Galileo Spots Jupiter's Moons: Universe Shakes
Galileo spotted three faint stars near Jupiter that shifted positions nightly, proving they orbited the giant planet rather than Earth. This discovery shattered Aristotelian cosmology by revealing a second center of motion in the heavens, compelling astronomers to abandon geocentric models and accept a solar system where planets could have their own moons.
January 7, 1610
416 years ago
Key Figures & Places
What Else Happened on January 7
Caesar heard the Senate's ultimatum and grinned. Twelve years of political maneuvering had led to this moment. The tribunes Mark Antony and Quintus Cassius race…
The Byzantine palace looked more like a street brawl. Nikephoritzes, the tax collector everyone despised, was about to learn how much people hated him. Crowds s…
He was 26 and stepping into a kingdom shaped by his father's careful political maneuvering. Alfonso IV would become known as the Brave, but not for battlefield …
French forces under the Duke of Guise seized Calais, ending over two centuries of English rule on the continent. This swift victory stripped England of its fina…
He wasn't born royal. Boris Godunov clawed his way from court advisor to absolute monarch through a web of cunning and calculated moves. And when Tsar Feodor I …
The entire settlement went up like kindling. Just nine years after its founding, Jamestown—the first permanent English colony in North America—burned to the gro…
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