Chapter 262 The Brightness of the Sun

"In the geography class, there are astronomical phenomena such as solar terms, seasons, day and night, tides, aurora, polar day and polar night. At the same time, there will be further teaching on the concepts of the ecliptic, the ecliptic, the celestial sphere, the constellations, etc...."

"Wait a minute...you majored in science like me in high school, right?" At this moment, Wu Bin, who was also listening intently, suddenly interrupted and asked.

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

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

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

At this time, Gu Jiaqi suddenly raised her hand and said: "I almost understand it a little bit, so it means that we have actually been learning astronomy-related knowledge, but we just didn't realize it?"

"Yes, that's what I mean." Wu Bin nodded.

Gu Jiaqi: "So it means that there is no need to separate astronomy as 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 thought.

"It's actually not very complicated. Simply put, although astronomy is an independent science, the physics, geography, and mathematics that intersect with it are more 'basic'."

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

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

Hearing this, Gu Jiaqi nodded in understanding: "So astronomy is too complicated, so it is not included in the textbooks of middle and high schools?"

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

"In addition, the most important fact that supports their faction is that there have always been independent astronomy courses abroad. In the American teaching subject standard NGSS, the content of astronomy is regulated in detail."

"Oh." Although Gu Jiaqi didn't understand what he heard, she still nodded her head without realizing it, "So did it finally become a matter of national conditions?"

"It's impossible to 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, and the teaching of astronomy is a bit broken. The lower level is to teach what planets are in the solar system and what constellations are there."

"But as you go up a little bit, it seems that you will soon be involved in astrophysics. Advanced knowledge such as celestial mechanics is similar to the fact that the essence of gravity is a geometric effect, and the limit of scale is Planck."

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

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

"If you really understand astronomy as you said, it shouldn't be 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 about 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 current mood very 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 but touch her bangs. In fact, the answer popped into her head after listening to the question, but she felt it couldn't be that simple, so she was extremely confused for a while.

"Speak out boldly, it's really simple." Wu Bin encouraged.

After hearing this, Gu Jiaqi took a deep breath and answered cautiously: "Because it's too bright during the day?"

"Yes, that's the truth."

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

"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 ability to emit light is only moderate, but because it is so close to us, it becomes the only star visible during the day."

"Ah!?" Gu Jiaqi exclaimed, "The sun's ability to shine is only average!?"

"Yes." Wu Bin nodded.

"Oh my god, what kind of star is brighter than the sun?" Gu Jiaqi couldn't help but asked curiously.

"Ariyazen 22, or you can call it another name that is easier to remember, Puppis. It is 790,000 times brighter than the sun."

"real or fake……"

This sigh was not sent by Gu Jiaqi, but by Pei Jiamin sitting on the other side.

But when Pei Jiamin noticed that Wu Bin turned around to prove it to her seriously, she quickly waved her hands and said, "I believe it, I believe it."

At this time, Gu Jiaqi, whose reflection arc was a bit long on the other side, finally exclaimed, "Oh my god... 790,000 times. This will blind us, right?"

"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 felt that her world view had been greatly impacted.

"There are many instruments that can test brightness, such as photomotors. Their principles are actually the same, that is, they receive light of different brightnesses and react differently."

"What kind of reaction?"

"To form a light spot, or to generate an electric current, to 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 just 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 effect of the instrument itself on the atmosphere. attenuation and so on.”

"Oh~"

Gu Jiaqi, who was once again confused, made another long sound.

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

"Ah? The first question? What is the question?"

Gu Jiaqi was confused!