Aliens wanted to colonize the earth. They first occupied Jupiter 4 in the solar system. Using the relatively good environmental conditions of Jupiter 4 as a base, they randomly irradiated the earth with gamma-ray laser weapons from a long distance and killed humans. In order to speed up the destruction of mankind, they sent alien robots to the earth in an attempt to sow discord and let humans kill each other with nuclear weapons in order to achieve the goal of human self-destruction. However, after humans discovered the intentions of the aliens on Jupiter 4, they launched nuclear missiles and laser weapons to counterattack. It took about half a year for nuclear bombs and laser weapons to fly in space to reach Jupiter 4 to destroy the alien base on Jupiter 4. The story describes a series of stories that happened when scientists from the National Laser Research Center and the National Astronomical Observatory responded to attacks by alien gamma-ray laser weapons. It allows readers to learn some modern scientific knowledge in literary stories, which is inspiring and helps improve readers' scientific literacy.
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