Refracting telescope on a very simple equatorial mounting being used in a darkened room (camera obscura) in order to project the Sun's image so that sunspots could be studied. From 'Rosa Ursina' by Christoph Scheiner (Bracciano, 1630). Engraving.

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Refracting telescope on a very simple equatorial mounting being used in a darkened room (camera obscura) in order to project the Sun's image so that sunspots could be studied. From 'Rosa Ursina' by Christoph Scheiner (Bracciano, 1630). Engraving.

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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., archival, archive, astronomy, darkened, engraving., equatorial, historical, history, instrument, mounting, refracting, room, science, scientific, simple, telescope