Who discovered the four largest moons of Jupiter?
Archimedes 
Johannes Kepler
Galileo Galilee
Nicolaus Copernicus
The Galilean moons are the four largest moons of Jupiter—Io, Europa, Ganymede, and Callisto. They were first seen by Galileo Galilei in December 1609 or January 1610, and recognized by him as satellites of Jupiter in March 1610.
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Archimedes 
Johannes Kepler
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Nicolaus Copernicus
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