Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.

The "Star Trek" legend's only son will discuss his memoir at the annual space-themed event.

Homolovi State Park was ranked among top road trip destinations in Arizona, and for good reason. Here's why you should make ...

Scientists across the world, including some in Arizona, are keeping an eye on an asteroid that has a very slim chance of ...

Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...

Toward the end of the 18th century, astronomer William Herschel used star counts to map out the Milky Way ... the credit for this discovery, but Lowell Observatory astronomer Vesto Slipher ...

A charming Arizona town in the west was designated as the world's first International Dark Sky City, meaning it offers beautiful views of the Milky Way.

The annual event celebrates the discovery of the little planet with a big heart and other scientific advances at Flagstaff, ...

Cody Half-Moon is the Chief Marketing Officer at Lowell Observatory, where she combines her extensive skills and experience with a deep understanding of Lowell’s culture and people. Known for ...