One of several known moons of the distant dwarf planet Pluto.
Charon's diameter of 1,200km is small in comparison to other bodies in the Solar System,
but still makes it approximately half the diameter of its parent planet,
which it orbits every 6.4 days. Pluto was the god of
the underworld, and Charon is appropriately named from the ferryman who rowed the dead across the River Styx to the