A new study led by SETI Institute astronomers suggests that the recently-discovered moon of Neptune, Hippocamp, is probably an ancient fragment of a much larger neighboring moon, Proteus. An artist’s concept of Hippocamp. Image credit: NASA / ESA / J. Olmsted, STScI. During its 1989 flyby, NASA’s Voyager 2 spacecraft imaged six small moons of Neptune (Naiad, Thalassa, Despina, Galatea, Larissa, and Proteus), all with orbits well interior to that...
