Recorded under clear, dark skies from the hills near Chiuduno, Italy this composite eclipse image uses successive pictures from totality (center) and partial phases to trace out a large part of the umbra’s curved edge. Reflecting sunlight scattered by the atmosphere into Earth’s shadow, the lunar surface appears reddened during totality. But close to the umbra’s edge, the limb of the eclipsed Moon shows a distinct blue hue. The blue eclipsed moonlight originates as rays of sunlight pass through layers high in the upper stratosphere, colored by ozone that scatters red light and transmits blue.
Image & info via APODhttps://apod.nasa.gov/apod/astropix.html
Image Credit & Copyright: Antonio Finazzi