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
Greek mythology in popular culture called Trojans. The use of Greek mythology in children's television shows is credited with helping to bring "the great symbols of world literature and art" to a mass audience of children who would otherwise have limited exposure. Children's programming has included items such as a recurring segment on CKLW-TV where Don Kolke would be dressed up as Hercules and discuss fitness and Greek mythology. The Battlestar Galactica franchise (particularly the 2004 television series) developed from concepts that utilized Greek mythology and the series "Heroes", played on the concept of the new generation of gods overthrowing the old. The television series