Helioscope,17th-century

Numéro d’image : 11879885
Helioscope,17th-century
Helioscope. Diagram of a helioscope,an instrument which was used for viewing the sun during the early 1600s. It works by projecting the image seen with a telescope onto a white piece of paper suspended in a darkened room. The first purpose built helioscope was designed by German astronomer Christoph Scheiner (1575-1650) to assist his sunspot observations. Sunspots are dark areas on the Sun's surface caused by fluctuating magnetic fields within the Sun. Scheiner was the co-discoverer of sunspots and published his great work,the 'Rosa Ursina',in the 1630s,from which this illustration was taken. It was the standard treatise on the subject for more than a century,containing numerous observations and also a detailed account of his methods and apparatus
Licence : Droits gérés
Crédit: Science Photo Library / Royal Astronomical Society
Taille de l’image : 3543 px × 4961 px
Model Release : Non requis
Property Release : Non requis
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