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The setting Sun descending into a fog bank looking due west, on the evening of the vernal equinox, March 20, 2023. The fog dims and reddens the Sun, illustrating atmospheric absorption, and refraction as the solar disk is quite flattened. A couple of sunspots are just visible. The colour gradient is natural and comes from the blend of fog below and clearer twilight sky above. ..This is a single exposure with the RF100-400mm lens at 400mm on the Canon R5. Autofocused on the Sun. (KEYSTONE/VWPICS/Alan Dyer )