Researchers accounted for the previously overlooked structures of the dwarf planet and moon in computer simulations of a ...

When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

Scientists have discovered a new type of planetary collision called “kiss-and-capture,” where Pluto and proto-Charon briefly ...

This is an artist's impression of five of the dwarf planets. Some of them have moons, too. The first time you may have heard the term ‘dwarf planet’ was when Pluto got demoted to one in 2006 ...

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

Out past the orbit of Pluto, far from the warmth of the Sun, drifts a vast expanse of icy rocks and dwarf planets thought too cold to be little more than snowballs in outer space. As the New ...