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

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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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Size: 2880px × 3044px
Photo credit: © Universal History Archive/UIG/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1630, astronomy, blocked, bracciano, camera, christoph, construct, engraving, image, indirect, instrument, instrument., mounting, obscura, projected, refracting, rosa, safely, scheiner, science, scientific, screen, studied, sun, sunlight, sunspots, telescope, ursina