Our cover picture ...
… shows, at sunset on 22.07.2020 north west of Hiiumaa/Estonia, the ‘Etruscan vase’ (top 20:15:30 / 20:19:35 CET) and the green ray, which changed its color to cyan at the end within a few seconds (bottom: 20:20:02 / 20:20:04 / 20:20:05 / 20:20:06 / 20:20:08 CET). See also the article on page 216 in this issue. © Alexander Haußmann
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