When the old cat revisited Comet Tomcat-Tang-Mai 1 the next night, the star became brighter again, and the comet was flying extremely fast - it was probably the fastest moving object in the solar system, traveling more than 70 kilometers per second, compared to 20 kilometers per second for an ordinary asteroid.

At the same mass, the comet carries thirteen times more energy than the asteroid that extinct the dinosaurs at the end of the Cretaceous period, and if Comet Tomcat-Tang-Mai 1 did crash headlong into the arms of Mars, the catastrophic consequences would be far more spectacular than the fifth mass extinction on Earth.

Mars is much smaller than Earth, and comets have enough energy to throw a large amount of material into orbit, which will create a huge crater on the surface of Mars, and form a belt of gravel, from which Mars will also have a sparse ring.

Of course, it will be impossible for Tang Yue and Mai Dong to see this scene at that time, the old cat-Tang-Mai No. 1 comet will come from above the ecliptic plane of the solar system, and it will definitely crash into the northern hemisphere of Mars, and the Kunlun station may be destroyed at the moment of impact, and the space station will be torn apart by the ejected debris.

"How? Which is a comet? Tang Yue asked.

The old cat shifted his position and pointed to Tang Yue on the monitor.

On the screen is a starry sky, a picture taken by the Survey Telescope on the United Space Station, which has been tracking the comet that broke into the solar system.

Slightly to Tang Yue's surprise, the old cat's paw pointed to a very dim small point of light, which was inconspicuous among the bright stars, which was not the same as the comet in Tang Yue's impression.

He thought he would see a bright broom star.

"It's a pity that the Dawn module of the space station is damaged, otherwise we could use a telescope with a larger aperture and higher accuracy, so you can see more clearly." "This is Comet Tomcat 1, which is heading towards the sun at high speed, and in the three minutes you have been staring at the screen, it has already flown over a distance of more than 12,600 kilometers." ”

Tang Yuemo rubbed his chin.

If it was in ancient times, this comet would probably be labeled as a "demon star from the sky, a bad omen", both at home and abroad, the ancient people had a bad impression of the comet, the Chinese called it a broom disaster star, representing bad luck, while Westerners believed that it was God's dissatisfaction and anger.

After all, anyone who knows that there's a huge thing looming over their head is uneasy, whether it's a nuclear warhead or a comet.

A whimsical thought suddenly popped into Tang Yue's mind, "Old cat, you say, is this thing possible as an interstellar missile?" An ultra-long-range strike weapon made by some kind of extraterrestrial civilization, it flies so fast, it really looks like a missile...... Do you think it looks like it? ”

"Not really." The old cat glanced at him and shook his head, "According to the results of spectral analysis, more than 95% of the structure of this thing is water, and the remaining components are carbon dioxide, nitrogen, ammonia and methane, these substances will evaporate quickly once they are close to the sun, if it is a missile, I think it must have at least an iron tungsten core, or a three-phase bomb." ”

"So it's actually an interstellar water courier?"

"Yes." The old cat nodded, "A considerable part of the water on the earth may come from comets, billions of years ago, before life was born, a large number of asteroids and comets hit the earth, bringing all kinds of rare metals and water, and even organic molecules. ”

"If it can land on Mars, I'm just saying what if...... Without affecting the Kunlun station and the space station...... Do we have enough water to replenish it? We can't use up all this water in a lifetime. ”

"No way, what's going on in your head? Do you think it will form a lake or an ocean when it crashes down? The old cat shook his head, "All the water contained in the Hui Core will instantly evaporate in the high heat of the impact, and all of it will melt into the atmosphere of Mars, and you will not be able to get a drop of water, of course, such a little bit of water will not make the atmosphere of Mars moist, which is equivalent to pouring a bottle of mineral water in the middle of the Sahara Desert." ”

"I'm just thinking about it." Tang Yue pouted.

"The only way to get water from the comet......"

"What is it?" Tang Yue asked.

"It's you flying up and stopping it, like the Deep Impact." The old cat replied, "Then you can take as much water as you want." ”

When the old cat says such fairy words, it proves that it is quite impatient with your stupidity.

"Has this thing's orbit been calculated?"

The old cat shook his head, "It's still being observed." ”

Tang Yue knew that it was impossible for the comet to hit Mars...... The probability of these two celestial bodies colliding is smaller than that of a bullet hitting a bullet, but he still can't help but worry, Tang Yue in the past would definitely not worry about a comet, of course, it was not his turn to worry, but since the earth disappeared, the universe has become a dangerous place in Tang Yue's eyes, and the originally empty dark night sky seems to be hidden with fierce beasts.

Since it can swallow the earth in one gulp, it is not inconceivable to spit on a star and drown you.

"Mr. Cat?"

"Miss Mai Dong, is the light sensor of the S1 battery pack still working properly?"

"The solar panels are working fine, and the light sensor is in good condition." Mai Dong replied, "The repair work was very successful. ”

Mai Dong's mission out of the cabin has been successfully completed, she has replaced the damaged wiring very smoothly, and Tang Yue also praised her for her talent as an electrician.

The old cat pouted, dismissive.

When an electrician asks for a talent for yarn.

To be an electrician is to be talented.

"Mr. Cat, here are some of the brief biographies of several people in the history of European science and technology and agriculture, as well as the history of Western philosophy." Maidon sent the document to the old cat, "I have St. Augustine, Thomas Aquinas, Leibniz, and Descartes here. ”

"Hmm......" the old cat glanced at it, "Tang Yue, have you finished tidying up over there?" ”

"Almost, but Pythagoras and Democritus, are you going to put them in the history of philosophy, or in the history of science?"

The old cat thought for a moment, "History of philosophy." ”

"After all, the earliest science was natural philosophy." "Philosophers are also scientists. ”

"But Aristotle is a big villain in a middle school physics textbook." Tang Yue said, "Almost every class has to be pulled out and criticized. ”

"The next person is Francis Bacon...... Ah no, bacon. ”

"Next up are Nicola and Bruno."

"Further down to Copernicus, Kepler and Galileo...... These people are mainly placed in the history of science, and the philosophers worth mentioning at this stage should be Barclay and Spinoza. ”

The old cat chattered.

They are sorting out and recording the history of science and philosophy, making biographies of famous people in history, science and philosophy are listed as separate histories, juxtaposed with the chronicles of human civilization, so that the records can be more organized, in addition, the development of agriculture and industry is also organized into separate books, from slash-and-burn cultivation to the use of chemical fertilizers, from the first industrial revolution to the birth of semiconductors, the history of mankind slowly flows through this small scientific research station.

Immanuel Kant...... And Hegel. ”

"This man is Schopenhauer!"

"Don't show up here for Freud, talk about him when you write about psychology, don't forget Nietzsche, hear no Miss Maidon...... Nietzsche was not in the right age. ”

"Damn, I told you about Tang Yue last time, Marx is not from the Soviet Union!"