The Solar System
Pluto
A dwarf planet in the Kuiper Belt, smaller than our Moon, with a heart-shaped plain of nitrogen ice.
- Size
- 2,377 km across. About 19% as wide as Earth.
- One year
- 248 Earth years
- One day
- 6.4 Earth days
- Moons
- Five, the largest is Charon
- Spacecraft
- New Horizons flew past on 14 July 2015.
Sizes and periods from NASA’s planetary fact sheets; moon counts from NASA Science.