KEPLER AND THE STARS
Kepler, German astronomer, develops the scientific principles of the camera obscura and applies magic shadows to the stars of the heavens--Scheiner and D'Aguilon improve image devices.
JOHANNES KEPLER, the great astronomer, advanced the art- science of magic shadows by developing the theory of the projection of images as well as the scientific use of multiple lenses and the camera obscura or "dark chamber". Da Vinci told how the camera could be used; Porta tried it out for entertainment on a considerable scale but there still was need for penetrating attention from a scientist. That Kepler supplied.
Kepler was a precocious child though he suffered from poor health. He had no special interest or inclination towards astronomy until in 1594, at the age of 23, he found himself required to teach a class in that subject. Soon he became an expert and before his death announced the Kepler laws explaining the planetary system. In 1600 Kepler became assistant to Tycho Brahe ( 1546- 1601), the greatest practical astronomer to that date but one who rejected the Copernican theory that the earth and planets revolve around the sun, a theory which was firmly proved by Kepler. Brahe lost the tip of his nose in a duel, so he wore a gold one, carrying with him cement with which to stick on the tip whenever it fell off.
A few years after becoming astronomer to the Emperor, Kepler published, in 1604, Ad Vitellionem Paralipomena-- "Supplement to Witelo"; Witlelo, a Pole called Thuringopolonus,