Journey Into Space: Gravity, Orbits, and Collisions
Space Astronomy and Space
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Diameter: 3.7 billion miles across
Location: 9th planet from Sun
Distance from Sun: About 2.7 to 4.6 billion miles
First observed: 1930
Average Surface Temperature: -356 Fahrenheit
Number of Moons: 1
Orbital Period: 248 years
Identity in Mythology: Pluto, the Roman god of the underworld
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