A black and white photo of an aurora, which appears as a nebulous, veil-like cloud in a dark sky.
https://files.mastodon.social/media_attachments/files/111/704/223/741/653/741/original/42125e15e88a129b.jpeg
German astronomer Martin Brendel took the first known photograph of an aurora #OTD in 1892, at Alta fjord in northern Norway.
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