Saturn's Clouds from Voyager 1 and Voyager 2

Caption NASA originale:"This comparison shows Saturn’s north temperate region as viewed on Nov. 5, 1980, by Voyager 1 (left) and Aug. 21, 1980, by its sister craft, Voyager 2, from a range of 5.000.000 Km; the large bright oval feature in the lower right of each frame measures about 2.500 Km. The largest bright feature in the Voyager 1 photograph extends about 7.500 Km from north to south. These giant storms lie within one of the strongest westward-flowing currents observed in the atmosphere, with wind speeds of about 20 mt p/s".