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2018February 26

Cyclonesat Jupiter's North Pole

ImageCredit: NASA, JPL-Caltech, SwRI, ASI, INAF, JIRAM

Explanation:Juno's Jovian Infrared Auroral Mapper data was used to construct this stunningview of cyclones at Jupiter's North Pole. Measuring the thermal emission fromJovian cloud tops, the infrared observations are not restricted to thehemisphere illuminated by sunlight. They reveal eight cyclonic features thatsurround a cyclone about 4,000 kilometers in diameter, just offset from thegiant planet's geographic North Pole. Similar data show a cyclone at the JovianSouth Pole with five circumpolar cyclones. The South Pole cyclones are slightlylarger than their northern cousins. Cassini data has shown that gas giantSaturn's north and south poles each have a single cyclonic storm system.

木星北極的氣旋

解釋：朱諾飛船的木星紅外冕制圖數(shù)據(jù)被用來構建這幅木星北極氣旋的影像。測量數(shù)據(jù)來自木星云端的熱輻射。它們揭示出八個氣旋特征，共同圍繞著一個直徑約4000公里的氣旋，恰好出現(xiàn)在這顆巨行星的地理北極。相似的數(shù)據(jù)顯示，木星南極具有5個繞極氣旋。南極氣旋比它們的兄弟北極氣旋略大。卡西尼飛船的數(shù)據(jù)顯示，氣態(tài)巨行星土星的北極和南極都有一個氣旋風暴系統(tǒng)。