Pluto's secrets are being unraveled! Astronomers have found convincing evidence of a massive ocean of liquid water hidden beneath the dwarf planet's icy surface. This exciting discovery ...

University of Arizona researchers have unveiled evidence of romance at the farthest reaches of the solar system: a cosmic ...

The heat might be coming from a hidden ocean or radioactive elements beneath Pluto's surface. This would be a real turn-up for the books as, until now, astronomers thought Pluto was too old to ...

A blue atmosphere, smooth areas, and youthful mountain ranges - this dwarf planet is full of surprises. When NASA's New Horizons probe flew past Pluto in July 2015, the images it returned astonished ...

The Pluto-Charon system is located an average of 3.5 billion miles (5.7 billion kilometers) from the Sun, and at that distance Charon's surface gets down to a frigid –364° F (–220° C).

The Pluto-Charon system is located an average of 3.5 billion miles (5.7 billion kilometers) from the Sun, and at that distance Charon’s surface gets down to a frigid –364° F (–220° C).

In fact, Charon is so large compared to its host world that it and Pluto actually orbit a common center of mass (or “barycenter”) that is outside the surface of Pluto itself. This peculiar ...

Artistic representation of the huge and slow impact on Pluto that led to the heart-shaped Sputnik ... [+] Planitia structure on its surface. Ever since NASA's New Horizons sent back the first-ever ...

The impact would have meant that “basically the entire surface of Pluto gets resurfaced,” Denton said, with Charon losing most of the ice on its surface to its companion. “The impact is a ...