Definitions for "Galilean satellites"
The four brightest satellites of Jupiter, discovered by Galileo.
The four large satellites of Jupiter: Io, Europa, Callisto, and Ganymede, so named after Galileo Galilee who discovered them.
The four brightest and largest moons of Jupiter (Io, Europa, Ganymede, Callisto), named after Galileo Galilei, the 17th century astronomer who first observed them.