Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why ...

On July 14, 2015, New Horizons conducted a flyby past Pluto and its moons, giving scientists back on Earth their first close-up, detailed views of the former planet. Images showed the scarred ...

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

The problem was that the term "planet" had no firm definition ... to that end for this winter. Pluto will always be special. We'll see it up close when the New Horizons spacecraft, launched ...

Pluto was discovered at Lowell Observatory in Flagstaff in 1930. Planet X, as it was called, was quickly renamed Pluto, the Roman god of the underworld.

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 ...