Pluto moons get new names

The recently discovered fourth and fifth moons of Pluto now have official names: Kerberos and Styx. The International Astronomical Union (IAU), charged with making official name designations, stipulates in its rules that names derive from mythology. The names - referring to a three-headed dog and a river separating the living from the dead, ranked second and third in an international public vote. The two moons, formerly known simply as P4 and P5, were only discovered in July 2011 and July 2012, respectively.Both were spotted by a team using the Hubble space telescope, led by Mark Showalter, senior scientist at the Seti Institute.
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