Ganymede

The four Galilean moons are called: Io, Europa, Ganymede and Callisto.

One of Jupiter's moons, Ganymede, is larger than the planet Mercury.

Ganymede, Jupiter’s largest moon, also has its own magnetic field and magnetosphere—making it the only moon with one.

Still deep in her heart rankled the judgment of Paris and the injustice of her scorned beauty, and the hated race, and the honors of kidnapped Ganymede.

The choice of Paris, and her charms disdained, / the hateful race, the lawless honours ta'en / by ravished Ganymede – these wrongs remained.

Jupiter's Ganymede moon is about 5,270 kilometers in diameter, almost half that of Earth.

It is possible that Ganymede contains more water in the form of ice than all of the liquid water in the oceans of planet Earth.

The Galilean moons revolve around Jupiter and are four: Ganymede, Callisto, Io and Europa.

Overcoming severe radiation damage, the redoubtable orbiter has deployed a probe into Jupiter's atmosphere; studied the hottest volcanoes in the Solar System on Jupiter's moon Io; discovered evidence of subsurface oceans on the moons Europa and Ganymede; and provided new insights into the giant planet's stormy atmosphere, gigantic magnetosphere and energetic particle environment.

Ganymede was a shepherd.