present as an important addition to the mainly nitrogen atmosphere, is methane. Injection of methane into the atmosphere from cryovolcanic eruptions and its subsequentcondensationas “rain” is one possible explanation for the depressions looking strikingly like river valleys imaged on Titan's surface ...
Winds in the atmosphere cause cloud markings on the visible surface to rotate around the planet with periods ranging from 18 hours near the equator to slightly more than 14 hours at higher latitudes. The atmosphere Molecular hydrogen and atomic helium are the two main constituents of the Uranian...