P.O. Box 98199
Washington, DC 20090-8199
Inspiring people to care about the planet since 1888
Learn More »
← Back to Counting Stars at the Saguaro National Park BioBlitz
In the map above, the lighter the dots, the brighter the night sky. The darker the dots, the darker the night sky. Map courtesy of Mark Newhouse and Dave Bell, NOAO
© 1996-2012 National Geographic Society. All rights reserved.