Pluto's smallest moon may be named 'Vulcan'
PTI: New York, Feb 26 2013, 21:08 IST
first caught sight of Pluto's largest moon Charon in 1978, but it was not until 2005 that astronomers discovered two other moons (Nix and Hydra) using the Hubble Space Telescope.
The moon P5 was discovered in 2012, also using the Hubble telescope. The moon P4 was discovered in 2011. Both P4 and P5 are only 20 to 30 km in diameter.
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