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Jupiter has sixty-nine moons. What is the largest known moon of Jupiter?

Retry Correct Incorrect Ganymede is Jupiter’s largest moon and it is even bigger than the planet Mercury in diameter. While many of us know the planets of our solar system, not many know the names of their moons.

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Space Frontiers/Hulton Archive/Getty Images

Space Frontiers/Hulton Archive/Getty Images

Jupiter has sixty-nine moons. What is the largest known moon of Jupiter?

• Ganymede
• Callisto
• Io
• Europa