This structure is thought to be at least 300 years old since it appears in a painting by Donato Creti.
P. B. Molesworth found that this structure regularly interacts with the South Tropical Disturbance, increasing its speed whenever they come in contact. This structure is thought to be at least 300 years old since it appears in a painting by Donato Creti. Voyager's observation of this structure showed that UV light breaks down the phosphine within it, which may explain why this feature's temperature of approximately 115 kelvins is 10 kelvins cooler than the (*)  region surrounding it. The Oval BA is smaller, but similar to, this structure, which can be found alongside brown ovals and white ovals within "bands" and "zones" of differing colors. For 10 points, what anticyclonic system larger than the size of Earth is a storm in Jupiter's atmosphere?
P. B. Molesworth found that this structure regularly interacts with the South Tropical Disturbance, increasing its speed whenever they come in contact.
Great Red Spot  [prompt on partial answer]