Jupiters Great Red Spot
When 17th-century astronomers first turned their telescopes to Jupiter, they noted a conspicuous reddish spot on the giant planet. This Great Red Spot is still present in Jupiter's atmosphere, more than 300 years later. It is now known that it is a vast storm, spinning like a cyclone.

Photo By: NASA, ESA, Hubble Heritage Team
Photo License: NASA - ESA