Galileo Galilei: Discoverer of Jupiter's Four Moons

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Galileo Galilei: Discoverer of Jupiter's Four Moons - Io, Europa, Ganymede, Callisto

The discovery of the four moons of Jupiter (Io, Europa, Ganymede, and Callisto) is attributed to Galileo Galilei. He observed them using his telescope in 1610.

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