The Dark-Sky Movement is a worldwide campaign to reduce light pollution. The movement's goal is to decrease light pollution in order to preserve the natural night sky. 

Since our initial discovery of light pollution, amateur and professional astronomers alike have worked towards protecting the night sky. Faced with the unstoppable expansion of urbanization, astronomers began making efforts to reduce the effects of city lighting and skyglow. Today, the movement is stronger than ever and continues to fight for more responsible lighting practices.