Voyager 2 spacecraft image of the planet Neptune, taken between August 16 & 17, 1989, as the spacecraft approached its pass to within 5,000km of Neptunes north pole. This virtually truecolour image shows two prominent cloud features of Neptunes highly active weather system. At left is the Great Dark Spot, a giant storm system located at a latitude of 22 degrees south that circuits the planet every 18.3 hours. The bright clouds below & to its right were found to change appearance in periods as short as four hours. A second, smaller dark spot (bottom right) circuits the planet every 16.1 hours.