Sujet

How to construct a mounting for a refracting telescope

Légende

How to construct a mounting for a refracting telescope so that the Sun's image could be projected onto a screen and sunspots safely studied. A second screen at R blocked out indirect sunlight and made it possible to use the instrument without a camera obscura. From "Rosa Ursina" by Christoph Scheiner (Bracciano, 1630). Engraving.

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Photos12.com - Ann Ronan Picture Library

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Photo12/Ann Ronan Picture Library

Notre référence

ARP07113_010556P

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Droits gérés

Format disponible

34,0Mo (1,8Mo) / 28,4cm x 30,0cm / 3352 x 3543 (300dpi)