Results 11 to 20 of about 5,511 (201)
Cahiers François Viète, 2023 Simon Newcomb argued that nineteenth century observatory practices were dominated by the German school of practical astronomy devised by Friedrich Wilhelm Bessel. A key tenet of this school was the mathematical correction of instrumental errors.
Daniel Belteki
doaj +1 more source
Cahiers François Viète, 2016 This study, the first of its kind, aims to draw up a first overview of the installation and evolution of naval observatories dedicated to the time service and the astronomical training of sailors.
Guy Boistel
doaj +1 more source
Astronomy and Diplomacy at the Court of King João V of Portugal
Cahiers François Viète, 2017 During the reign of King João V of Portugal (r.1707-1750), astronomy took part in a movement of cultural renewal and gave impulse to notable international exchanges, which were promoted by the absolutist monarch himself.
Luís Tirapicos
doaj +1 more source
Les signaux horaires français : la quête d’un système uniformisé
Cahiers François Viète, 2016 In the middle of the 19th century, six chronometric observatories of the French Navy provided a time service for the control of marine watches. A ministerial decree of 1858 required French ports to transmit a time signal at a fixed time to ships in ...
Olivier Sauzereau
doaj +1 more source
Cahiers François Viète, 2016 In the 19th century, knowledge of the time on board ships was essential for managing navigation. The “time-ball” system, initially installed in English ports from 1829, was gradually developed in various countries. One of the arguments for the foundation
Jérôme Noë (de La)
doaj +1 more source
Cahiers François Viète, 2017 This paper presents a tentative overview of colonial observatories in the Third Portuguese Empire (1825-1957). The main issue under focus is the problem of action from a distance, that is, the attempts to steer an imperial network of observation from ...
Pedro M.P. Raposo
doaj +1 more source
Jules Janssen : un refusé à l'ombre du soleil
Cahiers François Viète, 2015 Born into a middle-class family where art plays a major role, Jules Janssen was a self-taught scientist and had to work in the bank and then as a tutor while collecting university degrees.
Stéphane Le Gars
doaj +1 more source
Cahiers François Viète, 2017 At the beginning of the 20th century, Portuguese astronomy was still firmly anchored in the past. Only astronometric research was pursued and Portuguese professional astronomers seldom published their results.
Vitor Bonifácio
doaj +1 more source
The Portuguese Astronomical Activity in the Late 18th and Early 19th Centuries
Cahiers François Viète, 2017 In the late 18th century and beginning of the 19th century, the Portuguese centre of gravity for astronomical research (and teaching) was the Royal Astronomical Observatory of the University of Coimbra.
Fernando B. Figueiredo
doaj +1 more source
An update on dissolved methane distribution in the subtropical North Atlantic Ocean [PDF]
Ocean Science, 2022 Methane (CH4) is a potent greenhouse gas and plays a significant role in recent increasing global temperatures. The oceans are a natural source of methane contributing to atmospheric methane concentrations, yet our understanding of the oceanic methane ...
A. Kolomijeca +7 more
doaj +1 more source