|
Callisto
is the outermost of Jupiter's large moons. Only
slightly smaller than the planet Mercury, (roughly 3000 miles in
diameter) Callisto is the most heavily cratered moon in the solar
system.
With
the oldest surface in our solar system, Callisto's
exterior still displays the elements it was born with over
four billion years ago.
Though
the geology of Callisto remains a mystery, there is evidence that
below its ancient, icy surface may lay a narrow salty ocean.
|