The Green Flash: The Second of Green Light That Made Sailors Believe in Magic
About 6 min readFor one or two seconds, as the last sliver of the setting Sun disappears, its upper edge can turn a brilliant, unearthly green. Sailors swore by it, Jules Verne built a novel around it, and for decades scientists argued about whether it was real at all. It is real — and the explanation is a beautiful piece of physics.