“Professor, it shouldn’t be our body carries the microorganisms on the meteorite, right? I have never touched that meteorite.”

Niu Dazhi rubbed his clothes with his hands, there is a kind of self The illusion of being unclean.

Lu Xiuwen said in an easy-going tone: “Don’t be nervous, I ask you to come back for testing, just to make sure that the microorganisms in the meteorite have not spread out.

“In theory, you should It is not contaminated with these microorganisms, and testing is only a routine matter. “

While several people were talking, a professor of astronomy from the University of Aerospace Science and Technology brought two graduate students over to communicate with Lu Xiuwen.

Because the meteorite came from outer space , So it involves the field of astronomy.

“Professor Lu, this is an order from the headquarters. I am responsible for astronomical research on this meteorite. “The professor of astronomy from the University of Aerospace Science and Technology stepped forward to shake hands with Lu Xiuwen.

“Hello, hello, welcome, Professor Lang, please sit first, please sit first. “Lu Xiuwen shook hands with him and invited him to sit down.

The name of this astronomy professor is Lang Tongguang, and he is also an important figure in the domestic astronomy community.

Because of Star With the emergence of the Beast world, astronomy has been a hot topic in recent decades.

Fang Yuan feels that Professor Lang Tongguang is a bit familiar, as if he has seen it in the TV news.

After the two of them were polite, Lang Tongguang asked directly: “When can I see that meteorite? “

“We are doing microbiological protection. After the protection is completed, you can go to see it. It will take about an hour, can Professor Lang wait? “Lu Xiuwen took a look at the time on the watch.

An hour is not too long. Lang Tongguang also applied to the headquarters after learning that microorganisms were found in the meteorite. He knew that the meteorite contained microbes. Microorganisms may come from other planets, which has important research value for astronomy.

Next.

The crew of the Divine Boat successively carried out microbiological tests and confirmed that there was no After the question, they were allowed to go home.

Fang Yuan and several people were not at all. When they saw Lu Xiuwen and Lang Tongguang discussing about meteorites, they went over and listened.

About an hour later, a researcher came over and reported to Lu Xiuwen: “Professor, the protection work is complete. “

“Can I go to see a meteorite?” “Lang Tongguang is a little impatient.

After all, this is a meteorite with microorganisms. It is most likely from another planet with life. This is a major breakthrough for astronomy research.

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Before that, humans had discovered microbial fossils in meteorites hundreds of thousands of years ago, but they had never found living microbes.

This time, it was really in meteorites. The excitement in Lang Tongguang’s heart was indescribable when he found living microorganisms.

Fang Yuan followed to see the meteorite.

The entire group went to the laboratory where the meteorite was stored, After putting on the protective clothing, I walked in and watched the meteorite up close.

The meteorite is still the meteorite.

Fang Yuan not only saw it, but also touched it.

However, when I see this meteorite again, I feel completely different.

The shape has not changed, but when I first saw it, I didn’t know that there were microorganisms in it.

Now, when I saw this meteorite again, I knew that there were microorganisms that might come from outside the planet. This feeling is very subtle.

This meteorite is very large. It is about five meters in diameter and has an irregular shape.

Naked eye looks like this meteorite is a rock with high mineral content, not at all special places.

From the elementary analysis point of view, the main elements are iron and silicon, and there is nothing surprising.

“Professor Lang, are the microorganisms on this meteorite really alien? “Eve looked up and down curiously and asked a question.

“Not sure yet. However, this star should not be called a meteorite. According to the information found, it is actually an asteroid. “Lang Tongguang corrected.

“Asteroid?” Can five meters count as an asteroid? “Everyone was a little surprised.

Because this stone, if it is regarded as a meteorite, it is considered large, but if it is regarded as an asteroid, it is too small.

“Yes According to the rules of asteroids, stars with a diameter of more than three meters and less than 300 kilometers are called asteroids. Although this star is small, it does meet the standards of asteroids. “Lang Tongguang confirmed.

Fang Yuan blinked his eyes and said, “You mean, this stone orbits the sun?” “

“Yes, this asteroid is a near-Earth asteroid. Although it is small in size, humans have actually discovered it because the orbit is very close to Earth…”

Lang Tongguang began to explain in astronomy: “If this asteroid is not brought back by you, every time it orbits the sun, when it approaches Earth, it will be affected by Earth’s gravity, making its orbit small. With the deflection of the angle, there is a possibility of hitting Earth in the future.

“However, because this asteroid is so small, even if it falls into Earth, it will not cause disaster, so the astronomy community not at all issued a warning.

“In fact, An asteroid of 5 to 10 meters like this will enter Earth’s atmosphere every year on average.

“The energy released is roughly equivalent to the equivalent of an atomic bomb, but most branches are vaporized in the atmosphere, so it will not have much impact on Earth.”

Several people didn’t expect that such a five-meter-diameter stone turned out to be an asteroid, and they were all a little surprised.

Fang Yuan asked curiously: “So how big an asteroid will fall into Earth to cause disaster?”

“Asteroids with a diameter of about 50 meters hit an average of 1,000 years Earth once produced an explosion equivalent to the Tunguska explosion at the beginning of the 20th century. An asteroid of this order of magnitude hits Earth, Earth can still bear it, and the problem will not be too serious if it exceeds 100 meters. If the diameter of the asteroid reaches a thousand Rice, that will cause a devastating disaster.” Lang Tongguang patiently answered several people’s questions.

“Are there many asteroids like this?” Fang Yuan asked.

“At present, the number of asteroids discovered by humans in the solar system is 120,000.”

Lang Tongguang continues to popularize science: “However, most of the asteroids The orbits of asteroids are between the orbits of fire star and Jupiter. That is, most of them are in the asteroid belt.

“The orbits of the asteroid belt are in the orbits of fire star and Jupiter. between.

“In the solar system, the planet closest to the sun is Mercury, followed by Venus, and then Earth.

“The fire star is in the outer circle of the Earth orbit, outside the fire star orbit , Is the asteroid belt, and then Jupiter. “


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