Urbain Le Verrier
As a young man, he entered the Royal Army and held, at one time, the rank of Staff Officer. He resigned his commission, and went to Paris, where he did doctoral studies in mathematics under Augustin Cauchy, and Urbain Le Verrier, who both shared in the discovery of the planet Neptune. He was in close contact with the mathematicians François-Napoléon-Marie Moigno and Charles Hermite.