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MIDDLE TEMPLE LIBRARY / SCIENCE PHOTO LIBRARY MIDDLE TEMPLE LIBRARY / SCIENCE PHOTO LIBRARY
Kepler's 'Astronomiae Pars Optica' (1604), title page. This work, by German astronomer, mathematician and astrologer Johannes Kepler (1571-1630), is considered the founding text in the science of optics. Kepler wrote about the inverse-square law for light intensity, reflection, pinhole cameras, parallax, the apparent sizes of astronomical bodies, and the human eye. The Latin text includes the title (top), a description of the book, the author's name, and publication details (bottom) below the printer's mark. This work was published in Frankfurt by Claudium Marnium and Haeredes Joannis Aubrii, under the patronage of the Holy Roman Emperor Rudolf II.
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