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Galileo Galilei discovered the four main moons of Jupiter
Telescopic observations in 1610 provided direct evidence against geocentrism
In early 1610, Italian astronomer Galileo Galilei pointed an improved telescope toward Jupiter and identified four orbiting moons: Io, Europa, Ganymede, and Callisto. Published in his treatise Sidereus Nuncius, the discovery proved that celestial bodies could orbit planets other than Earth, challenging Aristotelian cosmology.
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Tags: galileo, jupiter, astronomy
Galileo Galilei discovered the four main moons of Jupiter: the short answers
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- Telescopic observations in 1610 provided direct evidence against geocentrism. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
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