Charles Joseph Étienne Wolf (9 November 1827 in Vorges – 4 July 1918) was a French astronomer.
In 1862, Urbain Le Verrier offered him a post as assistant at the Paris Observatory.
In 1867 he and Georges Rayet discovered Wolf–Rayet stars.
He was elected to the positions of Vice-President (1897) and President (1898) of the French Academy of Sciences.[1]