DPS 2015: Pluto's Small Moons Styx, Nix, Kerberos, and Hydra [UPDATED] #1 Post by happyscrappy » Wed, Nov 18, 2015, 2:55 PM UTC DPS 2015: Pluto's Small Moons Styx, Nix, Kerberos, and Hydra [UPDATED]planetary.org