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

Hi! My name is Alice, and I'm a Pluto truther. While some people obsess over Roswell and the moon landing, I'm convinced Pluto (the dog, not the planet) is fully capable of standing on two legs ...

Arizona Gov. Katie Hobbs signed a bill making Pluto the official state planet. It was discovered at an observatory in Arizona, but was downgraded to a dwarf planet in 2006.

Pluto soon became America’s favorite planet, especially after Walt Disney named one of his characters, a charismatic dog, after the newly found planet.

Pluto soon became America’s favorite planet, especially after Walt Disney named one of his characters, a charismatic dog, after the newly found planet.

The debate over Pluto’s status rages on, largely in the popular press. For example, within a 2-month period, The New York Times reported that Pluto is such a runt that it may be getting kicked out of ...

Just the opposite: The dog, which premiered the same year as Pluto was discovered, was likely named by Walt to ride the planet’s publicity wave.

Pluto soon became America’s favorite planet, especially after Walt Disney named one of his characters, a charismatic dog, after the newly found planet.

The whole thing is a bit silly, writes Dave Eicher. Is Pluto a planet? It's still out there, an intriguing, distant body in our solar system.

At the conclusion of his speech, Stern taught the crowd the “Pluto salute,” holding up nine fingers to signify Pluto should be the ninth planet. “Is a chihuahua a dog?

It’s been 18 years since Pluto’s celestial status was called into question—yet the matter seems far from settled. We asked experts from both sides to make their case.