Europa is one of Jupiter's largest moons and is the sixth-largest moon in the solar system. It was discovered in 1610 by the Italian astronomer Galileo Galilei and is one of the four largest moons of Jupiter, known as the Galilean moons, which also include Io, Ganymede, and Callisto. Europa is especially notable for several reasons: 1. **Icy Surface**: Europa has a smooth, icy surface that is believed to be mainly composed of water ice.
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