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

On the 95th anniversary of its discovery, Pluto remains one of the most beloved and enigmatic worlds in our solar system, ...

On February 18, 1930, the American astronomer Clyde Tombaugh discovered Pluto! Before he discovered Pluto, another astronomer named Percival Lowell had spent over a decade trying to find it. He had ...

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 ...

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

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

On Feb. 18, 2001, auto racing star Dale Earnhardt Sr. died in a crash in the final lap of the Daytona 500; he was 49. In 1885, Mark Twain's "Adventures of Huckleberry Finn" was published in the U.S.

February 18th has been a significant date throughout history, marking a variety of events that have shaped the world. In a ...

On Feb. 18, 2001, auto racing star Dale Earnhardt Sr. died in a crash in the final lap of the Daytona 500; he was 49. In 1885 ...

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