SciShow Space on Youtube shows that on planet earth it rains water, on the exoplanet WASP-76b it rains liquid iron. But, no matter what planet you are on, raindrops have a lot more in common than you might think.
Rain on other planets has very different chemical compositions. On Venus it rains sulfuric acid. Dry ice snows on Mars, which is carbon dioxide in a solid state. Saturn’s moon Titan rains methane and on Jupiter it rains helium and ammonia hail.
There does appear to be rain falling from clouds on other planets, but it is not water. According to the results, diamond rain falls on Saturn, Neptune and Jupiter, among others, but Saturn may have the best conditions for this.
Planet Earth appears to be “the only planet” that has liquid water. There is indeed rain falling from clouds on other planets, but it is not water.
About 1,000 tons (907 tons) of diamonds per year fall on Saturn. It is still a novel theory. This is a theory of planetary scientists at NASA’s Jet Propulsion Laboratory. It seems not to be proven.
On Titan, Saturn’s largest moon, there are icy methane storms. Just like Earth has a water cycle, Titan has a methane cycle. There are seasonal rains. The methane rain fills the lakes. The lakes eventually evaporate and the vapor rises into the clouds, starting all over again. Methane is in its liquid form on Titan because the surface temperature is extremely cold, minus 290 degrees F (minus 179 C). There are also cold mountains of solid ice on Titan.
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