Starry night skies are components of the special places the National Park Service protects. Our national parks hold some of the last remaining harbors of darkness and provide opportunities for the public to experience this critical resource. Animals rely on natural cycles of light and dark for navigation, protection, mating and predation. Natural lightscapes are integral to many cultures. Light pollution disrupts these relationships. NPS helps preserve night viewsheds for future generations.
O Radiant Dark! O Starry Night!
Bright areas on this global map show where sky glow from artificial lighting in North America blots out the stars and constellations.
How Bright is the Night?
Data tells park managers and citizens about the existing night sky quality, departure from natural conditions, and degradation sources.