Galilean

The Galilean moons are the four moons of Jupiter that were discovered by Galileo Galilei in the 17th century.

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

Galileo discovered that the Milky Way is made of many stars and that the Moon has hills. He discovered four moons in orbit around Jupiter, which are now known as the Galilean satellites.

Callisto, the outermost of the four Galilean moons, has an old surface that is perhaps the most heavily cratered of any object in the solar system.

The people of Galilee are not precise in their speech. What does this mean? There was a certain man of Galilee who would say, "Who has amar? Who has amar?" They would say to him, "Foolish Galilean, do you mean a donkey (ḥamor) to ride, or wine (ḥamar) to drink, wool (amar) to wear or a lamb (imar) to slaughter?"

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