. English: Engraving of an instrument to observe sunspots. From 'Rosa Ursina, sive sol ex admirando facularum & macularum suarum phoenomeno varius' by Christoph Scheiner (1573-1650) . between 1626 and 1630. Christoph Scheiner (1573-1650) 581 Sunspot instrument of Christoph Scheiner (1573-1650)


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Keywords: ., /, /., 1626, 1630., christoph, scheiner