* Size: Charon is so large relative to Pluto that the two are often considered a binary system, meaning they both orbit a common center of gravity located between them.
* Distance: Charon orbits Pluto at a distance of about 19,640 kilometers (12,200 miles).
* Surface: Charon has a diverse surface, including:
* Canyons: Much deeper than the Grand Canyon on Earth.
* Mountains: Evidence of tectonic activity.
* A reddish north pole: Likely due to the presence of tholins, complex organic molecules formed by the interaction of sunlight and methane.
* No Atmosphere: Charon has no significant atmosphere.
* Rotation: Charon is tidally locked to Pluto, meaning it always shows the same face towards Pluto.
Why it matters: Charon's discovery in 1978 revolutionized our understanding of Pluto. It showed that Pluto wasn't a solitary object but part of a complex system. The close relationship between Pluto and Charon has also provided insights into the formation and evolution of planetary systems.
Fun Fact: Charon is named after the ferryman of the underworld in Greek mythology, who carried souls across the River Styx.
