The mean diameter of Pluto is about 1.96 times the mean diameter of Charon. Selected basis: approximate values.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.
1,212 km - Mean diameter; approximate.
Charon is a natural satellite of Pluto, composed mainly of rock and water ice.
Rounded mean-radius model of Charon. The derived area and volume describe a sphere; surface terrain and flattening are omitted.
NASA JPL — Planetary satellite physical parameters2,377 km - Mean diameter; approximate.
Pluto is a dwarf planet in the Kuiper Belt, composed of rock and ice and orbiting the Sun.
Mean-radius spherical model for Pluto; actual shape is not perfectly spherical.
NASA JPL — planetary physical parameters
There’s always another scale
SpaceCharon1,212 kmCharon is a natural satellite of Pluto, composed mainly of rock and water ice.
SpacePluto2,377 kmPluto is a dwarf planet in the Kuiper Belt, composed of rock and ice and orbiting the Sun.
SpaceMoon3,475 kmThe Moon is Earth’s natural satellite and the brightest large object in Earth’s night sky.
SpaceEarth12,740 kmEarth is the rocky planet on which we live and the third planet from the Sun.
SpaceJupiter139,800 kmJupiter is a giant planet composed mainly of hydrogen and helium, orbiting the Sun beyond the asteroid belt.
SpaceSun1,391,000 kmThe Sun is the star at the centre of the Solar System.Side by side
Illustrative artwork · not to scale
Illustrative artwork · not to scale
Illustrative artwork · not to scale
Illustrative artwork · not to scaleGot a good eye for scale?