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

An curved arrow pointing right. NASA's New Horizons probe flew past Pluto last July, and it took the most detailed images of the planet that have ever been seen. NASA just released some of the ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

A ninth planet, Pluto, had been discovered ... where you can see mountains and craters and valleys, all this stuff up close," ...

Forbes contributors publish independent expert analyses and insights. Jamie Carter is an award-winning reporter who covers the night sky.

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto turns out to have as much complexity as Mars or Earth, so much so that I ...

We bring up this history because it is directly related to the story of Pluto. In 1846, Neptune, the fourth of the giant planets beyond the asteroid belt, was discovered—thirty times farther ...

But by counting all the asteroids, the number got up above ... nine planets, which came about in the 1960s and lasted only until 2006, was a blip on the screen. And if you are still a Pluto ...

With Mercury charging up your fourth house of home, there is mental energy and traction surrounding your personal life. Still, the messenger planet’s sextile to Pluto in your stability-seeking ...

Unlike other planets that have a more or less circular, equatorial orbit around the sun, Pluto’s is sharply inclined and ...