The discovery of another moon around Pluto is exciting news for planetary science, but it's also likely causing some anxiety for the team in charge of New Horizons, a spacecraft set to be the first ...

NASA’sNew Horizons spacecraft has delivered extraordinary video footage showing towering ice mountains on Pluto’s moon Nix. These ice peaks, some rising as high as 11,000 feet, are made of pure water ...

After a 10-year-old wrote to NASA begging for Pluto to be re-instated as a planet, Administrator Jared Isaacman appears to be ...

Debate has raged for two decades over whether Pluto should be considered a planet. Some want President Trump to take action ...

For decades, scientists have theorized that Pluto's unusually large moon Charon formed through a process similar to Earth's moon—a massive collision followed by the stretching and deformation of fluid ...