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Why the eclipse of the Moon? (2)
Rome, Italy - The answers to some questions
L=0: Very dark eclipse. Moon almost invisible, especially at mid-totality. L=1: Dark Eclipse, gray or brownish in coloration. Details distinguishable only with difficulty. L=2: Deep red or rust-colored eclipse. Very dark central shadow, while outer edge of umbra is relatively bright. L=3: Brick-red eclipse. Umbra shadow usually has a bright or yellow rim. L=4: Very bright copper-red or orange...
AVIONEWS - World Aeronautical Press Agency