⚪ Dwarf planet
Pluto
The famous former planet, with a giant heart of ice.
- Size
- 2,400 km across, 19% as wide as Earth
- A day lasts
- 6.4 Earth days, spinning backwards
- A year lasts
- 248 Earth years
- Moons
- 5
- Average temperature
- −230 °C
- From the Sun
- 5.9 billion km
- Discovered
- 1930
Did you know?
- The New Horizons spacecraft flew past it in 2015, after a trip of nine and a half years.
- It has not finished one lap of the Sun since it was discovered.
Photographed or visited by
New Horizons
Nine years to Pluto, for one day of pictures.
Compare Pluto with EarthSide by side, to scale, in the app
More NASA photos of PlutoStraight from NASA’s image library, in the app
Explore more
All of solar system
Mercury
The smallest planet, and the closest to the Sun.
Venus
The hottest planet, hidden under thick clouds.
Earth
Our home, the only world known to have life.
Mars
The red planet, with the tallest volcano in the solar system.
Jupiter
The biggest planet, with a storm larger than Earth.
Saturn
The ringed giant, light enough to float in water.