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Salty grains in Saturn’s outer ring reveal a slow freeze
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Salty grains in Saturn’s outer ring reveal a slow freeze

Saturn’s outermost ring is fed largely by icy plumes erupting from its moon Enceladus. A new analysis finds that the ring’s varied icy and rocky grains may have formed as those plumes slowly froze. These tiny particles offer a fresh way to investigate the moon’s hidden subsurface ocean. And here's the thing: studying their composition could help scientists assess whether that ocean might be habitable.
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