and potentially led to the formation of Pluto's smaller moons — Nix, Styx, Kerberos, and Hydra. Bill McKinnon, a planetary scientist at Washington University in St. Louis, praised the theory ...

Pluto was always in a tough spot when it came to being a planet. Just 1,477 miles across, it's only one-fifth the diameter of Earth. It did have five known moons: Charon, Nix, Hydra, Kerberos and ...

whose diameter is just over half that of Pluto; Styx; Nix; Kerberos; and Hydra. The majority of Pluto’s atmosphere is reportedly composed of nitrogen gas. Pluto is 40 times further from the sun ...

An curved arrow pointing right. See what's so weird about Pluto and its moons. Produced by Emmanuel Ocbazghi. Original reporting by Jessica Orwig. Follow BI Video: On Facebook More from Science ...

Pluto, discovered in 1930, was once considered the ninth planet in our solar system. In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet because it doesn't meet all ...

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 ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto turns out to have as much complexity as Mars or Earth, so much so that I ...

The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe. Clyde Tombaugh didn't set out to discover Pluto when he sent his ...