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On this day in space! Oct. 25, 1671: Astronomer Giovanni Cassini discovers Iapetus, Saturn's 'yin-yang' moon

Space.com ·First reported 41m ago

On this day in space! Oct. 25, 1671: Astronomer Giovanni Cassini discovers Iapetus, Saturn's 'yin-yang' moon — Image: Space.com

On Oct. 25, 1671, the Italian astronomer Giovanni Cassini discovered a new moon at Saturn! Here's why it mattered.

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