Hevelius's book on comets. Title page of Cometographia (1668), by the Polish astronomer Johannes Hevelius. Shown are three astronomers representing three theories about comets. From left, the theories are: Aristotle's sublunar theory (that comets orbit between the Moon and the Earth); Hevelius's theory that comets originate from Jupiter or Saturn and follow parabolic paths around the Sun; and Kepler's theory that comets move in a straight line. On the roof of the building (right), telescopes and sextants are being used to observe a comet (top left). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Library of Congress |
Bildgröße: | 3561 px × 4984 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |