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Resolvido mistério de 1.400 anos de estranho ‘sinal vermelho’ no céu do Japão

Home News Skywatching What might the "red sign" have looked like? (Image: © Illustration: Space.com; Aurora: Nora Carol/Getty) A scarlet fan spread across the skies over Japan 1,400 years ago, and it's been puzzling astronomers ever since.According to historical records, on Dec. 30, 620, a "red sign" shaped like "a pheasant tail" appeared in the…

Mistério resolvido: A origem das cores nas primeiras fotografias coloridas

Edmond Becquerel, Solar spectra, 1848, photochromatic images, Musée Nicéphore Niépce, Chalon-sur-Saône. A palette of colors on a silver plate: That is what the world's first color photograph looks like. It was taken by French physicist Edmond Becquerel in 1848. His process was empirical, never explained, and quickly abandoned. Now, a team at the Centre de…
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