"The star λ Orion, among the Chinese constellations, belongs to the first of the twenty-eight constellations, located above the middle of Betelgeuse and Betelgeuse, and has an apparent magnitude of 3.39 ......"

Lang Tongguang continued to talk about astronomy: "The apparent magnitude is the level of the stars visible to the naked eye, the smaller the value, the clearer it can see, and the larger the value, the darker the star.

"In a clear night sky, the apparent magnitude visible to the human eye is normally 6.

That is, the star lambda Orion is visible to the naked eye.

"However, if the night sky is clear, the modern night sky is worse, so sometimes it is not easy to see stars of magnitude 3.

"Let's continue to look at the computer-generated surface map of the star beast's home planet. This is what the star beast mother planet looked like a thousand years ago, let's see what's so special. ”

Fang Yuan carefully observed for a while and replied, "There is no Deep Wind Great Rift Valley. ”

Lang Tongguang nodded with satisfaction and said, "I remember that your military scientific research class has been to the Deep Wind Rift Valley, right?" That's right, on this planetary map, there is indeed no deep wind rift valley.

"The reason why there is no deep wind rift on the map is not that it cannot be photographed, but that there is no one in the first place. It can also be seen from this that the Great Rift Valley did not exist a thousand years ago, but was created later.

"Regarding the reasons for the formation of the Deep Wind Rift Valley, if you are interested, you can check the information yourself, and I will not talk about it here."

As for the reasons for the formation of the Deep Wind Rift Valley, the students of the military scientific research class who went to the Deep Wind Rift Valley know all about it.

The Deep Wind Rift Valley was crashed out of Rahu's Halo-class aircraft that descended on Civilization during a forced landing.

Regarding this content, there is also a secret level, which has not been declassified, so Lang Tongguang did not continue.

Next, Lang Tongguang explained some content about astrometry.

At 9:40 p.m., the end of class was announced.

After class, Fang Yuan met He Minghao again on the steps in front of the building.

"You must have been the only reason for me to join the military research class, right?" He Minghao took the initiative to speak.

"Well, I heard that." Fang Yuan replied casually.

"Neither the future of the country nor the fate of mankind should be put in the hands of one person, you should be able to understand that." He Minghao put his hands in his pockets and tried his best to express kindness, but there was still a sharp edge in his eyes.

"I'm just curious, the last time I went to listen to the report, it seemed that someone said that they didn't like to join the military before they entered the military research class, and now this is 'really fragrant'?" Fang Yuan grinned.

He Minghao frowned, although he could hear that he was ridiculing, but as the object of ridicule, he couldn't be happy.

Moreover, he did say that he did not want to join the army, so he did not enter the military scientific research class.

Now that I have entered the military scientific research class again, it is indeed really fragrant.

"The school leaders talked to me and sent me here. Of course, I did agree......"

He Minghao looked up at the sky and sighed: "Sometimes life can't come according to my own wishes, in fact, joining the army is indeed not my ideal state." But my elders and mentors thought that the country needed me, so I had to take on this responsibility. ”

"Then I wish you success, sincerely." Fang Yuan said with a smile.

"Fair competition. I think our goals should be the same. He Minghao raised his fist.

Fang Yuan could see that the other party was already graduating from college and was mature in thought, so he had no problem in his position, first on the side of the country, and then on the side of mankind.

In the general sense, the two sides are in agreement.

As for competition, in the era of crisis on the planet, who is stronger is the most correct choice.

The two sides exchanged light punches, then each turned to leave.

……

The next day.

The Planetary Defense Conference was held in the East China Sea.

The meeting will take place at the Tokai City Planetary Defense Council Building.

Two weeks ago, the Eastern Naval Academy of Sciences had released some evidence of the existence of a meteorite civilization, and it showed that the meteorite civilization had left a piece of information.

This is the third civilization that human beings know after encountering the Star Beast Civilization and the Parasey Soul Descending Civilization.

Moreover, this civilization left a message.

This news is earth-shattering news for all countries on the earth.

Therefore, this planetary defense conference was attended by almost all the countries that can be named.

The military scientific research class sat in the northeast corner of the conference hall, and most of the 38 people in the class came.

Fang Yuan's team of five formed a small group, and they had been talking quietly before the meeting began.

Delegates from various countries entered the venue one after another.

At ten o'clock.

Fang Zhenguo came to the stage on behalf of the headquarters, took a piece of information, put it on the podium, cleared his throat and began to say: "Delegates, welcome to the East China Sea and participate in this planetary defense conference......

After the opening remarks, a representative of another country asked aloud: "Two weeks ago, you released the news that there was once a civilization in the solar system, is there any evidence?" ”

"Don't worry, this meeting is held today, and that's what I'm talking about, everyone, please look at the big screen." Fang Zhenguo pressed the remote control of the presentation.

A star map was shown on the big screen, showing the solar system.

The star map of the solar system is clear to everyone, and it can be seen at a glance.

Fang Zhenguo shone a place with indicator rays and said: "Everyone should know that this is the asteroid belt of the solar system, where more than 600,000 asteroids have been discovered, and according to scientists' estimates, all the asteroids and cosmic dust will add up to more than 20 billion.

"The meteorite civilization we announced is in the orbit of an asteroid."

After saying this, it immediately caused a discussion on the scene.

Since this conference involved astronomy, delegations from various countries brought domestic astronomers with them.

After a moment of discussion, Koji Kawamura, the representative of the island nation, asked: "According to our astronomers, the total mass of all the asteroids in the asteroid belt is not as large as that of the moon, and it is impossible for that position to contain a civilization. ”

"What you know, I don't know?"

Fang Zhenguo glanced at him, blocked him back with a sentence, and then continued: "Regarding the speculation about whether there are planets in the asteroid belt, I don't want to repeat it, I will only talk about the key content of the meteorite civilization.

"The information left by the Meteorite Civilization shows that they were attacked by a higher civilization called the Cleanser Civilization, and it took ten days to leave this information before the civilization was destroyed.

This piece of information totals more than 20,000 words, recording the general situation of the meteorite civilization, as well as the process of being attacked by the Cleanser civilization, and finally leaving a warning.

"In the information left by the meteorite civilization, we can know that the meteorite civilization is a carbon-based civilization that lives in a terrestrial planet, and the orbit of this terrestrial planet is near the asteroid belt."