Copyright:Dominique Dierick
原文:
This sharp telescopic snapshot caught late September’s Harvest Moon completely immersed in Earth’s dark umbral shadow, at the beginning of a total lunar eclipse. It was the final eclipse in a tetrad, a string of four consecutive total lunar eclipses. A dark apparition of the Full Moon near perigee, this total eclipse’s color was a deep blood red, the lunar surface reflecting light within Earth’s shadow filtered through the lower atmosphere. Seen from a lunar perspective, the reddened light comes from all the sunsets and sunrises around the edges of a silhouetted Earth. But close to the shadow’s edge, the limb of the eclipsed Moon shows a distinct blue hue. The blue eclipsed moonlight is still filtered through Earth’s atmosphere though, originating as rays of sunlight pass through layers high in the upper stratosphere, colored by ozone that scatters red light and transmits blue.
中文翻譯:
這個銳利的望遠鏡快照捕捉了九月底的豐收月完全浸入地球黑暗的影umbra，在一次全食月食的開始。這是一次四連串全食月食的最後一個月食。作為一個接近 perigee 的黑暗幻影，這次全食的顏色呈深紅色，月球表面反射的是經過地球大氣層過濾的光線。從月球的角度看，變紅的光來自所有夕陽和日出的邊緣，映襯著一個輪廓鮮明的地球。然而，在陰影邊緣附近，經食的月球邊緣顯示出明顯的藍色色調。這種藍色的月光仍然是透過地球大氣層過濾的，源於陽光穿過高層平流層的層次，這些光線經過臭氧的影響散射紅光而傳輸藍光。
#HarvestMoon #TotalLunarEclipse #BloodMoon #LunarTetrad #Astronomy #MoonLovers #SkyWatching #Perigee #CosmicBeauty #EarthShadow #OzoneEffect #Astrophotography #LunarPerspective #CelestialEvents
來源:NASA每日圖片
