Copyright:Rolf Olsen
原文:
Last week the Full Moon was completely immersed in Earth’s dark umbral shadow, just briefly though. The total phase of the April 4, 2015 lunar eclipse lasted less than 5 minutes, the shortest total lunar eclipse of the century. In fact, sliding just within the Earth’s umbral shadow’s northern edge, the lunar north stayed relatively bright, while a beautiful range of blue and red hues emerged across the rest of the Moon’s Earth-facing hemisphere. The reddened light within the shadow that reaches the lunar surface is filtered through the lower atmosphere. Seen from a lunar perspective it comes from all the sunsets and sunrises around the edges of the silhouetted Earth. Close to the shadow’s edge, the bluer light is still filtered through Earth’s atmosphere, but originates as rays of sunlight pass through layers high in the upper stratosphere. That light is colored by ozone that absorbs red light and transmits bluer hues. In this sharp telescopic view of totality from Auckland, New Zealand, planet Earth, the Moon’s north pole has been rotated to the top of the frame.
中文翻譯:
上星期的滿月完全浸入地球的暗面影子，但只持續了短暫的幾分鐘。2015年4月4日的月蝕中，完全月相階段持續了不到5分鐘，成為世紀中持續時間最短的全食月蝕。實際上，因為滑入地球的影子邊緣，月球的北極保持相對明亮，而其他面向地球的月球表面則出現了一系列美麗的藍色和紅色色調。進入影子的紅光通過下層大氣到達月球表面。從月球的視角看，這些光來自環繞著地球的所有日落和日出。靠近影子的邊緣，藍光仍然是通過地球氛圍過濾的，但來自於陽光穿過高層平流層的光線。這些光受臭氧的影響，吸收紅光並傳遞藍色色調。在這張來自新西蘭奧克蘭的銳利望遠鏡畫面中，地球的影子中，月球的北極已經被旋轉到畫面的頂部。
#月蝕 #滿月 #總月蝕 #天文學 #奧克蘭 #新西蘭 #美麗的光影 #天然奇觀
來源:NASA每日圖片
