At least one extrasolar planet, , has been claimed to have such a weather system, similar to the Great Red Spot but twice as large.
Planetary atmospheres are affected by the varying or internal energy, leading to the formation of dynamic such as on Earth , planet-wide on Mars , a greater-than-Earth-sized on Jupiter called the , and on Neptune.
However, for , their proximity to their stars means that they are i.
One reason for the dissent is that often it may not be possible to determine the formation process.