Almost exactly one year after discovering dwarf planet Pluto's fourth moon -- though not before actually naming poor little P4 -- NASA announced Wednesday a fifth moon has been discovered orbiting the ex-planet.
Photographer: NASA
Posted: 02/12/2013
You can help SETI Institute name the smallest moons of Pluto. Two previously unknown moons of Pluto were discovered by the Hubble Space Telescope in 2011 and 2012.
Visit www.plutorocks.com to vote for your favorite name. Voting ends Monday, February 25, 2013.
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