News Planetary Science

Pluto’s posse

By Ron Cowen

- More than 2 years ago

Images taken by the Hubble Space Telescope on Feb. 15 have confirmed that Pluto has two small, previously unknown moons. First detected by Hubble last year (SN: 11/5/05, p. 291:

New Partners: Hubble finds more moons around Pluto

), each moon is only about 50 kilometers across, less than one-hundredth the size of Pluto’s giant moon Charon.

THREE’S COMPANY. Pluto and its two small, outlying moons, along with giant moon Charon.