Ganymede: The Solar System’s Largest Moon

Ganymede is the largest moon in the solar system, even bigger than Mercury.
It’s the only moon known to have its own magnetic field.
Ganymede’s surface is a mix of bright icy regions and darker, cratered areas.
Long grooves and ridges reveal past tectonic and geological activity.
Scientists believe a subsurface saltwater ocean may exist beneath its icy crust.
Its magnetic field interacts with Jupiter’s, creating spectacular auroras.
Ganymede’s thin atmosphere contains traces of oxygen, but it’s not breathable.
It was discovered by Galileo Galilei in 1610, along with Jupiter’s three other large moons.
At over 3,270 miles wide, it’s nearly half the size of Earth.
NASA’s upcoming Europa Clipper and ESA’s JUICE mission will study Ganymede in detail.