Composition & structure
Atmospheric composition: Methane, nitrogen
Magnetic field: It remains unknown whether Pluto has a magnetic field, but its small size and slow rotation suggest it has little to none.
Chemical composition: Probably a mixture of 70 percent rock and 30 percent water ice.
Internal structure: Probably a rocky core surrounded by a mantle of water ice, with more exotic ices such as methane and nitrogen frost coating its surface.
Credit: Karl Tate, SPACE.com
Orbit & rotation
Average distance from the sun: 3,670,050,000 miles (5,906,380,000 km) — 39.482 times that of Earth
Perihelion (closest approach to the sun): 2,756,902,000 miles (4,436,820,000 km) — 30.171 times that of Earth
Aphelion (farthest distance from the sun): 4,583,190,000 miles (7,375,930,000 km) — 48.481 times that of Earth
more at
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