Hydra (moon) the Hydra, the nine-headed serpent that battled Heracles in Greek mythology. The nine heads of Hydra are a reference to Pluto's tenure as the ninth planet; its initial, "H", refers to the Hubble Telescope, which discovered Hydra and, together with Nix, to the "New Horizons" mission whose safe passage was the motivation for taking the Hubble images. Hydra orbits the barycenter of the system in the same plane as Charon and Nix, at a distance of about 65,000 km. Its eccentricity of 0.0059 is small, but significantly non-zero, and the largest of those of Pluto's small moons (slightly larger than
Centaurus (Greek mythology) his life. Zeus took pity on the centaur and let him die. To honor him, Zeus gave Chiron a place amongst the stars. Centaurus (Greek mythology) In Greek mythology, Centaurus is the father of the race of mythological beasts known as the centaurs or Ixionidae. The centaurs are half-man, half horse; having the torso of a man extending where the neck of a horse should be. They were said to be wild, savage, and lustful. It was stated that after Ixion fell into insanity and was ostracized by his country, Zeus sympathized greatly with Ixion and brought him up to