Galileo Galilei
Galileo Galilei
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What happened with Galileo Galilei on 7 January, 1610

7 January, 1610

Galileo Galilei observed what he initially described as 'three fixed stars, totally invisible by their smallness,' near Jupiter. These observations marked the initial discovery of what would later be identified as three of Jupiter's four largest moons. This discovery challenged the prevailing geocentric view of the universe.
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