O Radiant Dark! O Starry Night!

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.

Model of globe shows light pollution in North America.

Electric Night

Bright areas on this global map show where sky glow from artificial lighting in North America blots out the stars and constellations.

Satellite view of Berlin shows sprawling city lights

Go For Dim When Choosing Lights

The American Medical Association Urges Communities to Improve Lighting Systems with Guidance

A biologist wears protective latex gloves while handling a big brown bat.

Unsung Heroes of the Night

A video of the BioBlitz Bat Inventory at Rock Creek Park gives front row views of biologists measuring and inspecting Big Brown bats.