The far side of the Moon has its own versions of the Grand Canyon—two of them, in fact! A new study explains how these deep ...

The city of Flagstaff has taken big steps to preserve the clarity of its night sky. Find out the best ways to experience the ...

The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.

Jan. 31, you can experience a blue moon, supermoon and blood moon in Arizona. Here are tips from astronomers to get the best views.

The city of Flagstaff ... town — no, Arizona isn’t all desert — is where Pluto was discovered, where astronauts trained to walk on the moon due to its lunar-like landscape and where ...