Alexis Bouvard
French astronomer
Alexis Bouvard was a French astronomer. He is particularly noted for his careful observations of the irregularities in the motion of Uranus and his hypothesis of the existence of an eighth planet in the Solar System. Wikipedia
Born: June 27, 1767, Les Contamines-Montjoie, France
Died: June 7, 1843 (age 75 years), Paris, France
Discovered: C/1797 P1 (Bouvard-Herschel) and C/1798 X1 Bouvard