Êtes-vous un étudiant de l'EPFL à la recherche d'un projet de semestre?
Travaillez avec nous sur des projets en science des données et en visualisation, et déployez votre projet sous forme d'application sur Graph Search.
Concept
Domenico Troili
Résumé
Domenico Troili (1722–1792) was an Italian abbate and a Jesuit, who held the appointment of custodian of the library of the ruling family of Este in Modena. He is recognized as the first person who documented the fall of a meteorite, in 1766.
Troili was a pupil of Roger Joseph Boscovich at the Collegio Romano, and supported his master's atomic theory explaining the properties of matter.
In 1766, Troili witnessed the fall of a stone from the sky near the town of Albareto, in the Duchy of Parma, Italy. He collected reports from many other eyewitnesses, closely examined the stone and detected in it small grains of a brassy mineral. He called the material "marchesita" (from Italian "little marchioness"). Troili summarized the results of his research in a 43-page document, Ragionamento della caduta di un sasso ("Concerning the fall of a stone from the air") published in Modena in 1766.
The report by Troili said that at about five hours after midday, when the sky was clear except for some clouds over the mountains on the far horizon, many people leaving their fields suddenly saw distant flashes of lightning and heard thunder. This rose in a crescendo of cannonading with loud explosions overhead. Numerous people saw a body streak across the sky and plunge to the ground. To some, the trail looked bright and fiery; to others, dark and smoky. The body hit the ground with such a force that a cow was knocked off its feet and two women clung to trees to avoid falling. The stone made a hole a meter deep in the earth and instantly broke into many pieces. It was a stone that was very heavy, irregular in shape, and magnetic. The outer surface looked as though it had been burned by fire. The inner parts looked much like sandstone with small steely sparkles.
Approximately 2 kilograms of the stone were recovered. Today its small fragments are dispersed in numerous museums and laboratories, with the largest piece of 605 g located in the Museum of the University of Modena. The main component of the meteorite was long assumed to be pyrite, FeS2.
Source officielle
À propos de ce résultat
Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.