"Are the people here? The squad leader called." When Lang Tongguang saw that the people were almost there, he asked the squad leader to roll their names.

The leader of the military research class is Du Jun.

The oldest, the highest in the military, and the big brother of everyone, so when the military research class started, he naturally became the squad leader.

The deputy monitor is Zhao Anya.

Fang Yuan judged the arrangement of class cadres as entirely dependent on military rank.

Of course, Fang Yuan himself was very busy and was not interested in running for cadres.

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

"Stop! Stand at attention! Look to the right! Look forward! Report the number!" Du Jun shouted out a set of passwords, exactly the same as in the army.

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

Lang Tongguang waved his hand and said, "Okay, I'm teaching astrometry, not military training. Just click the number of people, relax, relax."

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

Du Jun turned his head and pointed his hand at his foot, and shouted, "Stand at attention! Who allowed you to go out?!"

"It's not... the professors say it's relaxing..." Niu Dazhi grumbled reluctantly.

"The professor let you relax, did he let you take a vacation?" Du Jun has been in the army for ten years. Discipline is carved into his bones, so he always takes care of everything.

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

"Today's class is related to the Star Beast Mother Planet, so it is a very important lesson for military research classes.

"Does any of you know where the star beast mother star is?"

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

"What galaxy is it called?" Lang Tongguang did not comment on this answer, and continued to ask.

"This..." Niu Dazhi was immediately dumbfounded, and quickly looked at Fang Yuan beside him, casting a cry for help.

Fang Yuan stood upright, not seeing him at all.

Eve snickered and said, "To make you feel better, half a bucket of water has to do it."

"Is there any classmate who can tell me?" Lang Tongguang knew that Niu Dazhi couldn't answer, and there was no danger to him, so he continued to look at others.

In fact, many students in the military scientific research class can answer this question.

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

In addition, Lang Xiaonian is Lang Tongguang's son. He has been fascinated since childhood and has a good background in astronomy, and he must know it.

However, no one raised their hands to answer.

Lang Tongguang simply called the name, pointed to Lang Xiaonian, and said, "You said it."

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

In the night sky, all the luminous stars seen are stars.

Planets that don’t shine are invisible.

Let alone planets outside the solar system, even the eight major planets in the solar system are difficult to see with an astronomical telescope.

Otherwise, it won't happen, the nine planets become eight planets.

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

"Since you can't see it, how do you know that the star beast's mother star is in Orion λ? Is it going through a space gap to go to the star beast world, send a signal, and when the signal reaches the earth, you will know the location of the star beast world. Right? "Niu Dazhi started asking questions again.

Eve covered her forehead and said silently, "Brother, can you not be so naive? The star beast planet is 1,000 light years away. A thousand light years, you are going to hibernate for a thousand years, and then rise to measure the star beast planet. Location?"

Niu Dazhi's eyes widened, and suddenly realized that it was true, his expression froze: "He...hehe..."

"In fact, it is like this. Go through the space gap to the star beast mother star, observe the position of the stars in the night sky, and then use the most dazzling stars as references to calculate the star system position where the star beast mother star is located. Observe the stars again to confirm the position.” After Lang Xiaonian opened the topic, he began to talk freely, and he really knew astronomy.

Lang Tongguang coughed and asked his son to stop, and then led the subject: "A good answer, the star beast mother star is indeed in the constellation λ Orion, 1055.5 light-years away from the solar system, and it is not wrong to round it to 1056 light-years.

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

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. This position was determined by Professor Yang and I after adjusting it overnight." Lang Tongguang immediately reminded him that a student had to turn the **** on the telescope.

"But I can't see anything, it's all black." The student frowned and expressed doubt.

Lang Tongguang smiled and said: "I couldn't see it originally. This position was calculated. In short, the position the telescope is facing is the position of the star beast planet. Because the distance is too far, it is really 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 glimmer. It is already inaccurate to say that the glimmer is already inaccurate, and it has reached the level that the naked eye can't distinguish."

"What do you think?" The students were speechless.

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

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

"This is the Star Beast Mother Star, it looks similar to other planets." A student stared at the screen and commented.

Lang Tongguang continued to lead the topic discussion: "So, who will tell me now, what is the point of observing the mother star of the star beast?"

Everyone began to discuss.

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

As soon as this idea came out, everyone immediately agreed.

"Yes. It was shot over a thousand years ago. The condition of the star beast planet we saw was the situation a thousand years ago, and the difference between the star beast planet and the star beast planet that we saw through the space gap is a thousand years away. It's amazing." A student suddenly felt very interesting and exclaimed.