Kepler Optica

A plate from Johannes Kepler’s Ad Vitellionem Paralipomena, quibus Astronomiae Pars Optica (1604), illustrating the structure of eyes.


Image from wikimedia commons (link)

The Renaissance astronomer and astrologer Johannes Kepler is best known for his discovery of the three principles of planetary motion, by which he clarified the spatial organization of the solar system. Moreover, he founded modern optics by presenting the earliest correct explanation of how human beings see. He was the first to set forth accurately what happens to light after it enters a telescope, and he designed a particular form of that instrument. His ideas provided a transition from the ancient geometrical description of the heavens to modern dynamical astronomy, into which he introduced the concept of physical force.

(from Univ Oregon – link)

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