Checking the data in his hand, Ye Qing, a young Chinese physicist with dark skin but a very handsome appearance, couldn't help but sigh. Pen? Interesting? Pavilion wWw. ｂiquge。 info He put down the detection data in his hand and said, "Sure enough, it really can't be detected." ”

His mentor, Academician Ding, who leads a number of large-scale space projects and secret national defense projects in the country, is not as depressed as him, but has a calm attitude, Academician Ding said: "This is also natural, the other party is too different from our technical level, and we use what we understand to measure them, maybe just like a group of Neanderthals use their own skills to drill wood to make fire, to measure the nuclear reactor of modern people." ”

Ye Qing thought for a while and said, "Our intelligence officers got information from the United States that the U.S. military never got the slightest electromagnetic signal from the alien fighter in the San Francisco incident, so those warships in the earth's orbit should also use the same technology." ”

Academician Ding said: "This is not unexpected, if we can detect it by a variety of means, it is a doubtful thing." ”

China just built the world's largest single-aperture radio telescope, FAST, this year, which is one of the world's most powerful astronomical detection tools. Not only can it detect pulsars and other celestial objects thousands of light-years away, but it can also be used as a super-giant passive strategic radar due to its high sensitivity. But such a powerful astronomical detection tool still hasn't detected a single bit of information about that mysterious alien fleet. This makes people feel very powerless.

The difference between the two is as much as forty years, but they are both the country's top geniuses. In response to this unprecedented crisis of extraterrestrial contact between civilizations, China has set up an "Extraterrestrial Engagement Countermeasures Office", which has convened elites in various fields to be directly responsible to the National Security Committee to analyze and explain all kinds of information it has obtained, and at the same time to study ways to defend the country and its people in the crisis. Ye Qing and Academician Ding were both elected to this countermeasure office.

Liu Tong, a state official who had parachuted into the office to serve him, hurriedly walked in from outside and said to the two: "At this time, the Americans are still crowding out us, refusing to reach any mechanism of consultation and cooperation with us, and are determined to solve the problem by themselves. ”

Ye Qing listened to Liu Tong's words, sneered, and said, "Solve it yourself?" They have not cleaned up the mess in San Francisco, but our country has generally remained stable, and there has not been much disruption to production and life, and I heard that there have been riots of different scales in more than 20 cities in the United States, and the National Guard has already been dispatched. I can't cook well, and I still want to cook aliens, and I'm a fool of dreams. ”

Academician Ding frowned tightly and said, "Americans are used to being arbitrary, but at this juncture, they can't help but mess up their temperament. The Americans have refused to cooperate with us, I am afraid, because they already have their own plans, and this plan will definitely be a bad idea. ”

Facts have proved that Academician Ding's speculation is extremely correct.

More than four hours later, China's missile defense system detected a massive missile target in the United States and was launched at about the same time.

Ye Qing looked at the drawing images uploaded on the display screen in the office, couldn't help but feel numb, and said loudly: "Americans are crazy!" ”

Liu Tong was also shocked by the hands of the Americans, he checked the information he had, and said: "The 90th, 91st, and 341st strategic missile wings of the United States, which maintain a high state of combat readiness, have used a total of more than 70 strategic ballistic missiles, and they have no reason to fight a nuclear war at this time, that is, they want to bombard the alien fleet with nuclear weapons!" Dr. Ye, do you think the Americans could succeed? ”

Ye Qing shook his head again and again: "The lethal effect of nuclear weapons in outer space is far less than that on the ground, without air, the shock wave that can cause the most damage in nuclear weapons no longer exists, and the maximum damage caused by nuclear explosions in space comes from various radiation, high heat and neutron jets, etc., and the killing range will also be smaller than that of nuclear explosions in the atmosphere."

However, this is not the biggest problem in this attack, the missile used by the Americans should be the Minuteman III, and the alien fleet is on an orbit 200,000 kilometers above the surface, and ordinary ballistic missiles cannot launch at this height. Since the Americans rushed to attack the missiles, it shows that these weapons have been urgently improved, and they are even secret weapons that the United States has been concealing. It is not enough to be able to fight so far, this is the first time that mankind has purposefully carried out actual combat against space targets, and there is a huge disconnect between tactics and reality, and we do not know whether the United States has done relevant pre-research and deduction.

One of the most important issues I can think of is the probabilistic cloud theory of space warfare. This is a fairly central part of people's speculation about space warfare. The speed of light is constant in a vacuum, and the observation of the enemy's long-range space weapons with autonomous maneuvering is affected by the delay effect. The distance of one light second is about 300,000 kilometers, and now the alien fleet is about two-thirds of a light second away from the Earth, so even if we make real-time optical observations, we will only see the image of the other side in two-thirds of a second ago. If the opponent continues to maneuver, it is absolutely impossible for the weapon that hits the opponent's target to hit the target. Even with directed energy weapons. Therefore, in space warfare, only a rough estimate of the probability cloud space can be made based on the relative position of the opponent and its movement performance. This is a problem of quantum mechanics, the target location of our attack may be any three-dimensional coordinate point in the probability cloud, the better the opponent's mobility, the greater the muzzle velocity and acceleration, and the more flexible the steering, the larger the probability cloud will be, and the lower the probability of our hit.

Now, though, the big problem for the Americans is that their weapons are not directed energy weapons and do not reach the speed of light. Judging from the missiles they launched, it is actually a modified version of a large rocket, which exceeds the first cosmic velocity and is less than the second cosmic velocity, that is, above Mach 23 and below Mach 33. And this speed can only reach the level of five or six decimal places of the speed of light. Because the Americans do not have the technology to guide the radar of the alien fleet, it can basically only be inertial guidance, and the deviation of the inertial navigation is not discussed, but the other side only makes a slight displacement when it discovers that the Americans have launched missiles, and the Americans' nuclear bombs cannot hit. Even if the Americans use the fixed-depth detonation and multiple kill surface effects to form a killing range area, I don't think this killing range area can completely cover the space combat probability cloud of the alien fleet. ”

Liu Tong didn't understand what Ye Qing was talking about, so he naturally didn't know what it was, with his understanding, although he didn't know what this probability cloud was, but he thought simply, alien technology is so powerful, even if the vacuum-weakened version of the nuclear explosion is blown up into the alien fleet, it may not have any substantial damage.

Liu Tong asked curiously: "Don't Americans understand what Dr. Ye said?" ”

Academician Ding answered this question for Ye Qing, "It is impossible for them not to understand, the United States' attainments in space warfare, basic physics, game theory, etc., are not comparable to China's decades of catching up, they have a deep foundation, and they are still our teachers." However, the person who makes the decision is not a physicist, and in such a situation, there is always some luck. What if it hits, they will think? ”

Liu Tong was surprised: "Do you pin your chances on such unreliable gambling?" ”

Academician Ding said: "There is no way to do it, the appearance of aliens has completely broken the balance of power on our earth, and it has also seriously threatened the existence and international status of the United States. Although this is ultimately a common problem for the world's 7.5 billion people, the Americans' messianic complex is so heavy that they cannot get out of this trap. Aliens do not communicate with Earth, and with the appearance of a menacing military invasion, it is impossible for the Americans not to react, even if it is ineffective. ”

Liu Tong's voice was a little out of tune, and he said in disbelief: "It's so irresponsible for the Americans to do this!" If aliens really take their wrath at Earth, then people all over the world will suffer with it! ”

Academician Ding was not surprised by this, but said flatly: "Yes, it is actually the same as the nuclear binding back then, even if the United States is going to be finished, then the whole world will also be finished." ”

Ye Qing snorted and said, "In today's terms, all of us people in the world have been 'represented' by the United States. ”