For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical ...

Named for the maiden-snatching, shadow-dwelling god of the underworld, the small but mighty planet Pluto is associated with destruction, subversion, depth, intensity, primal urges, the taboo ...

According to a recent YouGov poll, 35% of Americans think Pluto is not a planet. But they are all wrong—kind of. To get to the bottom of whether Pluto is a planet, I tracked down planetary scientist ...

Whereas a moon usually orbits a planet, both Pluto and Charon orbit a point in ... produced the debris that formed the system's four small moons: Nix, Styx, Kerberos and Hydra.

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

It was just one of many small icy bodies in the Kuiper ... like objects led scientists to question whether Pluto should remain classified as a planet. In 2006, the IAU introduced a new definition ...