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The Hunt for Moons Beyond Our Solar System When Galileo refocused his telescope toward Jupiter in 1610 and saw four bitsy blotches moving around it, he intentionally began a revolution in how we view moons. For centuries, those four — Io, Europa, Ganymede, and Callisto were the only known natural satellites ringing another earth. Fast forward to moment we’ve discovered over 200 moons across our solar system. But the coming great vault in discovery is n’t within our own neighborhood it’s beyond. Astronomers now quest for exomoons — moons ringing globes around other stars. These worlds