Dark-sky movement
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The dark-sky movement is a campaign to reduce light pollution. The advantages of reducing light pollution include an increased number of stars visible at night, reducing the effects of electric lighti
Clear night skies are the goal of the dark-sky movement; Bonito Park, near Flagstaff, Arizona.
San Francisco Peaks at sunset, just north of Flagstaff.
The city of Flagstaff, Arizona uses effectively controlled lighting to minimize light pollution while keeping the ground visible.
Mexico City at night, showing skyglow bright enough to read a book outside.
International Dark Sky Week
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International Dark Sky Week is held during the week of the new moon in April, when people worldwide may turn off their lights to observe the beauty of the night sky without light pollution. This event
Dark-sky movement
…lighting on the environment, improving the well-being, health and safety of people and wildlife, and cutting down on energy usage. Earth Hour and International Dark-Sky Week are two examples of such efforts. The movement started with professional and amateur astronomers alarmed that nocturnal skyglow from urban areas was…
Composite image of worldwide light pollution at night