When was Pluto discovered? Pluto was discovered in 1930 by Clyde Tombaugh, an American astronomer at the Lowell Observatory in Flagstaff, Arizona. Cold, dark and distant, it was n ...

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

Clyde Tombaugh didn't set out to discover Pluto when he sent his sketches of the night sky to Lowell Observatory in Flagstaff ...

A nearly new moon and mostly clear skies will present near ideal viewing conditions for the planet parade through Feb. 28.

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 ...

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

Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.

An amateur astronomer discovered Pluto 95 years ago today. The former planet will complete an orbit in another 153 years.

That, plus Pluto’s small size—smaller than our moon—suggested that the ... solar system with an uncounted number of planets. Stern thinks the dwarf planet distinction is nonsensical ...