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The International Astronomical Union names Pluto's fourth and fifth moons, Kerberos and Styx.
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International Astronomical Union
Association of professional astronomers
The International Astronomical Union is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded on…Source: Wikipedia (CC BY-SA)
Moons of Pluto
Natural satellites orbiting Pluto
The dwarf planet Pluto has five natural satellites. In order of distance from Pluto, they are Charon, Styx, Nix, Kerberos, and Hydra. Charon, the largest, is mutually tidally locked with Pluto, and is massive enough that Pluto and Charon are sometimes considered a binary dwarf…Source: Wikipedia (CC BY-SA)
Kerberos (moon)
Small natural satellite of Pluto
Kerberos, formal designation (134340) Pluto IV, is a small natural satellite of Pluto, about 19 km (12 mi) in its longest dimension. Kerberos is also the second-smallest moon of Pluto, after Styx. It was the fourth moon of Pluto to be discovered and its existence was announced…Source: Wikipedia (CC BY-SA)
Styx (moon)
Small natural satellite of Pluto
Styx, formal designation (134340) Pluto V, is a small natural satellite of Pluto whose discovery was announced on 11 July 2012. It was discovered by use of the Hubble Space Telescope, and is the smallest of the five known moons of Pluto. It was imaged along with Pluto and…Source: Wikipedia (CC BY-SA)