The Grand Canyon's night skies are exceptionally dark, making the park a fantastic place for stargazing.
It's as deep as a 60-story building and as wide as 20 football fields. Don't miss this popular meteorite impact site, located on I-40, 35 miles east of Flagstaff.
The entire park becomes an observatory during the annual Star Party when volunteers set up scopes and offer free astronomy programs to visitors.
Fifty years ago, Americans landed on the moon. Few know the important role the Grand Canyon area helped achieve this seemingly impossible goal.
Just minutes from White Sands National Park, Alamogordo has some selfie-worthy attractions.
This observatory helped create maps of the moon and is home to the telescope that helped an observatory assistant discover Pluto.
Arizona's Meteor Crater and Lowell Observatory has helped map the moon, discover a planet and unravel the mysteries of the universe.