2017年09月04日:从内往外看到的土星环-（Saturn's Rings from the Inside Out）

2017年09月04日:从内往外看到的土星环-（Saturn's Rings from the Inside Out）--原图下载

Video Credit: NASA,JPL-Caltech, Space Science Institute
说明: 从土星看出去，土星环系的景观何似？随着卡西尼号太空船即将完成它的任务，它所拍摄的影像也提供人类前所未见的视点。在卡西尼号进入盛大告别轨道之前，所有土星壮丽环系的影像，都是由环系的外面往内看。上面嵌图所呈现的精采影片，则是摄于周围动画所呈现的太空船位置。複杂行星环的细部结构，在这部短片开头就清楚可见，而影片结束时，则可见证行星环的厚度真是纤薄如纸。这些主题影像摄于8月20日。在9月15日接受指令跃入这颗巨行星之前，卡西尼号的土星任务只剩下数个轨道。

原文：

Video Credit: NASA,JPL-Caltech, Space Science Institute
Explanation: What do Saturn's rings look like from Saturn?Images from the robotic spacecraft Cassini are providing humanity with this unprecedented vantage point as it nears the completion of its mission.Previous to Cassini's Grand Finale orbits, all images of Saturn's majestic ring system were taken from outside of the rings looking in. Pictured in the inset is the remarkable video, while the spacecraft's positions are depicted in the surrounding animation. Details of the complex rings are evident as the short time-lapse sequence begins, while the paper-thin thickness of the rings becomes apparent near the video's end.The featured images were taken on August 20.Cassini has only a few more orbits around Saturn left before it is directed to dive into the giant planet on September 15.