2017年06月22日:土卫六北半球的夏天-（Northern Summer on Titan）--原图下载
Image Credit: Cassini Imaging Team, SSI, JPL, ESA,NASA
说明: 昨天的夏至把夏天带到地球北半球，但对拥有行星环的土星而言，北半球的夏至降临在一个月前的5月24日。而持续追蹤土星季节的卡西尼号太空船，在6月9日拍下了上面这幅土星的大卫星──土卫六之影像。这张摄于507,000公里之外的近红外光照片，呈现了漂过土卫六夏季天空的甲烷云。在云层下方，可见到散布在受阳光照耀的土卫六北极区的暗色碳氢化合物湖泊。
原文：
Image Credit: Cassini Imaging Team, SSI, JPL, ESA,NASA
Explanation: While yesterday's solstice brought summer to planet Earth'snorthern hemisphere, a northern summersolstice arrivedfor ringed planet Saturn nearly a month ago on May 24.Following theSaturnianseasons, its large moon Titan wascaptured in this Cassini spacecraftimagefrom June 9.The near-infrared view finds bright methane clouds drifting throughTitan's northern summer skies as seen from a distance ofabout 507,000 kilometers.Below Titan's clouds, darkhydrocarbon lakes sprawl nearthe large moon's now illuminated north pole.
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