Fig. 21: Moon entering umbra core shadow: of the earth. The term "core shadow" means that in this part the whole Sun is behind the earth, so there is no direct sunlight. — Nikon D200, William Optics ZenithStar 105mm f/7, ISO 100, 1/60s, Ascona, 4 March 2007, 23:18 MEZ Nikon D200; Δt=1/60 s; ISO 100; 3 March 2006 23:18:31
