Science
Cassini discovered Saturn's rings weren't solid
HERE’S THE INTERESTING PART
Early astronomers stubbornly thought the ring around Saturn was one completely solid, unyielding disk of material. Giovanni Cassini noticed distinct dark gaps within the structure, concluding it had to be a massive swarm of tiny disconnected particles. He expertly shattered the illusion of a smooth cosmic hula-hoop with sheer optical precision.
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