2025年5月18日
https://www.nasachina.cn/wp-content/uploads/2025/05/PlutoFlyover_NewHorizons.h265.mp4
Pluto Flyover from New Horizons
Video Credit: NASA, JHUAPL, SwRI, P. Schenk & J. Blackwell (LPI); Music Open Sea Morning by Puddle of Infinity
Explanation: What if you could fly over Pluto — what might you see? The New Horizons spacecraft did just this in 2015 July as it shot past the distant world at a speed of about 80,000 kilometers per hour. Images from this spectacular passage have been color enhanced, vertically scaled, and digitally combined into the featured two-minute time-lapse video. As your journey begins, light dawns on mountains thought to be composed of water ice but colored by frozen nitrogen. Soon, to your right, you see a flat sea of mostly solid nitrogen that has segmented into strange polygons that are thought to have bubbled up from a comparatively warm interior. Craters and ice mountains are common sights below. The video dims and ends over terrain dubbed bladed because it shows 500-meter high ridges separated by kilometer-sized gaps. The robotic New Horizons spacecraft has too much momentum to ever return to Pluto and is now headed out of our Solar System.
Tomorrow’s picture: moon Charon
新视野号飞越冥王星
影片提供: NASA, JHUAPL, SwRI, P. Schenk & J. Blackwell (LPI); Music Open Sea Morning by Puddle of Infinity
说明: 如果能飞越冥王星，可能会见到什么？新视野号于2015年7月，曾以每小时约80,000公里的高速掠过这颗的遥远天体。摄于此次精采飞越的大量照片，在色泽经过强化、垂直高度经过夸大之后，以数位并接技术组合成这部全长2分钟的主题影片。在旅程开始之时，晨曦降临在咸认是由水冰所构成但表面受到氮冰着色的山岳区。紧接着在右方，可见到主要由固态氮构成、并分隔成一个个多边形的平坦冰海，它们据信是由相对温暖内部沸腾浮起的对流胞之余泽。在影片下方的原野里，撞击坑和冰质山岳是常见的景观。影片最后变暗并以刀锋昵称的原野告终，因为此区域有许多间隙约1公里、高约500米的山脊而获得此昵称。带着极高动量踏上远离 太阳系路程的新视野号探测器，不可能再回访冥王星。
明日的图片: moon Charon