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Pluto

Pluto is a dwarf planet and an icy chunk of rock. It has a reddish surface made of water, nitrogen and methane ice. Pluto has a very excentric orbit, which in part takes it closer to the Sun as Neptune.

Distance from the Sun: 29 - 49 AU
Mass: 0.0021 * Earth
Diameter: 0.179 * Earth (2274 km)
Surface temperature: 50 kelvin
Orbit period: 248 years = 90465 days
Moons: 5 (Charon, Nix, Hydra, Kerberos, Styx)

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Photo: Eliot Young (SwRI) et al., NASA
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