Fig. 22: The Earth casts its shadow on the moon. On this picture the moon's part which is exposed to the sunlight is overexposured to show the different colours of the core shadow. The colours range from brown, red to blue and are caused by diffraction in the Earth's atmosphere. — Nikon D200, William Optics ZenithStar 105mm f/7, ISO 800, 1/2s, Ascona, 4 March 2007, 23:29 MEZ Nikon D200; Δt=1/2 s; ISO 800; 3 March 2006 23:29:11
