Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe.

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

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

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

Pluto may not be a planet any more, but you still have a chance to see the distant dwarf planet at one of Michigan's ...

Whether Pluto is officially a planet is the least interesting thing about the runt of the solar system, astronomers will tell you 95 years after the discovery of the fascinating and sometimes ...

An amateur astronomer discovered Pluto 95 years ago today. The former planet will complete an orbit in another 153 years.

On February 18, 2007, the Samjhauta Express train carrying hundreds of Indians and Pakistanis across the border was bombed by ...

On today’s date 95 years ago, everyone’s favorite not-quite-a-planet, Pluto, was discovered by astronomer Clyde W. Tombaugh ...

The school unveiled the "alternate identity" over the summer, paying homage to the northern Arizona area's rich astronomical ...

Pluto should teach us that how an object ... Tombaugh sent some of his drawings of Mars and Jupiter to the Lowell Observatory in Flagstaff, Arizona. The observatory directors were so impressed ...