na June 1846, mgbe ọ hụrụ Le Verrier mbụ bipụtara atụmatụ nke mbara ala ahụ n'ogologo na ya myirịta na Adams atụmatụ, Airy kwenyesiri Challis ịchọ mbara ala. Challis vainly scoured elu-igwe nile August na September. Ka ọ dịgodị, Le Verrier site akwụkwọ ozi gwara Berlin Observatory onye na-enyocha mbara igwe Johann Gottfried Galle ịchọ na observatory si refractor. Heinrich d'Arrest Adams, a na-amụrụ na observatory, tụrụ aro ka Galle na ha nwere ike tụnyere a na-adịbeghị anya esereese nke map nke Verrier na mpaghara nke Le Verrier si buru amụma na ugbu a na ọnọdụ na-achọ mbara igwe nke a kpakpando, ka a ofu displacement ka a kpakpando. Na June 1846, mgbe ọ hụrụ na Le Verrier mbụ bipụtara atụmatụ nke mbara ala na ya yiri yiri Adams atụmatụ, Airy mere ka Challis chọọ mbara ala. Challis n'efu scoured elu-igwe n'oge nile August na September.
Akwụkwọ Neptune