Moons of Pluto
The first and largest moon discovered orbiting around Pluto was Charon, Charon was discovered on June 22 1978 by James Christy. In May 2005, the Hubble Space Telescope discovered two smaller moons which were named Nix and Hydra.  Two even smaller moons named Kerberos and Styx were discovered in 2011 and 2012.