The fourth and fifth
moon of Pluto was officially called by popular vote Kerberos and Styx,
respectively, said today the International Astronomical Union (IAU).
The moons, discovered
in 2011 and 2012 were known at first as P4 and P5, but the team leader
responsible for the discovery, made by Hubble telescope observations from NASA,
decided to organize a contest to baptize.
