Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.
The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe.
The "Star Trek" legend's only son will discuss his memoir at the annual space-themed event.
The annual event celebrates the discovery of the little planet with a big heart and other scientific advances at Flagstaff, ...
The school unveiled the "alternate identity" over the summer, paying homage to the northern Arizona area's rich astronomical history.
“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...