CAPE CANAVERAL, Fla. – Want to name Plutos two tiniest moons? Then youll need to dig deep into mythology.
Astronomers announced a contest Monday to name the two itty-bitty moons of Pluto discovered over the past two years.
Pluto is the Roman equivalent of the Greeks Hades, lord of the underworld, and its three bigger moons have related mythological names: Charon, the ferryman of Hades; Nix for the night goddess; and the multiheaded monster Hydra.
The two unnamed moons – no more than 15 to 20 miles across – need similarly shady references. Right now, they go by the bland titles of P4 and P5.
Online voting will last two weeks, ending Feb. 25. Twelve choices are available for voters at the website www.plutorocks.com.
Among the choices: Hercules, the hero who slew Hydra; Obol, the coin put in the mouths of the dead as payment to Charon; Cerebrus, the three-headed dog guarding the gates of the underworld; Orpheus, the musician and poet who used his talents to get his wife, Eurydice, out of the underworld only to lose her by looking back: Eurydice; and Styx, the river to the underworld.
As of Monday afternoon, Styx and Cerebrus were leading. The vote tally is updated hourly.
The Greeks were great storytellers, and they have given us a colorful cast of characters to work with, said Mark Showalter, senior research scientist at SETI Institutes Carl Sagan Center in Mountain View, Calif.
Showalter and other astronomers who discovered the two mini-moons using the Hubble Space Telescope will make the winning selections.
Write-in name suggestions are welcomed, but they need to come from Greek or Roman mythology and deal with the underworld.