scholarly journals Johannes Kepler: The Sky as a Retinal Image

Perception ◽  
2014 ◽  
Vol 43 (12) ◽  
pp. 1283-1285 ◽  
Author(s):  
Alan Gilchrist
2020 ◽  
pp. 103-131
Author(s):  
Erin Webster

This chapter provides a new intellectual context for John Milton’s treatment of light and vision in Paradise Lost (1667) by locating Milton’s poem within the framework of seventeenth-century optical theory. It does so by examining the parallels and distinctions between the role played by light in Milton’s model of vision and models proposed by Johannes Kepler and René Descartes. The main argument of the chapter is that Milton adopts Kepler’s theory of the retinal image, which posits that the human eye operates according to the mechanical principles of a camera obscura. But where Kepler and Descartes use the analogy of the camera obscura to explain the properties of light as it relates to vision, Milton uses it to express the fragility of vision within this new model. Speaking from a position of blindness, Milton’s narrator explores the theological and epistemological implications of having light at ‘one entrance quite shut out’, thereby being ‘presented with a Universal blanc’ (PL 3.48–50) in the place of the retinal projection screen.


1973 ◽  
Vol 109 (1) ◽  
pp. 175 ◽  
Author(s):  
Yulii A. Danilov ◽  
Ya.A. Smorodinskii
Keyword(s):  

Author(s):  
Erin Webster

The Curious Eye explores early modern debates over two related questions: what are the limits of human vision, and to what extent can these limits be overcome by technological enhancement? Today, in our everyday lives we rely on optical technology to provide us with information about visually remote spaces even as we question the efficacy and ethics of such pursuits. But the debates surrounding the subject of technologically mediated vision have their roots in a much older literary tradition in which the ability to see beyond the limits of natural human vision is associated with philosophical and spiritual insight as well as social and political control. The Curious Eye provides insight into the subject of optically mediated vision by returning to the literature of the seventeenth century, the historical moment in which human visual capacity in the West was first extended through the application of optical technologies to the eye. Bringing imaginative literary works by Francis Bacon, John Milton, Margaret Cavendish, and Aphra Behn together with optical and philosophical treatises by Johannes Kepler, René Descartes, Robert Hooke, Robert Boyle, and Isaac Newton, The Curious Eye explores the social and intellectual impact of the new optical technologies of the seventeenth century on its literature. At the same time, it demonstrates that social, political, and literary concerns are not peripheral to the optical science of the period but rather an integral part of it, the legacy of which we continue to experience.


2021 ◽  
Vol 52 (2) ◽  
pp. 147-167
Author(s):  
Christopher M. Graney

This paper discusses measurements of the apparent diameter and parallax of the star Sirius, made in the early 18th century by Jacques Cassini, and how those measurements were discussed by other writers. Of particular interest is how other writers accepted Cassini’s measurements, but then discussed Sirius and other stars as though they were all the same size as the sun. Cassini’s measurements, by contrast, required Sirius and other stars to dwarf the sun—something Cassini explicitly noted, and something that echoed the ideas of Johannes Kepler more than a century earlier.


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