"Are you all here? The squad leader called the name. Lang Tongguang saw that the people were almost here, so he beckoned the squad leader to take a roll call.

The squad leader of the military scientific research class is Du Jun.

The oldest, the highest military rank, is the big brother of everyone, so when the military scientific research class opens, he naturally becomes the squad leader.

The deputy squad leader is Zhao Anya.

Fang Yuan evaluated the arrangement of the squad cadres as completely based on military ranks.

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

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

"Take a break! Attention! Align with the right! Look forward! Count! Du Jun shouted out a set of passwords, exactly the same as when he was in the army.

After finishing the report, he turned to Lang Tongguang and saluted and reported: "There are 38 people in the military scientific research class, all of them are here, please ask the professor for instructions." ”

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 around and stretched out his hand to point to his feet, and shouted: "Stand up!" Who allowed you to be out of the ranks?! ”

"It's not...... The professors all said that relaxation ......," Niu Dazhi muttered reluctantly.

"The professor made you relax, did he let you take a vacation?" Du Jun has been in the army for ten years, and discipline is engraved in his bones, so he always does things with a clear look.

Lang Tongguang is not from the army, so he is not so strict, presses his palm, and says, "Okay, now the class will begin."

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

"Do any of you know where the Star Beast's home planet is?"

Niu Dazhi's memory is still very good, and he still remembers who told him before, so he immediately raised his hand and said: "I know, 1000 light years away from the solar system, I remember this, it must be right." ”

"What kind of galaxy is that?" Lang Tongguang did not comment on this answer, and continued to ask.

"This ......" Niu Dazhi was suddenly stunned, and hurriedly looked at Fang Yuan beside him, casting a look for help.

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

Eve snickered, "Let you get shy, half a bucket of water still has to be successful." ”

"Can any of you tell us about it?" Lang Tongguang knew that Niu Dazhi couldn't answer, so he didn't endanger him, and continued to look at the others.

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

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

In addition, Lang Xiaonian is the son of Lang Tongguang, who has been exposed to it since he was a child, and has a good background in astronomy, and he must know it.

No one raised their hand to answer, though.

Lang Tongguang simply named him, pointed at Lang Xiaonian, and said, "You say." ”

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

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

Planets that don't shine are not visible.

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, there would not be a thing where the nine planets become the 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 in the speculated orbit.

"Since you can't see it, how do you know that the star beast mother planet is in Orion λ? Is it through the spatial rift, 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 began to ask questions again.

Eve covered her forehead and said speechlessly: "Big brother, can you not be so naïve?" The planet Star Beast is 1,000 light-years away. A thousand light years, are you going to hibernate until a thousand years later, and then get up to measure the position of the Star Beast planet? ”

Niu Dazhi's eyes widened, and he suddenly found that this was indeed the case, and his expression suddenly froze: "Heh...... Hehe......"

"Actually, this is the case, through the spatial rift, to the star beast home star, observe the position of the stars in the night sky, and then use the most dazzling stars as a reference, you can calculate the position of the star system where the star beast parent star is located, and then observe the stars to 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 star beast mother planet is indeed in the constellation Orion, which is 1055.5 light-years away from the solar system, and it is not wrong to round it up to say that it is 1056 light-years."

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

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

"Don't move the position of the telescope, this position was determined by me and Professor Yang overnight." Lang Tongguang saw that some students were about to twist the knob on the telescope, and hurriedly reminded him.

"But I can't see anything, it's pitch black." The student frowned in confusion.

Lang Tongguang said with a smile: "Originally, I couldn't see it, this position was calculated by calculation, in short, the position of the telescope is the location of the star beast planet, because the distance is too far, it is really invisible to the naked eye."

"However, if a computer analyzes the brightness, it can still find a little bit of faint light. It is inaccurate to say that it is a glimmer, and it has reached the point where it is impossible to distinguish it with the naked eye. ”

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

"Okay, now look at the projector." Lang Tongguang pressed the remote control and put out a picture on the projection wall.

"This is a map of the planets of the star beasts made by the computer, which was made last night, and the timeliness is still good." Lang Tongguang said.

"This is the star beast home planet, it looks like any other planet." One of the students commented as he stared at the screen.

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

The crowd began to discuss.

Fang Yuan thought for a moment and took the lead in replying, "You can know the situation in the Star Beast World a thousand years ago, and guess what happened in the Star Beast World. ”

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

"That's right. Just shot over a thousand years ago, the situation of the Star Beast Planet we see is the situation of a thousand years ago, and the difference between the Star Beast Planet seen through the space rift is a thousand years, so amazing. One of the students suddenly felt very interesting and sighed.