Outdoor lighting for buildings, roads and advertising can help people see in the dark of night, but many astronomers are growing increasingly concerned that these lights could be blinding us to the rest of the universe. An estimate from 2023 showed that the rate of human-produced light is increasing in the night sky by as much as 10% per year . I'm an astronomer who has chaired a standing commission on astronomical site protection for the International Astronomical Union-sponsored working

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