Already deemed the oddball among planets, Pluto just got a new wrinkle. Two, actually. This week, astronomers announced that the Hubble Space Telescope has spied a pair of previously unrecognized moons orbiting Pluto, giving this outer solar system body a total of three satellites. If the finding is confirmed, Pluto will be the only object beyond Neptune known to have more than one moon.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.