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

And then, you have this third zone of icy dwarf planets, icy small bodies in the Kuiper Belt — and Pluto's the big one, the king of those. — 'What exactly is a planet?' Astronomers want to ...

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

Astrophysicists have been grappling with the question of how water arrived on our young planet for decades. One of the ...

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 ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

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

The New Horizons was the first mission to the planet Pluto and the Kuiper Belt. BRUCE WEAVER/AFP—Getty Images But Pluto has in many ways only grown in astronomers’ estimations. It is now known ...