sciencehabit writes: Using one of the world's most powerful lasers, physicists have found experimental evidence for Saturn's helium 'rain,' a phenomenon in which a mixture of liquid hydrogen and helium separates like oil and water, sending droplets of helium deep in the planet's atmosphere. The results show the range of blistering temperatures and crushing pressures at which this takes place. But they also suggest that a helium rain could also fall on Jupiter, where such behavior was almost completely unexpected.
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