François Arago

Definition and stakes

Portrait of Agnes Mary Clerke Agnes Mary Clerke 1911 Encyclopædia Britannica (1911)

The first fruits of his labours were contained in two memoirs presented to the Academy, September 16 and October 14, 1839. Pursuing the investigations of Laplace, he demonstrated with greater rigour the stability of the solar system, and calculated the limits within which the eccentricities and inclinations of the planetary orbits vary. This remarkable début excited much attention, and, on the recommendation of François Arago, he took in hand the theory of Mercury, producing, in 1843, vastly improved tables of that planet.
Source: Wikisource

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In 1806 he was sent to Valencia in Spain, and to the neighboring island of Iviza, to make the astronomical observations for prolonging the arc of the meridian from Dunkirk southward, in order to supply the basis for the metric system.
Here begin his extraordinary adventures, which are told with inimitable spirit and vigor in his 'Autobiography.' Arago's work required him to occupy stations on the summits of the highest peaks in the mountains of southeastern Spain. The peasants were densely ignorant and hostile to all foreigners, so that an escort of troops was required in many of his journeys.
Source: Gutenberg

Ralph Temple Enterprise and Adventure (1870)

The observation that the lives of men of learning rarely present any romantic incidents receives a striking contradiction from the biography of the late M. Arago. When only twenty years of age this celebrated savant was entrusted with the important and difficult task of continuing the measurement of the meridian line in Spain, left unfinished by the untimely death of the distinguished mathematician Méchain.
Source: Wikisource

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