A NASA mission arriving in the Pluto system next year could help scientists figure out if the dwarf planet's largest moon Charon might have once harbored a subsurface ocean of liquid water ...

The love story between Pluto and Charon may have started with a kiss. A new study suggests the dwarf planet and its scarcely smaller moon likely came together in a collision that saw them ...

Two of Pluto's midsize moons may be made of the guts of its largest moon, Charon, new research suggests.

(CNN) — For decades, astronomers have tried to determine how Pluto acquired its unusually large moon Charon, which is about half the size of the dwarf planet. Now, new research suggests that ...

A new study suggests that the origin of Pluto's largest moon was quite different than our own. Here's what you need to know.

Astronomers Demote Pluto Clyde Tombaugh's 1930 discovery is reclassified as a dwarf planet after much scientific debate. -- Pluto's moon Charon may be the "Hulk" of the solar system.

Pluto's largest moon, Charon. (Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute) Labroots recently explored Saturn’s sponge-like moon, Hyperion, with its ...

Pluto has long been one of the most debated celestial bodies in our solar system. Once classified as the ninth planet, it was ...

A tiny new moon has been discovered around Pluto, the fourth and smallest one yet found orbiting the dwarf planet, photos from the Hubble Space Telescope reveal. The moon, which has been ...

The newfound Pluto moon was spotted by researchers using NASA's Hubble Space Telescope. The instrument has also found three other Pluto satellites — P4 last year, and Nix and Hydra in 2005.

This story was updated at 11:05 a.m. EDT. A tiny new moon has been discovered around Pluto, the fourth and smallest one yet found orbiting the dwarf planet, photos from the Hubble Space Telescope ...

Astronomers using the Hubble Space Telescope have discovered Pluto's fifth moon, a little more than three years before a NASA space probe is due to sail past the dwarf planet and its tribe of ...