New theories suggest that it rains on Jupiter and Saturn, just not in the way you’d think it would. Since the gas giants are structurally different from the Earth, their rain isn’t made up of water, nor do they fall through an atmosphere; instead, “raining” is when helium droplets fall through liquid metallic hydrogen. How do we know this? Scientists simulated the conditions on Jupiter and found that helium and hydrogen separated, with the former forming droplets which could possibly precipitate into rain.
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