Stein, Johann Willem Jakob Antoon
BornGrave, Netherlands, 27 February 1871
DiedRome, Italy, 27 December 1951
Johann Stein joined the Society of Jesus and studied astronomy at the University of Leiden under Hendrik Lorentz. He became an assistant at, and then director of, the Vatican Observatory (1930–1951). It was Stein who supervised the Observatory’s 1933 move to Castel Gandolfo. He did much to modernize the Observatory, for instance, adding an astrophysical laboratory.
A variable star observer, Father Stein finished publication of Johann Hagen’s Atlas Stellarum Variabilium (1899–1947).