"The mass of the space meteor hammer is more than 30 times that of the Yinyi space cruise ship. It is impossible for it to have the speed of Yinyi at present." Du Xingyu said at the Military Council of the human Guardian Alliance: "The acceleration process of space meteor hammer is relatively slow, so it must go through a certain space distance and time, let the propeller continue to give it acceleration and increase its kinetic energy, so as to achieve the expected effect."


    "Therefore, we need to launch the space meteor hammer half a year or even a year in advance, set an acceleration orbit, and collide with the meteor when it reaches the predetermined orbit of Jupiter!"


    "Commander Du, listen to what you say, I find that our enemies seem to adopt this method," said a military expert. "Didn''t the Death Star reach its current speed after a long-distance acceleration?"


    "From this, the speed of death star was not fast at the beginning, or even very slow. Does this mean that our enemies did not form a comprehensive crush on us in science and technology?"


    "Yes, this is also my guess." Du Xingyu agreed with him very much. He said: "that''s why I say we are not powerless!"


    "In addition, the use of space meteor hammer makes me realize that we have been mentioned before." Du Xingyu continued to analyze.


    "Think about it. As a space kinetic energy weapon, someone must have started it at some point."


    "The last time the forerunner 5 explored the death star, it started. According to the output power of its thrusters, we concluded that the thrusters installed on the Death Star certainly did not exceed the scope of the nuclear fusion power plant."


    "Using the flight speed and orbit inversion, the initial launch site of the death star may be near the inner part of the solar system."


    After observation and calculation, astronomers realized that there is a cluster of nebular residual material at the periphery of the solar system, about 50000 to 100000 astronomical units away from the sun (one astronomical unit is the average distance between the earth and the sun), which is called Oort cloud. The maximum radius of Oort cloud is almost one light year.


    "Do you mean that our enemy is now within a light year of us?" one expert wondered.


    "Very likely." Du Xingyu said seriously.


    "Then why didn''t they show up directly and use kinetic energy weapons?" someone asked.


    "Maybe this is the most labor-saving way to kill humans," said an expert. "It doesn''t need any extra firepower or resource consumption. Transforming an asteroid can destroy the earth''s surface and human civilization. It''s very cost-effective!"


    "It may also be a test!" said a North American strategist. "We don''t know the enemy''s strength. Similarly, the enemy may not know our strength."


    "They aim kinetic energy weapons at us in distant places. If we can''t solve the Death Star crisis, they can easily destroy mankind. If we can solve it, they can also know some human scientific and technological level and make strategic adjustment through early launch detectors."


    "We haven''t found the enemy''s detector yet, but five of our foreseer detection satellites have been killed. It''s certain that our strength has been exposed!" they have realized this for a long time, but they can''t help it.


    Because now I am in the light and the enemy is in the dark. Even if it is just the temptation of the enemy, they must go all out!


    "Guys, maybe we can get another message," said Du Xingyu. "Since the enemy already knows that our scientific and technological strength is less likely than theirs, they will certainly take further action."


    "But four years have passed since the laser on the Death Star destroyed the detection satellite, but the enemy still didn''t show up, nor did they see their detector or fleet. It''s possible that they have put the detector, but we didn''t find it."


    "In short, their large forces did not appear. There are probably many reasons. One of them is that their fleet will be much slower than the speed of light. It will take some years to fly to the earth from the distance of Oort cloud."


    "Yes! The probability of this reason is very high!" immediately a mathematician said.


    "We still have some time before the main force of the enemy arrives." Du Xingyu said, "we need more detection satellites to detect the direction of the death star, and strive to find the enemy''s movements in advance! A tighter protective network should also be established in outer space - the most important thing is the construction of space meteor hammer and space fleet."


    In this year, in addition to manufacturing a space meteor hammer, they also completed two planetary space cruisers, named "golden wing" and "ink wing", and a space supply ship "tiancang".


    "It''s time to build a planetary Space Battleship this year." the decision was unanimously adopted at the meeting.


    Space battleships will be the main firepower output of the space fleet.


    Both kinetic energy, equipment and defense capability are stronger than cruise ships.


    To this end, in addition to designing laser weapon systems and hydrogen bomb launchers, Du Xingyu also specially designed small offensive kinetic energy weapons, "space darts" and "space spears".


    Both of them are destructive kinetic energy weapons that can accurately attack local warships. They are made of special alloy and have their own kinetic energy.


    ……


    Two years later, Mars base.


    Today''s Mars base has built a small military city. The surface part is mainly the lifting field of spacecraft, Mars automatic chemical plant, radar and other equipment, and the underground part is where the staff live and live.


    Du Xingyu, the space military command of Mars base, and Wang Yu, the commander-in-chief of the Space Defense Department of the human Guardian alliance, are arranging an important space operation.


    Although Wang Yu was nearly 60 years old, he was tall and meritorious. Relying on his excellent talent and command ability, he became the commander-in-chief of the space defense department.


    In his military life, he has experienced the test of life and death, even more than life and death, but today, the decision he wants to make still makes him nervous and dare not slacken!


    "Meteor strike troops, report the situation!" Wang Yu shouted in the communicator.


    The meteor strike force is the team in charge of the asteroid impactor. They are now on the moon.


    The signal went back and forth between the moon and Mars. Ten minutes later, their reply sounded in the horn: "report to the commander in chief, report to the commander in chief, the meteor is ready, and ten space meteor hammers are waiting to start!"


    Du Xingyu and Wang Yu looked at each other and nodded tacitly.


    It''s time to launch the asteroid impactor! Kinetic energy weapons will accelerate for a year and hit the death star in a year!


    Wang Yu ordered: "the meteor strike force obeys the order and launches the space meteor hammer on time according to the established orbit."


    "Meteor received!" on the moon, ten giant space meteor hammers lie quietly on the launch site.


    As time went by, it soon reached the calculated launch time.


    "Launch!" the computer gives instructions to ten space meteor hammers at the same time.


    The giant thruster at the tail of the space meteor hammer starts, and the ejected material brings propulsion to the meteor hammer.


    The ten giants took off on the dark moon, occupied ten different orbits and flew towards Jupiter!


    "Launch!" although Wang Yu launched, he felt even heavier.


    A year later, meteor hammer will collide with the death star, which will be their first battle with the unknown enemy!


    ……


    Ten months later, the earth space port, with a one kilometer long shuttle like space warship entering the space port, the first human space fleet, Longwei fleet, was finally established!


    Longwei fleet consists of ten space warships.


    A spaceship, the dragon eye. It is a flying saucer shaped space warship with a diameter of 820 meters. It has all kinds of maintenance and research equipment. Its combat effectiveness is weak, but its scientific research ability is very strong.


    Two space supply ships, tiancang 1 and tiancang 2. It is 500 meters long and 80 meters wide. Its detection and combat capabilities are weak, but its maximum speed can reach 1300 kilometers per second. It is mainly used for the supply of space warships.


    Two space frigates, dragon scale one and dragon scale two. It is a torpedo like space warship with a length of 700 meters and a width of 100 meters, with a maximum speed of 1000 kilometers per second. It is equipped with various defense, attack and detection equipment, which is mainly used to protect motherships and other warships, with medium combat effectiveness.


    Three space cruisers, silver wing, golden wing and ink wing. The arrow shaped space warship with a length of 788 meters and a maximum width of 345 meters has a maximum speed of 1000 kilometers per second. Strong combat effectiveness.


    The last two space battleships, the keel and the Dragon horn. With a length of 1073 meters, a maximum width of 385 meters and a maximum speed of 1500 kilometers per second, it is a shuttle loaded space warship with fat middle and pointed ends. It is also the most powerful ship in the whole fleet, equipped with the most advanced space weapons.


    Among them, the keel will serve as the command ship of Longwei fleet, that is, the flagship; The Dragon horn is an auxiliary ship. Once the keel is destroyed, the Dragon horn will assume the role of flagship, and so on.


    "Report! The keel has entered the port, request instructions!" Hou Zhengxin, the captain of the keel, the General Commander of Longwei fleet, reported to the alliance headquarters.


    In the headquarters, Du Xingyu, Wang Yu and important figures from all continents are waiting here.


    "You can start." Du Xingyu looked at the crowd and said slowly, "in another 20 days, we will start to hit and capture the death star. We need the assistance of the fleet. Commander Wang, please order!"


    Wang Yu nodded and ordered: "Longwei fleet, silver wing, dragon scale 1 and dragon horn, immediately set out to the orbit of Jupiter to assist the meteor force in completing the impact and fishing task of the death star."


    "Tiancang-1, Longmu and Jinyi are on standby at the Martian spaceport."


    "Tiancang-2, longping-2, keel and Moyi carry out escort and cruise missions on the earth."


    "Longwei fleet received and began to execute the order!" Hou Zhengxin began to dispatch the ships.


    Du Xingyu reminded the communication equipment, "Captain, let me say one more word. Now we are going to take the initiative to intercept the death star, and we are likely to face the Countermeasures of unknown enemies!"


    "So from this moment on, whether going to Jupiter or warships stationed on earth and Mars, we must maintain the highest alert! You are the strongest space defense force of mankind at present! Understand?"


    "I see!" the ten captains shouted together. Naturally, they knew the importance of this mission.


    This is the first "external" mission of Longwei fleet, and it is also an important turning point for human beings to start self-help in 12 years!


    One wrong step is doomed!