Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

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 ...

Pluto-Charon Formation Scenario Mimics Earth-Moon ... Both systems include a moon that is a large fraction of the size ... Dec. 19, 2024 — New studies offer a clearer picture of how the outer ...

Pluto-Charon Formation Scenario Mimics Earth-Moon ... Both systems include a moon that is a large fraction of the size ... Dec. 19, 2024 — New studies offer a clearer picture of how the outer ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...