Xueba's Sea of ​​Stars

Chapter 262 The Brightness of the Sun

"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 zodiac, white path, celestial sphere, and constellations will be taught in a deeper level, just..."

"Wait...you majored in science like me in high school, right?" At this time, he suddenly interrupted Wu Bin and asked when he was also listening.

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

Seeing Wu Bin's inexplicable expression, Pei Jiamin knew that she had asked a stupid question, so she made a gesture of please.

"Okay, I shouldn't ask, you continue."

At this time, Gu Jiaqi suddenly raised her hand and said, "I can almost understand it, so it means that we have been learning about astronomy all the time, but we just 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. Whether astronomy is considered a basic subject has always been controversial."

"It sounds very complicated..." Gu Jiaqi suddenly realized that things were not as simple as she imagined.

"Actually, it's not very complicated. To put it simply, although astronomy is an independent science, the intersecting physics, geography, and mathematics are more 'basic'."

"Just like 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 still focus on learning the basics, and such subjects that are not 'basic' may distract students."

Hearing this, Gu Jiaqi nodded half-understanding: "So it's because astronomy is too complicated, so it's not included in the textbooks for middle and high schools?"

"What you said is another controversial point of view." Wu Bin raised a finger and pointed, "There are also many people who support astronomy as a basic science, and believe that it follows the historical procedure of 'observe first, then explain, then predict' It is also suitable for teaching children."

"The most important fact to support their school is that there have always been independent courses of astronomy in foreign countries. In the American teaching subject standard NGSS, the content of astronomy is regulated in detail."

"Oh." Although Gu Jiaqi didn't understand it very well, she still nodded vigorously without knowing it, "So did it become an issue of national conditions in the end?"

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

"The current educational philosophy in our country is that the curriculum must consider the teaching content, but the teaching of astronomy is a bit faulty. The lower level is to teach which planets and constellations there are in the solar system."

"But if you go up a little bit, it seems that astrophysics will be involved soon. The high-level knowledge of celestial mechanics is similar to the essence of gravity is geometric effect, and the limit of scale is like Planck."

Seeing Gu Jiaqi's expression still seemed very interested, Wu Bin thought for a while and asked, "How about a question for you?"

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

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

After hearing this, Gu Jiaqi touched her bangs and replied: "I thought I should be considered a person who knows astronomy before, but after listening to what you said today, I feel like... I just like to watch the stars."

Pei Jiamin, who was sitting next to him, turned his head and tried hard not to laugh out loud.

She understands Gu Jiaqi's mood so well!

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

"Because..." Gu Jiaqi couldn't help touching her bangs again. In fact, the answer came to her mind after listening to the question, but she felt that it was impossible to be so simple, so she was very entangled for a while.

"It's really easy to speak out boldly," Wu Bin encouraged.

Gu Jiaqi took a deep breath after hearing this, and replied cautiously: "Because it's too bright in the daytime?"

"Yes, that's the truth."

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

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

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

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

"Yes." Wu Bin nodded.

"My God, what kind of star is brighter than the sun?" Gu Jiaqi couldn't help asking curiously.

"Argon 22, or you can call it another easy-to-remember name, Puppis, its brightness is 79 times higher than that of the sun."

"real or fake……"

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

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

At this time, Gu Jiaqi, who had a long reflex arc on the other side, finally exclaimed, "Oh my god... 79 times, this must make us blind?"

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

"It's amazing! Then how was the brightness measured? I really can't believe it." At this moment, Gu Jiaqi felt that her world view had been greatly impacted.

"There are many instruments that can measure brightness, such as photoelectric motors. Their principles are actually the same, that is, they receive light of different brightness and respond differently."

"What kind of reaction?"

"To form a light spot, or to generate an electric current, if you take the light spot as an example, it is to count the size of the light spot on the photographic film, and then convert it into brightness."

Gu Jiaqi: "Is it that simple?"

"Of course it's not that simple. What you get in this way is only the brightness of the instrument. If you want to know the true brightness, you have to modify many effects, such as the attenuation of light by the atmosphere, the attenuation of light by dust and gas in interstellar space, and the influence of the instrument itself attenuation and so on.”

"Oh~"

Gu Jiaqi, who was not aware of it again, dragged out another long tone.

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

"Huh? The first question? What question?"

Gu Jiaqi was stunned!
(End of this chapter)