Saturn’s rings mess with the gas giant’s atmosphere

Shadows and ‘ring rain’ affect electron levels in the planet’s ionosphere, final Cassini data suggest

Saturn’s rings

BLOCKING THE SUN  Saturn’s rings cast a shadow on the gas giant’s charged upper atmosphere, blocking ionizing rays as well as visible light.    

JPL-Caltech/NASA, Space Science Institute

NEW ORLEANS — Saturn’s mighty rings cast a long shadow on the gas giant — and not just in visible light.