Sunspots. Scheiners observations of the passage of a sunspot across the solar disk, May 1625. From Rosa Ursina by Christoph Scheiner Bracciano, 1630. Engraving. Editorial Stock Photo - Afloimages
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.