What Are Clouds Made Of?
10. Other Planets
Other planets tend to have rather similar “water” cycles to our own, with some key differences. Rain will evaporate, condense, and then return to the planet under the force of gravity. Unlike on Earth, however, the “water” is often not H2O like it is on our planet, but different chemicals altogether. On Saturn and Jupiter, for example, the planets have clouds of ammonia.
In Venus, it is sulfur-dioxide that make the planets clouds. Sulfuric acid falls as rain on Venus but it doesn’t reach the surface. On Titan, Saturns largest moon, it is thought that there are whole lakes of liquid methane and ethane.
