Nestled atop Mars Hill in Flagstaff, Lowell Observatory has been a cornerstone of astronomical discovery since 1894 — and it’s still inspiring curiosity today.

In Flagstaff, Lowell Observatory has proclaimed the “Year of Pluto” and planned a series of celebrations, beginning with a visit Feb. 21 from mission leader Stern, who said in Tucson recently ...

FLAGSTAFF — At Lowell Observatory, where Pluto was discovered in 1930, a crowd waited anxiously Tuesday afternoon for the “beep” that would signal New Horizons had successfully completed its ...

A new study finds that galaxy clusters — cosmic cities packed with thousands of galaxies — trace invisible highways of dark ...

As climate change has led to more severe weather, wildfires, storms and more, many people are thinking about how to save what ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

Guide to the best hotels and things to do in Flagstaff. Maps, travel tips and more.

Lowell Observatory is ranked #2 out of 18 things to do in Flagstaff. See pictures and our review of Lowell Observatory.

U.S. Senators Mark Kelly (D-AZ) and John Cornyn (R-TX) introduced a bipartisan resolution recognizing June 30 as National Asteroid Day. With this resolution, the senators hope to elevate public ...

Lowell Observatory in Flagstaff — the historic research center where Pluto was discovered — has made national headlines lately, earning back-to-back accolades from two major publications.

The Cottonwood Police Department has released drone footage used to help Sedona Police Department officers and Yavapai County Sheriff’s Office deputies locate track and arrest Adam Christopher Sheafe, ...