He is best known for his observation, made around 1667, that the second brightest star (called
Algolin Arabic) in the constellation of Perseus varied in brightness. It is likely that others had observed this effect before, but Montanari was the first named astronomer to record it. The star's names in Arabic, Hebrew and other languages, all of which have a meaning of " ghoul" or " demon", imply that its unusual behaviour had long been recognised. In the Western world, earlier observers may have been inhibited from publishing by the insistence of the Christian church that the universewas immutable.
Montanari was born in
Modena, studied lawin Florence, and graduated from the University of Salzburg. In 1662 or 1663 he moved to Bologna, where he drew an accurate map of the Moonusing an ocular micrometerof his own making. He also made observations on capillarityand other problems in statics, and suggested that the viscosityof a liquid depended on the shape of its molecules. In 1669 he succeeded Giovanni Cassini as astronomy teacher at the observatoryof Panzano, near Modena, where one of his duties was to compile an astrological almanac. He did so in 1665, but perpetrated a deliberate hoax by writing the almanac entirely at random, to show that predictions made by chance were as likely to be fulfilled as those made by astrology. In the period shortly after Galileo Galilei, experimentalists like Montanari were engaged in a battle against the more mystical views of scientistssuch as Donato Rossetti.
21 March 1676Montanari reported a sighting of a cometto Edmund Halley.
In 1679 Montanari moved to a teaching post in
Padua, but almost all records of this period of his life have been lost. A letter survives from 1682 recording a sighting of Halley's Comet. He also wrote on economics, observing that demand for a particular commodity was fixed, and making comments on coinage and the value of money (1683).
A crater on the Moon, at 45.8S, 20.6W, is named after him.
*"De motionibus naturalibus a gravitate pendentibus" (1667)
*"Pensieri fisico-matematici" (1667)
*"La Livella Diottrica" (The Spirit Level) (1674)
*"Trattato mercantile delle monete" (1680)
* [http://www.bo.astro.it/dip/Museum/english/sto1_10.html "The impact of Galilean culture - From Bonaventura Cavalieri to Gian Domenico Cassini", Bologna University Department of Astronomy 2004-4-10]
* [http://www.yourpharmacydeals.com/ Gian Domen 2006]
*"The Passions of the Atoms. Montanari and Rossetti: A Polemic Between Followers of Galileo" by Susana Gomez Lopez, Florence, Leo S. Olschki, 1997.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Geminiano Montanari — Geminiano Montanari. Geminiano Montanari (né le 1er juin 1633 à Modène et mort le 13 octobre 1687 à Padoue) était un astronome et un fabricant de lentilles … Wikipédia en Français
Geminiano Montanari — (* 1. Juni 1633 in Modena; † 13. Oktober 1687) war ein italienischer Astronom, Linsenschleifer und Befürworter des experimentellen Ansatzes in der Wissenschaft. Montanari studierte Rechtswissenschaften in Florenz … Deutsch Wikipedia
Montanari — ist der Familienname folgender Personen: Alano Montanari (* ?), italienischer Motorradfahrer Andrea Montanari (* 1965), italienischer Leichtathlet Antonio Montanari (1676–1737), italienischer Violinist und Komponist Christian Montanari (*… … Deutsch Wikipedia
Montanari (crater) — Coordinates 45°48′S 20°36′W / 45.8°S 20.6°W / … Wikipedia
Montanari — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Christian Montanari, né le 21 juin 1981, est un pilote automobile saint marinais. Danila Comastri Montanari, née le 4 novembre 1948 à Bologne, est une… … Wikipédia en Français
8421 Montanari — Montanari Designations MPC designation 8421 Named after Geminiano Montanari Alternate name(s) 1996 XA9 Orbital characteristics … Wikipedia
Liste der Biografien/Mon — Biografien: A B C D E F G H I J K L M N O P Q … Deutsch Wikipedia
Liste der Krater des Erdmondes/M — Liste der Krater des Erdmondes A B C D E F G H I J K L M … Deutsch Wikipedia
Oscar Nuccio — (Brindisi, 9 July 1931 – Rieti, 23 April 2004) was an Italian historian of economic thought. He taught the history of economic thought in the departments of political science at the University of Pisa, the University of Teramo, and Sapienza… … Wikipedia
Beta Persei — Datenbanklinks zu Algol Stern Algol (β Persei) Beobachtungsdaten Epoche: J2000.0 … Deutsch Wikipedia