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 to prove, as in the case of the Greek Moirai and the Norns of Norse mythology. It appears that the Mycenaean religion was the mother of the Greek religion and its pantheon already included many divinities that can be found in classical Greece. However, Greek mythology is generally seen as having heavy influence of Pre-Greek and Near Eastern cultures, and as such contains few important elements for the reconstruction of the Proto-Indo-European religion. Consequently, Greek mythology received minimal scholarly attention in the context of Indo-European comparative mythology until the mid 2000s. Archaeology and mythography have revealed influence from Asia Minor