丘留莫夫-格拉西缅科的雪
(原标题: The Snows of Churyumov-Gerasimenko)
2024-01-06
浏览次数: 18
当你站在67P/丘留莫夫-格拉西门科彗星的悬崖边时，你不可能真的被这场暴风雪困住。2016年6月，罗塞塔号航天器的窄角相机在绕彗星运行时，确实记录到了类似雪的尘埃和冰粒条纹，因为它们在靠近相机的视野和彗星表面上方漂移。尽管如此，场景中一些明亮的斑点可能是由于高能带电粒子雨或宇宙射线击中相机，以及大犬星座方向的密集恒星背景。在视频中，背景恒星很容易从上到下被发现。这一令人惊叹的电影是由罗塞塔号在25分钟内连续拍摄的33张照片组成的，当时罗塞塔号在距离彗星核心约13公里的地方巡航。2016年9月，“罗塞塔”号飞船成功地对67P/Churyumov-Gerasimenko进行了受控撞击，任务结束后，彗核成为了它的最后安息之地。
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You couldn't really be caught in this blizzard while standing by a cliff on periodic comet 67P/Churyumov-Gerasimenko. Orbiting the comet in June of 2016, the Rosetta spacecraft's narrow angle camera did record streaks of dust and ice particles similar to snow as they drifted across the field of view close to the camera and above the comet's surface. Still, some of the bright specks in the scene are likely due to a rain of energetic charged particles or cosmic rays hitting the camera, and the dense background of stars in the direction of the constellation of the Big Dog (Canis Major). In the video, the background stars are easy to spot trailing from top to bottom. The stunning movie was constructed from 33 consecutive images taken over 25 minutes while Rosetta cruised some 13 kilometers from the comet's nucleus. In September 2016, the nucleus became the final resting place for the Rosetta spacecraft after its mission was ended with a successful controlled impact on 67P/Churyumov-Gerasimenko.