Pluto has an atmosphere when it is close to perihelion; the atmosphere freezes out as Pluto moves further from the Sun.
Pluto has one natural satellite, Charon. Little is known about Pluto because of its great distance from Earth and because no exploratory satellites have visited Pluto yet.
The planet is named both for the Roman god Pluto, and for the astronomer Percival Lowell, who predicted that a planet would be found beyond Neptune.
Solar system:
Sun - Mercury - Venus - Earth - Mars - Asteroids - Jupiter - Saturn - Uranus - Neptune - Pluto - Comets
Pluto is the Roman god of the Underworld, who the Greeks called Hades. He abducted Proserpine (Gr. Persephone), and her mother Ceres (Gr. Demeter) caused winter in her grief.
Pluto is [Mickey Mouse]?'s pet dog. Unlike most of Disney?'s animated animal characters, Pluto does not talk.