how big is neptune's great dark spot
Unlike Uranus, Neptune sometimes exhibits a dark spot known as âthe great dark spot.â The 8,000 mile long spot, which resembles Jupiterâs Great Red Spot, is a huge area of storm activity that is thought to represent a hole in Neptuneâs methane cloud. Unlike Jupiterâs spot, however, the great dark spot seems to have a much shorter life-span and is cloud-free in the middle. There have been several of these spots that have come and gone on Neptune since 1989. Winds in excess of 1,500 miles per hour have been recorded within the spot, making it the solar systemâs windiest place.