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

For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical ...

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

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

We are less than two weeks away from the 95th anniversary of the discovery of Pluto, the ice-caked, rocky sphere orbiting around 3.7 billion miles from the sun. To mark the occasion, The Lowell ...

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 ...

This couldn’t help but remind me of how Pluto was discovered using a machine called a blink comparator. This machine dates back to 1904 and — like many things — has been superseded by modern ...

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 ...

"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 ...