After hundreds of millions of years, creatures on the earth have adapted to the alternation of day and night. But even so, the lights and high-rise buildings that represent modern civilization are still gradually confining the world to an increasingly narrow starry sky. People live in the city and enjoy the material enjoyment at the expense of pollution. What does light pollution cost us? I hope to amplify the empathy point between humans and nature to arouse people's attention to light pollution, reflection on unconscious destruction, and awe of darkness / nature.