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

Denton explained, “Pluto and Charon are smaller, colder, and primarily made of rock and ice. When we accounted for their material strength, we discovered something completely unexpected.” ...

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 ...

Scientists have discovered a new type of planetary collision called “kiss-and-capture,” where Pluto and proto-Charon briefly ...

The city of Flagstaff has taken big steps to preserve the clarity of its night sky. Find out the best ways to experience the ...

In 1928, the amateur astronomer was offered a job at Lowell Observatory in Arizona, where he discovered Pluto. In 1934, he married Patricia Edson. They had two children, Annette and Alden.

What’s unique about the separation is that Pluto and Charon still share the same orbit. This new discovery is helping researchers better understand how planets form and evolve, especially icy worlds.

"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 ...

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 ...