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"Pluto was found really close to where Lowell thought a planet should be, but it's also a great example of serendipity in science," Schindler said. "When Lowell was doing his work, there was an ...

Once the quirky underdog of our solar system, Pluto held planetary status until 2006, when it got a cosmic demotion that still stings space fans. Discovered in 1930, Pluto was the ninth planet for ...

We are less than two weeks away from the 95th anniversary of the discovery of Pluto, the ice-caked, rocky sphere orbiting ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague? If ...

Anyone still smarting over Pluto's demotion to dwarf planet has a reason to perk up. There's some evidence that the planetoid didn't form through the standard process and may instead be the remains of ...

It's going on two years since the International Astronomical Union rewrote its definition of a planet and busted Pluto down to something it called a "dwarf planet." But it's not a done deal, says Mark ...

Frankly, we don’t keep up much with Pluto and its status as a planet or non-planet. It’s kind of like when, as a young altar boy, the Catholic Church demoted a bunch of saints. We just rolled with the ...

This close up look at Pluto and Charon, taken as part of the mission's latest optical navigation ("OpNav") campaign from Jan. 25-31, 2015, comes from the Long Range Reconnaissance Imager (LORRI) on ...

The heart's brightness arises from sunlight reflection, while red patches, formed by tholins, showcase Pluto's atmospheric ...