made a gesture of please.

"Well, that's what I shouldn't ask, you go ahead."

At this time, Wu Jiaqi suddenly raised his hand and said, "I almost understand it, so it means that we have actually been learning astronomy-related knowledge, but we don't realize it?" ”

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

Wu Jiaqi: "So it means that astronomy doesn't need to be separated into a separate discipline?" ”

"That's a long story, whether astronomy is a basic discipline or not has always been debated."

"Sounds like it's very complicated, huh......" Wu Jiaqi suddenly realized that things didn't seem to be as simple as she imagined.

"In fact, it is not very complicated, simply put, although astronomy is an independent science, physics, geography, and mathematics are more 'basic'."

"Just as meteorology is an independent subject, it also involves physics, geography, chemistry and mathematics, but there is also no separate course for it."

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

Hearing this, Wu Jiaqi nodded as if she didn't understand: "So astronomy is too complicated, so it is not included in the textbooks of junior and senior high schools?" ”

"What you're talking about is another point of contention." Wu Bin raised a finger and nodded, "There are also many people who support astronomy as a basic science, and think that according to the historical procedure of 'observing first, then explaining, and predicting', it is also suitable for teaching children." ”

"Another important fact that supports their faction is that there have always been independent courses in astronomy abroad, and the content of astronomy is detailed in the American teaching standard NGSS."

"Uh-oh." Although Wu Jiaqi didn't understand it very well, she still nodded vigorously unconsciously, "So in the end, it became a matter of national conditions?" ”

"I can't talk about it." Wu Bin shook his head, "It should be said that it is a matter of concept." ”

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

"But if you go up a little bit, it's like you're about to get involved in astrophysics, and the knowledge of celestial mechanics is as high as that, similar to the essence of gravity is geometric effects, and the limit of scale is Planck."

Seeing that Wu Jiaqi's expression seemed to be still very interested, Wu Bin thought for a while and asked, "Is it okay to test your question?" ”

"Huh!?" Wu Jiaqi trembled, "Will it be difficult?" ”

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

Wu Jiaqi touched his bangs after listening to this, and replied: "Before, I thought I should be regarded as a person who has learned about astronomy, but after listening to you today, I feel like I am ...... I just like to look at the stars. ”

And Pei Jiamin, who was sitting on the side, turned his head and tried his best to hold back himself from laughing.

She understands Wu Jiaqi's mood too well!

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

"Because ......" Wu Jiaqi couldn't help touching her bangs again, in fact, the answer popped out of her mind after listening to the question, but she felt that it couldn't be so simple, so she was very entangled for a while.

"It's really easy to speak up." Wu Bin encouraged.

Wu Jiaqi took a deep breath after hearing this, and replied cautiously: "Because the day is too bright?" ”

"That's right, that's the truth."

"Really!?" Wu 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 arcane puzzle.

"Well, but if you look into this carefully, there will be many new discoveries, such as the visibility of a star is determined by the star's distance from us and its ability to emit light."

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

"Huh!?" Wu Jiaqi exclaimed, "Is the sun's luminous ability only medium!?" ”

"yes." Wu Bin nodded.

"Oh my God, what kind of star is brighter than the sun?" Wu Jiaqi couldn't help but ask curiously.

"Twenty-two more than the arc, or you can call it another memorable name, the constellation Puppis, which is 790,000 times brighter than the sun."

"Real Fake ......"

This emotion was not issued by Gu Jiaqi, but Pei Jiamin, who was sitting on the other side.

But when Pei Jiamin found that Wu Bin turned his head to prove to her with a serious face, she hurriedly waved her hand and said, "I believe, I believe." ”

At this time, Gu Jiaqi, who had a little long reflection arc on the other side, finally exclaimed, "Mom...... 790,000 times, this has to blind us, right? ”

"Hahaha, indeed." Wu Bin smiled and nodded.

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

"There are many instruments that can test brightness, such as photomotor, and their principle is actually the same, that is, they receive light of different brightness and react differently."

"What kind of reaction?"

"To form a light spot, or to generate an electric current, for example, is to count the laughter of the light spot on the photographic negative, and then convert it into brightness."

Gu Jiaqi: "It's that simple? ”

"Of course, it's not that simple, all you get is the brightness of the instrument, and if you want to know the real brightness, you have to modify a lot of effects, such as the attenuation of light in the atmosphere, the attenuation of light by dust and gas in interstellar space, and the attenuation of the instrument itself."

"Oh~"

Gu Jiaqi, who was unconscious again, dragged out a long note again.

Wu Bin: "Okay, now let's go back to the original question. ”

"Huh? The first question? What's the problem? ”

Gu Jiaqi looked confused!