![]() ![]() He determined its period of revolution to be about 16 days, and noted that the satellite moved in the same plane as the ‘arms’ of Saturn. "With the first telescope he and his brother had built, Huygens discovered, in March 1655, a satellite of Saturn, later named Titan. On 25 March 1655 he directed his telescope towards the planets, first to Venus and Mars, later to Jupiter and Saturn. The telescopes constructed by Huygens were the best and most powerful of his time. The original objective of this telescope (0.32 cm thick, 5.7 cm diameter) is now kept in the Museum Boerhaave at Leiden. (twelve feet), an estimated ocular focal length of 7.5 cm, and a magnification of about 50. ![]() In early 1655, the Huygens brothers completed a telescope with an objective focal length of 377 cm. The title of the book reads “The System of Saturn, or On the matter of Saturn's remarkable appearance, and its satellite, the new planet.”Īround 1654 Huygens and his brother Constantijn devised a new and better way of grinding and polishing lenses. The work was preceded by a one-sentence anagram by planted by Huygens in Petrus Borel’s “De vero telescopii inventore” (1655/56) to secure priority of his discovery. The first edition of Huygens’ announcement of the discovery of the rings of Saturn and the planet’s enormous moon, Titan. Vellum scuffed and marked with minor soiling. First work with 11 engravings in the text, several woodcut diagrams, and 1 folding engraved plate. Very fine copies in contemporary vellum with a very pale damp-stain to leading edge of a few leaves. Collation: *4, A-I4įIRST EDITION of Huygens' landmark work on Saturn bound with the FIRST EDITION of Huygens’ work on the quadrature of the circle, “De circuli magnitudine inventa.”(1654). Accedunt eiusdem problematum quorundam illustrium constructiones. Plus 1 folding engraved plate.ĭe circuli magnitudine inventa. Huygens, Christiaan (1629-1695) Systema Saturnium, sive de causis mirandorum Saturni phaenomenon, et comite eius planeta novo. ![]()
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