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This is a cosmic dialogue that spans thousands of years, a science fiction epic that connects ancient and modern times. When you look up at the starry sky, what you see is not only the starlight, but also the technological dreams woven by countless explorers with their wisdom and courage. An astronomer in the Tang Dynasty risked being fired when he used a homemade modified armillary sphere to observe comets and accidentally recorded a mysterious companion star; while Lin Wei, a female astronaut on the modern space station, was observing rare gamma ray bursts, she accidentally discovered that her son's amateur observations echoed records from the Tang Dynasty thousands of years ago; Xiaohang, a young boy from Mars, relied on ancient star charts to navigate on the red planet, and finally integrated ancient and modern wisdom to discover new celestial bodies. The three people communicated through space events such as comets and supernova explosions. From naked-eye star observation to space exploration, from the earth to Mars, what has changed is technology, but what remains unchanged is mankind's eternal desire to explore the universe.