The feeling of depression in his heart became stronger and stronger, and Thomson didn't even have time to respond to Thomas, so he calculated it on the computer. This is the keen intuition of a top scientist, who has a hunch that a crisis is brewing, and a catastrophe that no one expects is quietly happening......

Ten fingers quickly twilt on the keyboard and list all kinds of equations: kinetic energy formula, friction formula, aerodynamics, fluid mechanics, and gravitation......

Soon, the formulas were all organized on the screen, and after hitting enter, the computer began to calculate, and Thomson's breathing began to become heavy, and he felt some blackness in front of his eyes, faint signs of fainting.

The supercomputer was running very fast, and it only took less than a second for the results to come out, and in an instant, he felt his heart being pinched by a big hand, and his face was pale and terrible. He wished he had miscalculated......

"Mentor, look at the ice I've collected!" His student, Thomas, ran into the lab with a piece of plastic wrap in his hand, and when he saw Thomson working, he immediately stopped talking.

Mentor Thomson was a very strict person, and he would be criticized for interrupting his work. No one likes to be interrupted at work.

Since the explosion of the earth, both of them have lost their loved ones, and the normal teacher-student relationship has become much closer, and Thomson's mentor has become more and more strict with him.

Regardless, Thomas always felt a little bit of love in these strict demands. Perhaps, they are already the most familiar people with each other.

"Thomas, come and see if I'm right." Thomson was afraid that he had miscalculated, so he said in a tired tone.

This time, he re-worked it on the computer, and each formula was written step by step, which took a long time. In fact, according to the usual level, these simple deductions simply did not take so long, as if these few lines of formulas took him a lifetime of effort.

"It's ......"

Thomas didn't notice that something was wrong with Thomson's expression, he looked at it curiously for a moment, and the genius brain quickly reacted, "Oh...... Forehead...... I see, you're calculating how far a ball moving at high speed can fly in the air? Well...... There should be nothing wrong with the calculation process. Ah, this is ......"

Seeing those familiar parameters, Thomas suddenly thought of a possibility, his eyes widened, and his whole body trembled. He rubbed his eyes, looked again, and found that he was not mistaken, and the trepidation in his heart could hardly be described in words, and he sat down on the ground and met Thomson's gaze.

"Has God forsaken us?!"

……

Yu Yifeng got the news in the next moment, at the beginning, his blood surged, his head was dizzy, and he instantly felt like the sky was falling. What kind of situation is this, wave after wave, wave after wave, human beings have not even solved the food crisis, and this kind of thing has happened again......

"Can't fall...... Can't fall down......" This overwhelming despair only lasted for a while, Yu Yifeng bit his lip violently, and the violent bite instantly made his mouth turn red, and with this pain, he became a little calmer. As the head of the lunar base, he must not fall into despair like ordinary people.

Nine times out of ten, this is true, although he was not born as a scientist, he can still understand the basic physics formulas, because this is not esoteric, that is, the level of university physics.

From the point of view of energy, these formulas do not seem to be wrong in converting mechanical energy into internal energy due to frictional force.

But because of this, the problems faced by humanity are great! A drop of cold sweat dripped down Yu Yifeng's forehead.

"Miss Yuriko, I am going to hold an emergency meeting now, and I will ask the leaders of the various production groups, all important scientists must attend! It's very urgent, immediately, immediately! Yu Yifeng said eagerly.

"What? Is there something important? I must remind you that the transfer of so many important people will have a huge impact on the production of the base! ”

"No, I have something important to say! That's an order! ”

……

When the meeting was held, there were even some riots, and a small number of people were dissatisfied with Yi Feng's behavior, they felt that Yu Yifeng suddenly controlled the entire base by an outsider, and there was still some dissatisfaction in their hearts.

But at this time, Yu Yifeng was too lazy to talk to them, he cleared his throat and said directly, "Everyone, I have an urgent matter to say, it may not be very secondary, please be mentally prepared." ”

With a hint of suspicion, everyone sat down.

He turned on the computer screen, drew a ball, and drew a layer of atmosphere on the outside, and began to demonstrate.

"You see, this is our planet, the Moon."

"This is the almost destroyed Earth, and our moon is orbiting the Earth because of the gravitational pull of the Earth."

"At the moment when the Earth is destroyed, the gravitational attraction changes due to the distribution of mass, so the orbit of the Moon where we are located also changes...... The eccentricity of the elliptical orbit is around 0.21. ”

"With the change of orbit, although the far places are farther away from the earth, the closer places are also closer to the earth."

"We know that the earth is covered with a lot of gas and dust. In the former southern hemisphere of Australia, there is a super-large air mass spread out of a giant mushroom cloud. As it orbits the Earth, our Moon is about to cross that air mass. ”

"Everyone also knows that the density of this air mass is very low, less than 1/100,000th of the Earth's atmosphere. It's a mixture of water, sand, and air, and it doesn't do us humans much harm. ”

"Everybody doesn't take it seriously, but, because of that, we're all overlooking it!"

The people below listened and whispered, not knowing what Yu Yifeng was going to say.

"Listen to me, even such a thin atmosphere will bring a certain amount of air resistance, and when the moon is moving, it will produce a lot of friction with the atmosphere, converting part of the kinetic energy into internal energy."

"If you think about it, the moon is such a huge volume, and the air resistance is also very huge. So, our moon has been decelerating these days......"

Before the words were finished, some of the quick-thinking people had realized something and became restless, and the rest of the people began to vaguely realize that something was really wrong. The slowing down of the moon is necessarily not a good thing.

The entire venue became silent, and everyone began to listen attentively to Yu Yifeng's speech, and the careful thoughts in some people's hearts could only be hidden in their hearts for the time being.

Yu Yifeng paused, waited for everyone to digest it, and continued: "When the speed of the moon decreases, the centripetal force required for circular motion will be less than the gravitational force of the earth on the moon, so the moon will be sucked into it a little bit by the earth, and then, the whole system will maintain a new balance. ”

"This equilibrium is very complex, and with the loss of kinetic energy, the eccentricity of the moon's orbit will increase, and the lowest point of the orbit will gradually move closer to the earth, which is very dangerous."

"Because the closer you are to Earth, the more meteorites there are, and the higher the probability of being attacked. Moreover, as the density of the atmosphere increases, the loss of kinetic energy from the moon will also be faster......"

"We speculate that there are three possible outcomes, the first of which is that the Moon is hit by a giant meteorite. The probability of this possibility is extremely high, and a meteorite with a diameter of ten kilometers will cause a thirteen-magnitude earthquake and destroy our entire base. ”

"Second, let's say we weren't hit by a meteorite. However, the Moon is too close to the Earth and is likely to be torn apart by the pull of tidal gravity......"

"If we were lucky enough not to receive an asteroid impact, the moon wouldn't have been pulled apart by gravity...... Then, after the kinetic energy is reduced to a certain extent, there will also be a risk of collision between the moon and the earth. ”

"This process won't be short, but it's not long...... Yu Yifeng paused, and listed the formulas given by Professor Thomson on the screen, a dense list.

"According to conservative calculations, six months is the safest time!"

"In six months, we will be directly threatened by meteorites on the periphery! An asteroid 10 kilometers in diameter could completely wipe out humanity. ”

"It's also possible that the moon will be torn apart by gravity, so there is no need to say much about the fate of us humans."

"The best result of luck is only 12 months. Twelve months later, there is a risk of a collision between the moon and the earth! ”

……