pluto
| orbit length: | 248 earth years |
| mass: | (1.303±0.003)x10^22 kg |
| mi from sun: | 3.7 billion mi |
| core: | rock and ice |
Pluto is no longer considered a planet by astronomers, but is the ninth larget celestial object to orbit our sun; it is offically called a dwarf-planet. Pluto's surface is made mostly of ice and rock and has 1/6 the mass of Earth's moon. Though it has a very small mass, it has 5 known moons.
The name Pluto comes from the Roman god of the underworld, known as Hades in Greek mythology.
The surface tempurature of Pluto can range from -375 to -400 degrees F.
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