Everyone's favorite dwarf planet, Pluto, was discovered just 95 years ago. Here's the story of how the once-ninth planet was ...

Pluto was discovered at Lowell Observatory in Flagstaff, Arizona in 1930 and was considered our ninth planet until 2006. The International Astronomical Union reclassified Pluto as a dwarf planet ...

For that's the day my father, Clyde Tombaugh, a farmboy-turned-astronomer, discovered Pluto, becoming the first American to find a planet. (Or a dwarf planet, as it's now officially known.) ...

Ever since astronomer Clyde Tombaugh discovered Pluto in the 1930s, scientists have never shied from rigorously exploring and debating the mysteries surrounding it. For decades researchers have sought ...

Today, when tens of thousands of minor planets have been discovered (most residing in an "asteroid belt" between Mars and Pluto), not even the meanest of teachers would require students to learn ...

Recent near-infrared spectroscopic studies carried out by the James Webb Space Telescope (JWST) found that Pluto contains both methane and ethane on its surface, key volatile molecules often found in ...

That, of course, had more to do with astronomers on Earth than any celestial sleight of hand, but the truth is, Pluto has been a tough world to crack since before it was discovered. (See what ...

Here are the five most surprising things discovered by the deep-space instrument. After almost a decade in space, the New Horizons probe's close encounter with Pluto lasted just six days as it ...

Tombaugh, of course, is the Kansan who discovered Pluto in 1930. He died in 1997, but the scientific dispute about Pluto’s status – whether it deserves to be labeled a “planet” – is ...

There was Pluto, discovered practically by luck in 1930, and that was it. Astronomers photographed squares of the night sky and compared the images to see if anything was moving, but either their ...