A park ranger identifies a constellation for park visitors attending a stargazing program in Rocky Mountain National Park, Colorado.
A park visitor enjoys views to the stars through a telescope at a stargazing event along Trailridge Road at Rocky Mountain National Park, Colorado.
A park ranger stands inside an Ancestral Puebloan ring of stones and points his laser to a planet in the night sky at Aztec Ruins National Monument, New Mexico.
Park visitors enjoy an evening of stargazing in Cataract Canyon at Canyonlands National Park, Utah.
A variety of telescopes in the foreground stand on the ready for a stargazing event, with park visitors waiting for night to descend at Rocky Mountain National Park, Colorado.
Cover view of the National Park Service Junior Ranger Night Explorer activity guide for ages 5 to 12.