Leverrier


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Leverrier

Urbain Jean Joseph . 1811--77, French astronomer: calculated the existence and position of the planet Neptune
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Kahwaji said troops being ambushed by fighters on the way to Aleppo were arriving "with broken morale." But Leverrier pointed out that the regime can still count on some support inside the city, "particularly among certain tribes that were rewarded for having helped the regime in its fight against the Muslim Brotherhood in the 1980s." A decisive factor, he said, could be the Kurdish community, which makes up 20 percent of the city.
In 1995 Jacques Laskar, who is LeVerrier's intellectual successor at Paris Observatory, published the results of an interesting numerical experiment.
The essential test for a theory of gravitation at that time was whether it explained the anomalous perihelion precession of the orbit of Mercury, first calculated by Leverrier in 1859.
In 1846, Urbain Leverrier in France, and John Adams in England used Newton's gravitational laws to independently predict that variations in the orbit of Uranus were due to the influence of an eighth planet.
(18.) Leverrier Y, Okkenhaug K, Sawyer C, Bilancio A, Vanhaesebroeck B, Ridley AJ.
Adams y Leverrier sabian que la trayectoria de Urano sufria desviaciones debidas con bastante probabilidad a la presencia de una masa considerable de materia en sus proximidades.
'Vulcan (a mistakenly hypothesized object of 19th century astronomy) is a planet' is false, but 'LeVerrier believed/conjectured/claimed that Vulcan is a planet' is true.
Astronomers John Adams and Urbain Leverrier, each on his own, decided to modify ad hoc some data presupposed by celestial mechanics in order for them to fit the predictions of Newtonian physics.