The sense of repression in his heart grew stronger, and Thomson was even unable to respond to Thomas and calculated it on the computer.This is the keen intuition of the top scientists, he has a foreboding, a crisis is brewing, a disaster that no one has thought of is quietly happening...

The ten fingers quickly tap the keyboard and list various equations: kinetic formula, friction formula, aerodynamics, fluid mechanics, and gravity.

Soon, these formulas were sorted on the screen, and after the computer began to operate, Thomson's breathing began to become heavy, and he felt that there were some signs of fainting.

The supercomputer was very fast, only a second of effort, and the result was already out, and in an instant he felt that his heart was pounded with a big hand and a pale and terrible face.He wished he had been wrong...

“Teacher, look at the ice I’ve collected!”His student Thomas, holding a piece of plastic film, rushed into the lab, and immediately stopped talking when he saw Thomson working.

Tomson mentor was a very harsh man, and disturbing his work would be criticized.No one likes to be disturbed when they are at work.

Since the explosion of the earth, they have lost their loved ones, and the usual teacher-student relationship has been much closer, and Thomson's teacher's demands on him have become more and more stringent.

However, in any case, Thomas can always feel a hint of love in these harsh requirements.They may be the ones most familiar with each other.

"Thomas, look at me, don't you think."Thomson was afraid that he would miscalculate himself, and said in a tired tone.

This time, he repeated it on the computer, and each formula was gradually written, and it took a long time.In fact, according to the usual level, these simple deductions simply can not take so long, as if these few lines of formula took his life of strength.

“This is...”

Thomas did not notice something wrong with Thomson's face, he looked curiously for a moment, and the genius's brain quickly reacted, "Oh...I see, you are counting a ball of high speed motion, how far can you fly in the air?"There should be no problem with the calculation process.Ah, this is...”

Seeing the familiar parameters, Thomas suddenly thought of a possibility, with his eyes wide open and trembling all over his body.He rubbed his eyes, looked at it again, found that he was not mistaken, the fear in his heart could hardly be described in words, and he sat on the ground as his ass and saw Thomson's eyes.

“Did God abandon us?”

...

Yu Yifeng got the news in the next moment, at the beginning, his blood surged, his head fainted, and instantly felt that the sky had fallen.What is this situation, a wave of uneven, wave after wave, human food crisis has not yet been resolved, and this kind of thing has happened again...

“Can’t fall down...can’t fall...” This overwhelming despair lasted only a moment, and Yi Feng bit his lips sharply, and suddenly his mouth turned red, and by this pain, he became a little calmer.As the head of the lunar base, he must not fall into despair like ordinary people.

Although it is not the birth of a scientist, the basic physical formula can still be understood, because it is not esoteric, that is, the level of university physics.

These formulas, from the point of view of energy, because of the action of friction, the transformation of mechanical energy into internal energy, there seems to be no mistake.

But that’s why humans are in trouble!A drop of cold sweat dripped from the forehead of Yi Feng.

"Miss Lily, I am now holding an emergency meeting, asking the leaders of the various production groups, all important scientists must attend!"It’s urgent, right now!”He said eagerly.

"What?Is there anything 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!This is 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, and they felt that Yi Feng suddenly controlled the entire base, and there was still some dissatisfaction in the heart.

But at this time, Yu Yifeng was too lazy to tug at them, he cleared his throat and said directly, "Gentlemen, I have an urgent thing to say, may not be very seconds, please be prepared."

With a hint of suspicion, the people sat down.

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

"You see, this is the planet on which we live."

“This side is the almost destroyed Earth, and our moon is orbiting the earth because it is affected by the gravity of the earth.”

“In the moment when the Earth was destroyed, the gravity changed because of the mass distribution, so the orbit of our moon changed ... The eccentricity of the elliptical orbit was around 0.21.”

“As the orbit changes, the distance is farther away from the Earth, but the proximity is also closer to the Earth.”

“We know that there is a lot of gas and dust hanging over the earth.In the former southern hemisphere of Australia to the past, there is a huge air mass spread out by giant mushroom clouds.As we orbit the earth, our moon is about to pass through that air mass.”

“We all know that the density of this air mass is very low, less than one-hundredth of a hundred thousandth of the Earth’s atmosphere.It is a mixture of water, sand and air, and it does no harm to us as humans.”

“Everyone doesn’t take it for granted, but that’s why we’ve all been negligent about it!”

The people below listened and whispered, not knowing what Yi Feng was going to say.

“Listen to me, even such a thin atmosphere will bring a certain amount of air resistance, and when the moon moves, it will cause a lot of friction with the atmosphere, and some of the kinetic energy will be converted into internal energy.”

Think about it, the size of the moon, the air resistance is also very large.So our moon has been slowing down all these days. . . .

Before the words were finished, some quick-thinking people had realized what they had become disconcerting, and the rest of them began to realize that things were really bad.Slowing down the moon is not a good thing.

The whole venue became silent, and everyone began to listen attentively to Yi Feng's speech, and some people's small thoughts could only be temporarily hidden in the bottom of their hearts.

Yu Yifeng paused, and when everyone had digested it, he continued: "When the speed of the moon decreases, the centripetal force required for circular motion will be less than the Earth's gravity to the moon, so the moon will be sucked into the earth a little, and then the whole system will maintain a new balance."

“This balance is very complex, and with the loss of kinetic energy, the eccentricity of the Moon's orbit increases and the lowest point of the orbit gradually moves closer to Earth, which is very dangerous.”

“Because the closer it is to Earth, the more meteorites there are, the higher the probability of being attacked.”And with the increase of atmospheric density, the faster the loss of lunar kinetic energy...”

“We speculate that there were three outcomes in the end, the first, the moon was struck by a giant meteorite.The probability that this could happen is so great that a meteorite 10 kilometers in diameter would trigger a magnitude 13 earthquake that would destroy our entire base.”

“The second, let’s say we weren’t hit by a meteorite.However, the moon is too close to the earth, and it is likely to be divided because of the pull of tidal gravity.

“If we are lucky enough not to receive an asteroid impact and the moon is not torn apart by gravity ... then when the kinetic energy is reduced to a certain extent, there is also a risk of collision between the moon and the earth.”

“This process will not be short, but it will not be long...” Yu Yi Feng paused, listing on the screen the formula given by Professor Thomson, a large string of dense.

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

“In six months, we will be directly threatened by the outer meteorite!”An asteroid with a diameter of 10 kilometers can completely wipe out humanity.”

“It’s also possible that the moon is torn apart by gravity, so we don’t have to say much about what happens to us as humans.”

“The best luck is 12 months.Twelve months later, there is a risk of a collision with the moon!”

...