And one of those moons, known as Charon, is half the size of Pluto itself. But that’s not the only thing that’s unusual about ...

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

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

Using NASA New Horizons spacecraft data and digital elevation models of Pluto and its largest moon Charon, mission scientists ...