Sunspots. Scheiner's observations of the passage of a sunspot across the solar disk, May 1625. From 'Rosa Ursina' by Christoph Scheiner (Bracciano, 1630). Engraving.

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Keywords: ., 1625., archival, archive, astronomy, christoph, disk, engraving., historical, history, observations, passage, rosa, scheiner, scheiners, science, solar, sunspot, sunspots, sunspots., ursina