Until a few years ago, dwarf planet Pluto had only three known moons: Charon, Nix and Hydra. In 2011 and 2012, two more moons were discovered. Astronomers would now like some help naming these two new moons.
“By tradition, the moons of Pluto have names associated with Hades and the underworld,” so the ballot options include Acheron, Alecto, Cerberus, Erebus, Eurydice, Hercules, Hypnos, Lethe, Obol, Orpheus, Persephone, Styx and Vulcan. Write-in suggestions may also be added to the ballot before it closes. (Vulcan was added after being suggested by none other than William Shatner, for instance.)
Right now, Styx and Cerberus are in the lead.
Vote here, up to once per day, until February 25.
The official picks — which may or may not match the public’s top two choices — “will be announced after their formal approval by the International Astronomical Union.”