planetΓÇÖs rotation, the fastest in the solar system (a Jovian ΓÇ£dayΓÇ¥ is just under ten Earth hours).
The reddish clouds in this im- mense storm in JupiterΓÇÖs southern hemisphere completely rotate once about every six days. Although the region has been studied extensively from both the Earth and the Voyager spacecraft, its true nature remains enigmatic. The exact cause of its color is also unknown, but is thought to be the effect of light- induced chemical reactions that produce color-causing substances known as hydrocarbons.
