Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

According to Dr. Grundy, Pluto is a planet. "I use the word 'planet' to refer to it, and most of the planetary science ...

When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

Now, new research suggests that Pluto and Charon briefly came together billions of years ago in a newly discovered “kiss and capture” collision. Scientists have long theorized that Charon ...

It was not until 1994 that the Hubble Space Telescope produced the first image of both Pluto and Charon with clear space between them. Christy's discovery was important because the existence of ...

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 ...

Pluto was discovered in 1930 by Clyde Tombaugh while he worked at Lowell Observatory in Flagship, Arizona. Sputnik Planitia is a white basin measuring 750 by 1,250 miles near Pluto's equator that ...

"Pluto and Charon are different – they're smaller, colder, and made primarily of rock and ice. When we accounted for the actual strength of these materials, we discovered something completely ...

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"Pluto and Charon are different—they're smaller, colder and made primarily of rock and ice,” said Denton. “When we accounted for the actual strength of these materials, we discovered ...