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Pluto
Pluto is the second-largest known dwarf planet in the Solar System.
From the time of its discovery in 1930 until 2006, Pluto was considered the Solar System's ninth planet.
Courtesy NASA/JPL-Caltech
orbit: 5,913,520,000 km (39.5 AU) from the Sun (average)
diameter: 2274 km
mass: 1.27e22 kg
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