Pluto's fourth and fifth moons, discovered in 2011 and 2012, have been named Kerberos and Styx, the International Astronomical Union (IAU) said on Tuesday. Formerly known as P4 and P5, the names were ...

Have you ever wondered who ruled beside the god of the underworld in Roman mythology? While Pluto is often remembered as the ruler of the realm of the dead, he was not alone. By his side stood ...