Camera obscura used to study sunspots

Camera obscura used to study sunspots

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Credit: Universal History Archive/UIG/SCIENCE PHOTO LIBRARY

Caption: Projecting the sun's image through a refracting telescope onto a screen in a darkened room (camera obscura) in order to study sunspots. From Selenographia by Johannes Hevelius (Gedani, Gdansk. Danzig, 1647). Engraving.

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Keywords: 1647, astronomical, astronomy, camera, danzig, darkened, engraving, gdansk, gedani, hevelius, image, instrument, johannes, obscura, onto, order, projecting, refracting, room, science, screen, selenographia, study, sun, sunspots, telescope, through

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