NASA’sNew Horizons spacecraft has delivered extraordinary video footage showing towering ice mountains on Pluto’s moon Nix.

Finally, a family portrait of Pluto is beginning to emerge! For the first time ever, astronomers have captured two never-before-photographed moons orbiting Pluto. NASA's New Horizons spacecraft ...

Pluto may have been demoted to non-planet status, but it still commands a court of five moons, as is fitting for the king of darkness; after all, Pluto is the Roman equivalent of the Greek God Hades.

In June 2005, two small moons were discovered orbiting Pluto, much farther out than its larger moon, Charon.For a year, the discovery team, led by planetary astronomer Alan Stern of the Southwest ...

If you lived on one of Pluto’s moons Nix or Hydra, you’d have a hard time setting your alarm clock. That’s because you could not know for sure when, or even in which direction, the sun would rise. A ...

While Pluto’s largest moon Charon has grabbed most of the lunar spotlight, two of Pluto’s smaller and lesser-known satellites are starting to come into focus via new images from the New Horizons ...