The meteorite passed by Saturn at an ultra-high speed, and the long trail left a bright scratch on Saturn's rings, and the monitoring stations on Earth received the information as soon as possible.

"The meteorite has just passed by Saturn and left a clear mark on Saturn's rings, the meteorite velocity has been determined, and the landing point is being analyzed."

The NASA monitoring station in the middle of the night was bustling with people, and a bespectacled researcher shouted at Rachel with a tablet in his hand.

"The results of the supercomputer analysis are in! According to the data of the Earth's rotation orbit, the probability of the meteorite falling on the American plate is 17.8761%, the probability of falling on the Eurasian continent is 33.1786%, and the probability of falling on the African plate is 3.1657%. ”

Rachel nodded her head to acknowledge that she had heard it, then pushed the door open and left the noisy monitoring station, walked to the corridor and dialed General House's phone.

"General, the speed of the meteorite has been confirmed, and the probability of falling on the American plate is about 18%, and the meteorite will pass through Mars in two hours, and we will be able to accurately calculate the landing point at that time."

"Two hours later? I understand, there is another thing I want to leave to you, launching a high-yield nuclear bomb into low earth orbit, our satellites are likely to be seriously affected, and the dust from the explosion will produce a large number of radiation clouds, we need to launch radiation resistant particles to neutralize the radiation clouds, and please also simulate the diffusion of radiation clouds after the explosion. ”

"I understand, I will inform you as soon as the landing point is confirmed."

——

While the Earth monitoring station is analyzing the meteorite, the intelligent core in the aircraft's control room is also evaluating the Earth.

"Drop"

Approaching the target planet, the analytic begins to decode:

The target planet is the third planet in the galaxy from the inside and outside, about 0.819 standard units from the star, and the number of biological populations has reached level 3.

The target planet is dominated by carbon-based organisms, and has developed a social form of ethnic gathering, and intelligent life has achieved planetary dominance, and has formed a civilization form, and the target civilization space probe has been detected.

1. Detector development level: 0.0003 class.

2. Social form level: 0.0002 level.

3. Science and technology development level: 0.00007 level.

4. Resource attribute assessment: inferior.

5. Communication evaluation level: 0.00005 grade.

6. Degree of life wisdom: elementary.

7. Resource utilization efficiency: negligible.

8. Stellar Exploitation: Undeveloped.

9. Intrasystem development: Undeveloped.

10. Abundance of Intrasystem Planetary Resources: Primary

11. Orbital resource utilization: negligible.

...

87889. Outpost Situation: No Outpost.

87890. Galaxy Defense: No Defense.

87890. Probe... Particle...

"Drop"

Energy is insufficient, intelligent systems are turned off...

"Drop"

Intelligent system restart...

Interrupt the analysis program, retain the energy source of the intelligent core for the forced landing, the vehicle will reach the target planet after 0.3 microcycles, and the crash landing orbit is being calculated...

The calculation is complete...

The intelligent system is shut down and restarted after 0.3 microcycles.

——

Earth, eight hours before the meteorite arrived.

The vehicle has just passed by Mars, gaining acceleration again in Mars' gravitational orbit and heading straight for Earth.

"Determined !!"

"Determined !!"

In the Tianyan Observatory in country Z, a thin middle-aged man excitedly picked up the electronic board in his hand and shouted loudly to his colleagues beside him.

"Lao Liu, hurry, go to the conference room, the leaders are waiting online."

The emaciated middle-aged man rushed out of the monitoring station in a hurry and hurried to the conference room of the conference room monitoring center.

The conference room of the monitoring center was already full, and the huge conference screen was also online with a number of heavyweight leaders online.

"Zhang Gong, map! Make a copy of the map of the monitoring station. ”

Lao Liu, who had just rushed into the conference room, did not forget to shout loudly at the door.

Countless heavyweights gathered here, just to wait for the technicians to determine the meteorite landing point, Z country is currently capable of detecting meteorites only the Tianyan system, only to determine the meteorite landing point, there is a way to determine the range of the interception fire network, which will be related to the lives of countless people.

Lao Liu looked solemn and projected the electronic board brought by Zhang Gong onto the conference table, and marked a red circle on the map with a laser pointer.

"This narrow ellipse is the range of the meteorite's landing point..."

Lao Liu paused and continued: "You see, this narrow elliptical landing point has a wide range, from the Yangtze River Port in country Z in the west, including the southern part of country R, to Los Angeles in country M in the east, almost across the entire Pacific Ocean. ”

"How can the range of meteorite landing points be so long?" One of the leaders who attended the meeting couldn't help but ask.

Zhang Gong on the side gestured with his hand and explained: "Cai Ju, the meteorite fell into the earth from space at an oblique angle, and the landing point of the meteorite is just near the earth's morning and dusk line, and the trajectory of the meteorite is likely to be a huge obtuse angle under the influence of the earth's gravity. ”

"Since the meteorite entering the Earth will produce huge friction, any subtle variable will cause the meteorite's orbit to unpredictably deflection, so we can only do our best to calculate the range of the landing point." Lao Liu on the side added.

The old man with the Chinese face on the screen coughed lightly, and the entire venue immediately fell silent.

"Is the data confirmed?" The old man asked with a solemn expression.

"We have confirmed with the monitoring station of country E for the first time, and their data are basically the same as ours, and country M is docking data, but the preliminary observation results are consistent." Lao Liu replied with a solemn expression.

The old man was silent for a moment, but only for a moment.

"Immediately issue a level 1 alert to enforce a mandatory evacuation of all residents within the landing area, all residents must enter the air defense fortifications before the meteorite attack, and at the same time issue a warning to neighboring countries within the landing area."

"The whole military region has entered a state of first-level alert, is on standby 24 hours a day, and immediately builds a firepower network for strategic weapons in the range of the landing point, focusing on the construction of 7,000 meters of sea area within the territory and beyond the coastline, and it is necessary to ensure that meteorites do not fall within the scope of China's territory."

The old man paused, and then said: "Immediately start preparing a radiation elimination plan within the range of low-earth orbit firepower, nuclear radiation must be controlled within the standard range, and the safety of the people must be guaranteed. ”

Several senior officers present at the meeting gave a military salute in unison, and then left the meeting.

Half an hour later, all the street lamps and lighting facilities in the area were lit up, the air defense sirens sounded a deafening whistle, and a large number of armed police units in the city took to the streets, counted the number of people from house to house, and sent the residents to the nearest air defense fortifications.

A large number of residents were evacuated from high-rise buildings, and because of the lack of facilities and equipment to guide the flow of people, the officers and men of the armed police chose to use their bodies to guide the flow of people, standing in a row on the street, forming a pedestrian corridor to the air-raid shelter.

Numerous vehicles were clogged up on the main thoroughfares, and the residents of the main roads were guided by armed police officers and soldiers to the nearest air defense facility, leaving their vehicles parked in the middle of the road.

In just five hours, all the residents in the area of the landing point of country Z were evacuated to air defense facilities.

The silence of the entire Yangtze River Port was terrifying, and the originally noisy city suddenly quieted down, and many wild animals jumped out from sewers, parks and other places, curiously looking at everything around them.

At this time, ordinary residents in the air defense fortifications did not know what was going on, and in order to prevent the masses from panicking and turning into an evacuation stampede, the official version was an emergency air defense military exercise.

"How can it be a drill, it must be the old man of country M who is a dog day, let me tell you, my uncle's nephew is on the aircraft carrier, and he called me half an hour ago to ask me to pack my things quickly." A man who looked at his forty said angrily.

An aunt was still carrying a pocket for grocery shopping, and said anxiously: "Oops, I was stopped when I went out to buy vegetables, my obedient is still at home, what can I do, I can't get out." ”

"What's the matter? Your child didn't withdraw? The man on the side suddenly asked with concern.

A little boy next to the aunt pouted: "How could it be that he didn't withdraw, the police uncle knocked on the door door from door to door, and no one should slam the door directly in three minutes, and no one left in our building, she was talking about the cat she raised." ”

The people around him immediately talked about it.

"I really can't see it, cats are important or people are important."

"Ah, the police are slamming the door directly, it seems that something really big is wrong."

"Shall we go inside, this bomb shelter is unreliable, don't smash it through when the time comes."

...

At the same time, Los Angeles in country M is also carrying out large-scale personnel evacuation, a large number of drones are strapped to amplification equipment to start a full range of crowd distancing, densely populated cities are dispatched a large number of national guards, and sparsely populated remote areas are evacuated by satellite positioning and helicopters.

In the face of the government's evacuation instructions, although the people did not know the real reason for the evacuation, the vast majority of the people still chose to cooperate with the evacuation, and only a few people did not evacuate because the notice was not timely or because they did not care.

But the most troublesome is country R.

Country R itself is located in the western part of the Pacific Ocean, and the border is surrounded by the Pacific Ocean, not only the entire southern part of the country is within the landing range, but the long coastline makes the researchers of country R despair.

Although countries such as Z and M transmitted the information of the meteorite as soon as possible, according to the impact scenario simulated by the supercomputer of country R, even if the meteorite did not fall into the territory of country R, the strong earthquake generated by the meteorite impact will have a violent impact on country R, and at the same time, the strong tsunami formed by the meteorite impact will hit the entire coastal area of country R, causing incalculable huge losses.

"Prime Minister, it's only four hours until the meteorite impact, we can't evacuate all the people in such a short period of time, you know, the density of people in our country is too high." In a conference hall in Tokyo, a senior official bows down to report to the prime minister.

"Smack!"

A crisp slap resounded through the silent venue.

"Akutagawa, do you want me to watch our people being crushed by meteorites?" The prime minister on the side roared angrily.

"Prime Minister, country M has promised that they will launch nuclear bombs to defeat meteorites, and at the same time, countries Z, E, Y, and F have all promised to launch nuclear bombs to form an interception fire network within the landing area." Once again, Akutagawa buried his head deeply.

"Smack!"

It was another crisp slap, and all the other high-ranking officials sitting under the venue were so angry that they didn't dare to breathe, and many bloated officials had fine beads of sweat on their foreheads at this time.

"Have you forgotten the catastrophe of decades ago? Radiation!!! Radiation!!! Radiation!!! How many times am I going to talk to you! Idiot!! ”

"Your fathers, grandfathers, how many people have experienced that catastrophe, have you forgotten? A massive cloud of radiation is spreading over our heads, do you still want your son to have a future? Answer me, Akutagawa!! ”

Akutagawa Shio's deeply buried head dripped helpless tears, he slowly knelt in front of the prime minister, and replied with a whimper: "I'm sorry Prime Minister, but we really can't do anything anymore." ”

The prime minister sat weakly on the ornate chair in the conference room, reached out and loosened the tie around his neck, and then waved his hand to signal the others to leave. The participants immediately got up and left the venue quietly, as if they had been granted amnesty.

Akutagawa Shio slowly stood up and turned away with a gloomy expression.

"Akutagawa," the prime minister shouted as he sat in his chair.

"Prepare anti-radiation preparation and radiation neutralization equipment, for the Yamato nation ..."

——

There is only one hour left before the meteorite hits the Earth.

In the control room of the aircraft, the intelligent core is restarted again.

"Drop"

If the ship's core energy is not enough to support another reboot, the system will be permanently shut down after this shutdown until the intelligent core is recharged.

In order to ensure that the intelligent core completes the forced landing, the intelligent core forced landing plan is being planned:

Remaining energy distribution...

The remaining energy is distributed:

Crash landing catapult energy 99.996%

Host Data Analysis: Energy Allocation0.004%

The target planetary fission weapon has been detected, and the fission weapon orbit is being analyzed.

Analysis completed: According to the existing orbit, the target planetary fission weapon cannot hit the meteorite, cannot form an interception surface in the planet's orbit, and the fission weapon threat is ignored.

The vehicle is about to pass through the midpoint of gravity between the target planet and the satellite, the flight orbit is deflected according to the established orbit, and it is about to reach the morning and dusk line of the target planet, and the gravitational traction reaches the maximum, and the intelligent core is ejected after 0.00001 cycles.

——

"It's changed, the track has changed!!"

A piercing scream rang out from the NASA lab.

"It's impossible to !!"

A fat man immediately came over, and after seeing the data on the screen, cold sweat immediately wet the clothes on his back.

"How could it change?"

"It's not going to change, huh? We've calculated all the gravitational points! What are we missing??? ”

"We didn't miss it, all the parameters are based on the real-time feedback data from the satellite, Pluto's gravity, Neptune's gravity, Uranus's gravity, Jupiter's gravity, Saturn's gravity, Mars's gravity, Earth's gravity, the moon's gravity, all the parameters are not wrong."

"What went wrong?"

"What to do? It's too late to recalculate the landing point, the meteorite is about to fall, and the orbit has changed, which means that our interception nets are all useless! ”

Monitoring stations in various countries wailed.

"What went wrong?" Rachel slumped limply in her chair, staring at the station's ceiling in disdain, the error in the track meant that all their efforts would be in vain.

Suddenly, Rachel looked at the model of the Milky Way on the table, feeling as if she had grabbed something, but she still couldn't remember it.

"A meteorite of this speed hitting the earth is a disaster!" The fat man's voice rang in Rachel's ears.

"Speed? Yes, the speed!! ”

"Emily, give me the supercomputer computing center, !! soon"

Rachel seemed to be crazy, picked up the electronic board next to her and began to do a quick calculation.

"Rachel! Rachel! What exactly did you find??? ”

"What the hell are we missing?"

Rachel ignored it, and buried herself in the electronic board.

A few minutes later, Rachel sent the data on the electronic board to the supercomputer computing center.

"Next, it's up to the supercomputer calculations... It's got to be in time! Rachel kissed the bracelet of the cross on her wrist and whispered a prayer.

"Rachel! Rachel! What exactly are we missing? ”

Rachel picked up the electronic board and said to the colleagues around her: "The gravitational midpoint, the meteorite entered the solar system from outside the solar system, it has been pulled by the gravitational pull of the center of the Milky Way, it has just changed its orbit, that means that the gravitational force must have changed, we only consider the gravitational pull of the Earth and the Moon, but ignore the gravitational pull of the Milky Way." ”

"The gravitational pull of the Milky Way?"

"The center of the Milky Way is tens of thousands of light-years away from here, and the gravitational influence is almost negligible."

"No, if you consider the momentum of the upper solar system and the momentum of the Earth and Moon, plus the momentum of meteorites, then there must be a gravitational cut-off point, right...?"

"Yes!" Rachel nodded affirmatively.

"Just now, the meteorite passed the gravitational midpoint and decelerated to the maximum extent, and its speed is now only one-third of its original speed."

"Is it really just a coincidence that such a precise passing point..."

A few minutes later, the supercomputer computing center sent back the calculated data, and everyone breathed a sigh of relief when they saw the data.

As the meteorite's speed decreases sharply, it will no longer have enough kinetic energy to enter the Earth's atmosphere, but will glide some distance close to low-Earth orbit before entering deep space.

"Thirty minutes later, the meteorite will appear in the sky, rejoice!!"

The people at the monitoring station began to cheer, glad that it was just a false alarm, and as the information was transmitted, the tense nerves of all those in the know relaxed.

Rachel leaned lazily on the table, looking at the model of the Milky Way on the table, still thinking about the question.

Is it really just a coincidence that such a precise transit point?