  (in english): Urbain-Jean-Joseph Le Verrier was born in Saint-L\^o on March
11, 1811. He entered the Ecole Polytechnique in 1831, from which he was to
emerge 8th two years later. After first devoting himself to chemistry, in 1836
he obtained a position as an astronomy assistant at the Ecole Polytechnique.
This choice will decide his future career which culminates with the discovery
of Neptune in 1846. Le Verrier wrote more than 200 contributions in the Comptes
Rendus de l'Acad\'emie des Sciences. These contributions are very varied: some
original articles but also reports on publications published elsewhere,
sometimes even simple notes of a single page. The whole set gives a very vivid
vision of the development of the science of the XIXth century. At that time,
the Comptes Rendus are really a reflection of the debates of the sessions of
the Academy. They are published very quickly, and leave a large freedom of
speech to the authors. They are therefore a snapshot of the sometimes lively
polemics which animated the sessions of the Academy of Sciences. In this
limited essay, we will look to the first years of the career of Le Verrier
until the discovery of Neptune. (in french) Le Verrier a \'ecrit plus de 200
contributions dans les Comptes Rendus de l'Acad\'emie des Sciences . Ces
contributions sont le reflet des d\'ebats des s\'eances de l'Acad\'emie. Ils
sont publi\'es tr\`es rapidement, et laissent une tr\`es grande libert\'e de
parole aux auteurs. On y retrouve de mani\`ere instantan\'ee les pol\'emiques
parfois vives qui ont anim\'e les s\'eances de l'Acad\'emie des sciences. Dans
cet essai nous survolerons les premi\`eres ann\'ees de la carri\`ere de Le
Verrier jusqu'\`a la d\'ecouverte de Neptune.
