Chapter 746: Astrometry Course

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"Is everyone here? The squad leader will take a roll call." Lang Tongguang saw that the crowd was almost here, so he asked the squad leader to take a roll call.

The monitor of the military scientific research class is Du Jun.

He is the oldest, with the highest military rank, and is the big brother of everyone, so when the military scientific research class started, he naturally became the squad leader.

The deputy monitor is Zhao Anya.

Fang Yuan evaluated the arrangement of the squad cadres as completely depending on the military rank.

Of course, Fang Yuan himself is very busy and has no interest in running for class cadres.

Anyway, everyone knows what the purpose of the military scientific research class is, and in the end it depends on who has the biggest fist.

"Relax! Stand at attention! Look to the right! Look forward! Count!" Du Jun shouted out a set of passwords, exactly the same as when he was in the army.

After reporting the number, he turned to Lang Tongguang, saluted and reported: "There are 38 members in the military scientific research class, all of them are here, please give instructions from the professor."

Lang Tongguang waved his hand and said, "Okay, okay, I teach astrometry, not military training, just count the number of people, relax, relax."

When Niu Dazhi heard this, his standing posture immediately collapsed, and he walked out of the queue to find a chair to sit on.

Du Jun turned his head and pointed at his feet, and shouted: "Stand at attention! Who allowed you to come out?!"

"No...the professor said to relax..." Niu Dazhi grumbled reluctantly.

"The professor asked you to relax, did you give you a vacation?" Du Jun has been in the army for ten years, and the discipline is engraved in his bones, so he always does things in a strict manner.

Lang Tongguang was not from the army, so he was not so strict, he pressed his palm and said, "Okay, now the class begins.

"Today's class is related to the mother planet of the star beast, so it is a very important class for the military scientific research class.

"Does any of you know where the Star Beast Mother Planet is?"

Niu Dazhi's memory is still very good. He still remembered who told him before, and immediately raised his hand and said, "I know, it's 1,000 light-years away from the solar system. I remember this, and it must be true."

"What kind of galaxy is that called?" Lang Tongguang did not comment on this answer,

Continue to ask.

"This..." Niu Dazhi was stunned, he quickly looked at Fang Yuan beside him, and cast a look for help.

Fang Yuan stood up straight, pretending he didn't see it.

Eve snickered and said, "I'll make you pissed off, even if you're half a bucket full of water, you still have to show off."

"Is there any classmate who can tell me?" Lang Tongguang knew that Niu Dazhi couldn't answer, so he didn't put him in danger, and continued to look at the others.

In fact, in the military scientific research class, there are quite a few students who can answer this question.

Han Youwei, who likes to read, must know it.

In addition, Lang Xiaonian is the son of Lang Tongguang. He has been familiar with it since he was a child, and he has a good background in astronomy, so he must know it.

However, no one raised their hands to answer.

Lang Tongguang simply called the names, pointed to Lang Xiaonian, and said, "Say it."

Lang Xiaonian was a little helpless, and replied: "In λ Orion, 1056 light-years away from the solar system, the astronomical telescope can only see the stars, but not the planet where the star beast is."

In the night sky, all the glowing stars you see are stars.

Planets that do not emit light cannot be seen.

Not to mention the planets outside the solar system, even the eight planets in the solar system are difficult to see with astronomical telescopes.

Otherwise, it would not happen that the nine planets became eight planets.

In fact, when astronomers were looking for the eight planets in the solar system, they first estimated the orbital position of each planet according to the Titius-Bode rule, and then found the corresponding planet on the estimated orbit.

"Since you can't see it, how do you know that the star beast's mother star is in the λ Orion constellation? Did you go through the space rift, go to the star beast world, send a signal, and wait for the signal to reach the earth, then you will know the location of the star beast world. Right? "Niu Dazhi began to ask questions again.

Eve covered her forehead and said speechlessly: "Brother, can you be less naive? The star beast planet is 1,000 light years away from us. One thousand light years, you are going to hibernate until a thousand years later, and then get up to measure the star beast planet location?"

Niu Dazhi stared, and suddenly realized that this was the truth, his expression froze immediately: "Heh...hehe..."

"In fact, this is the case. Go through the gap in space, go to the star beast's mother star, observe the positions of the stars in the night sky, and then use the most dazzling stars as references to calculate the position of the star system where the star beast's mother star is located, and then Then observe the stars and confirm the position." After Lang Xiaonian opened the topic, he began to talk eloquently, and he really knew a lot about astronomy.

Lang Tongguang coughed, asked his son to stop, and then guided the subject: "That's a good answer, the mother star of the star beast is indeed in λ Orion, 1055.5 light-years away from the solar system, and it is correct to say that it is 1056 light-years rounded up.

"Okay, then, let's try to see if we can find the planet where the star beast is located in Lambda Orion."

A group of students gathered in front of the astronomical telescope and began to observe through the astronomical telescope.

"Don't move the position of the telescope. Professor Yang and I adjusted the position overnight." Lang Tongguang hurriedly reminded him when he saw a student wanting to turn the knob on the telescope.

"But I can't see anything, it's pitch black." The student frowned to express his doubts.

Lang Tongguang said with a smile: "I couldn't see it at first, but this position was calculated. In short, the position where the telescope is facing is the position of the star beast planet. Because the distance is too far, it is indeed invisible to the naked eye.

"However, if there is a computer to analyze the brightness, you can still find a little bit of very faint shimmer. It is not accurate to say that the shimmer is already to the extent that the naked eye cannot distinguish it."

"Then what do you think?" All the students were speechless.

"Okay, now look at the projector." Lang Tongguang clicked the remote control and released a picture on the projection wall.

"This is a computer-generated map of the planets, beasts, and planets. It was made last night, and the timeliness is good." Lang Tongguang said.

"This is the mother planet of the star beast. It looks similar to other planets." A student stared at the screen and commented.

Lang Tongguang continued to guide the topic discussion: "So, who will tell me now, what is the significance of our observation of the mother star of the star beast?"

Everyone started discussing.

Fang Yuan thought for a while, and answered first: "You can know the situation of the star beast world a thousand years ago, and guess what happened in the star beast world."

As soon as this idea was uttered, it was immediately approved by everyone.

"That's right. The light was shot over a thousand years ago. The situation of the star-beast planet we see is the situation of a thousand years ago. It is a thousand years different from the star-beast planet we saw through the space rift. Okay. It's amazing." A student suddenly felt very interesting and sighed.