Chapter 703: Turns Out to Be an Asteroid

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"Professor, we shouldn't carry the microorganisms on the meteorite, right? I haven't even touched that meteorite."

Niu Dazhi stroked the clothes on his body with his hands, and had the illusion that he was no longer clean.

Lu Xiuwen said in an easy-going tone: "Don't be nervous, I asked you to come back for testing just to make sure that the microorganisms in the meteorite didn't spread out.

"Theoretically, you should not be contaminated with these microorganisms, and testing is just a routine."

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

Since this meteorite comes from outer space, it involves the field of astronomy.

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

"Hello, hello, welcome, Professor Lang, please sit down first, please sit down first." Lu Xiuwen shook hands with him while asking him to sit down.

This astronomy professor is named Lang Tongguang, and he is also an important figure in the domestic astronomy circle.

Due to the emergence of the star beast world, astronomy has been popular in recent decades.

Fang Yuan felt that Professor Lang Tongguang looked familiar, as if he had seen it on TV news.

After the two of them finished their courtesies, Lang Tongguang asked directly, "When can I see that meteorite?"

"We are working on the protection of microorganisms. After the protection work is completed, we can go to see it. It will take about an hour. Can Professor Lang wait?" Lu Xiuwen looked at the time on his watch.

An hour is not too long. Lang Tongguang also applied to the headquarters after he learned that microorganisms were found in the meteorite. He knew that the microorganisms in this meteorite might come from other planets, which is of great research value for astronomy.

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The crew of Shenzhou carried out microbiological tests one after another, and after confirming that there was no problem, they were allowed to go home.

Fang Yuan and the others did not leave, seeing Lu Xiuwen and Lang Tongguang discussing about meteorites, they leaned over to listen.

After about an hour,

A researcher came over and reported to Lu Xiuwen: "Professor, the protection work is complete."

"Is it time to see the meteorite?" Lang Tongguang was a little impatient.

After all, this is a meteorite with microorganisms, and it is very likely that it came from another planet with life. This is a major breakthrough for astronomical research.

Prior to this, humans had found fossils of microorganisms in meteorites hundreds of thousands of years ago, but never found living microorganisms.

This time, living microorganisms were found in the meteorite, and the excitement in Lang Tongguang's heart was indescribable.

Fang Yuan and the others followed to see the meteorite.

A group of people walked to the laboratory where the meteorite was stored, put on protective clothing, and then walked in to watch the meteorite up close.

The meteorite is still the meteorite.

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

However, when I saw this meteorite again now, it felt completely different.

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

Now, when I see this meteorite again, I know that there are microorganisms that may come from extraterrestrials in it. This feeling is very subtle.

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

To the naked eye, this meteorite is a stone with a high mineral content, and there is nothing special about it.

From the elemental analysis, the main elements are iron and silicon, and there is nothing surprising about it.

"Professor Lang, are the microorganisms on this meteorite really aliens?" 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 be considered an asteroid?" Everyone was a little surprised.

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

"Yes, according to the rules of asteroids, any star with a diameter of more than three meters and less than 300 kilometers is called an asteroid. Although this star is small, it does meet the standard of an asteroid." Lang Tongguang confirmed.

Fang Yuan blinked his eyes and said: "You mean, this stone revolves around the sun?"

"Yes, this asteroid is a near-Earth asteroid. Although it is small in size, humans have actually discovered it because of a part of its orbit that is very close to the earth..."

Lang Tongguang began to explain in terms of astronomy: "If this asteroid has not been brought back by you, every time it orbits the sun, it will be affected by the gravity of the earth when it approaches the earth, causing the orbit to deflect at a small angle. , there is a possibility of hitting the earth in the future.

"However, because this asteroid is too small, even if it falls into the earth, it will not cause disaster, so the astronomy community did not issue an early warning.

"In fact, an asteroid with a size of five to ten meters like this will enter the earth's atmosphere on average once a year.

"The energy released is about the equivalent of an atomic bomb, but most of it will be vaporized in the atmosphere, so it won't have a big impact on the earth."

None of them thought that such a five-meter-diameter stone would be an asteroid, and they were a little surprised.

Fang Yuan asked curiously: "Then how big an asteroid needs to fall into the earth to cause a disaster?"

"An asteroid with a diameter of about 50 meters hits the earth once every thousand years on average, and the explosion produced is equivalent to the Tunguska explosion at the beginning of the 20th century. The earth can still bear the impact of an asteroid of this order of magnitude. It won't be too serious. If the diameter of the asteroid reaches 1,000 meters, it will cause a devastating disaster." Lang Tongguang patiently answered the questions of several people.

"Are there many asteroids like this?" Fang Yuan asked.

"Currently, the number of asteroids that humans have discovered in the solar system has been named 120,000."

Lang Tongguang continued popular science: "However, the orbits of most asteroids are between the orbits of Mars and Jupiter. That is, most of them are in the asteroid belt.

"The asteroid belt orbits between the orbits of Mars and Jupiter.

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

"Mars is in the outer circle of the earth's orbit, beyond the orbit of Mars, there is the asteroid belt, and then there is Jupiter."

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