Pluto Moon Hydra

The Hydra spectrum is similar to that of Pluto's largest moon, Charon, which is also dominated by crystalline water ice.

NASA's New Horizons spacecraft has sent first-ever data about Pluto's four moons that shows that the surface of Hydra is dominated by nearly pristine water ice.

The Hydra spectrum is similar to that of Pluto's largest moon, Charon, which is also dominated by crystalline water ice.

NASA's New Horizons spacecraft has sent first-ever data about Pluto's four moons that shows that the surface of Hydra is dominated by nearly pristine water ice.