National parks: DENA_AuroraRibbons_NPS - public domain image
Auroral "ribbons" light up the night sky above Denali National Park and Preserve, Alaska
Yellowstone National Park, Silhouetted Stargazer_NealHerbert_NPS
A man sits in silhouette on a rock contemplating the starry night at Mammoth Hot Springs, Yellowstone National Park.
National parks: AztecRuins_Night_BMFoott - public domain image
Stars dance in the night sky above an Ancestral Puebloan ruin at Aztec Ruins National Monument, New Mexico.
National parks: AztecRuins_Ranger_BMFoott - public domain image
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.
National parks: CedarBreaks_IDAparty_BMFoott - public domain image
A park visitor peers into a telescope for a closer view of the stars during an Dark Sky Designation party at Cedar Breaks National Monument, Utah.
National parks: BLCA_Pano_BMFoott - public domain image
The Milky Way bends above the silhouetted horizon in this panoramic view at Black Canyon of the Gunnison National Park, Colorado.
National parks: ARCH_delicate_DanDuriscoe_NPS - public domain image
A starry night sky frames this view of Delicate Arch at Arches National Park
National parks: MittenPark_DINO_Duriscoe_NPS - public domain image
The Milky Way arcs over the dramatic rock formations of Mitten Park Fault along the Green River at Dinosaur National Monument.
Mount Whitney Hut_SEKI_Duriscoe - National Parks Gallery
A starry night sky frames this view of the Mount Whitney Smithsonian Institution Shelter at Mount Whitney, Sequoia and Kings Canyon National Park, California