Galileo's Moons: A New View of the Cosmos

On January 7, 1610, Galileo Galilei observed Jupiter's four largest moons, marking a pivotal moment in astronomy. This discovery challenged the Earth-centered Ptolemaic view and supported Copernicus's heliocentric theory, showing that celestial bodies can have their own systems. The implications were profound, leading to the birth of modern observational astronomy and conflicts with the Church, ultimately reshaping humanity's understanding of its place in the universe.

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