Various methods of observing sunspots, illustration from 'Rosa Orsina' by Christoph Scheiner, published 1630
German School, (17th century). Medium: engraving. Date: 17th Century. Christoph Scheiner (1575-1650), German geometer, physicist, and astronomer; Provenance: Private Collection. Photographic rights held by The Bridgeman Art Library.
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