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

At the Lowell Observatory, visitors can conjure their inner astronomer by peering through world-class telescopes and sitting in on lectures on topics like black holes and the history of Pluto.

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

The Lowell Observatory, where Pluto was discovered, offers stargazing opportunities that reveal the mysteries of the universe ...

An astronomer led an international study mapping galaxy clusters, and it was published Monday in The Astrophysical Journal ...

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

The observatory is set to undertake a 10-year time lapse of the universe. Here's everything you need to know about the Vera C. Rubin Observatory and its groundbreaking mission.