The weather on Neptune - HST

Caption NASA originale:"Using powerful ground and space-based telescopes, scientists have obtained a moving look at some of the wildest, weirdest weather in the Solar System. Combining simultaneous observations of Neptune made by HST and NASA's Infrared Telescope Facility on Mauna Kea, a team of scientists led by Lawrence A. Sromovsky (University of Wisconsin-Madison) has captured the most insightful images to date of a planet whose blustery weather - monster storms and equatorial winds of 900MPH! - bewilders scientists. Blending a series of HST images, Sromovsky's team constructed a time-lapse rotation movie of Neptune, permitting scientists to watch the ebb and flow of the distant planet's weather. And while the observations are helping scientists tease out clues to the planet's stormy weather, they also are deepening some of Neptune's mysteries. The weather on Neptune, is an enygma: the mechanism that drives its near-supersonic winds and giant storms has yet to be discerned! On Earth, weather is driven by energy from the sun as it heats the atmosphere and oceans. On Neptune, the sun is 900 times dimmer and scientists have yet to understand how Neptune's weather-generating machinery can be so efficient".