The Rains of Enceladus

The Herschel spacecraft, launched by the European Space Agency, has determined that water in the upper atmosphere of Saturn comes from the moon Enceladus, which orbits approximately 238,000 km from the planet. Enceladus spews water into space at a rate of 250kg/s. Scientists estimate that between 3-5% of that is captured by Saturn, which is enough to account for the levels of water found in Saturn’s atmosphere.

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