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Johan Willem Jakob Antoon Stein (27 February 1871–27 December 1951) was a Dutch astronomer and a member of theSociety of Jesus.
He was born inGrave, Netherlands and spend his youth inMaastricht. In 1894 he finished a course of ecclesiastical philosophy, then studied astronomy at theUniversity of Leyden. His doctoral dissertation was on theHorrebow method for determining latitude.[1] By the time he received his doctorate in 1901, he had begun teaching physics and math at the St. Willebrord College ofKatwijk. He was ordained to priesthood in Maastricht, 1903.
From 1906–1910 he served as an assistant at theVatican Observatory. Thereafter he joined St. Ignatius College in Amsterdam, where he taught math and science for the next twenty years. In 1922 he became a member of theI.A.U. Commissions for Variable Stars. After 1924, he joined the Association of Dutch Amateur Astronomers. In 1930 he became director of the Vatican Observatory.[2] He was responsible for the modernization of the observatory, as well as its relocation toCastel Gandolfo in 1933.[3] He died in Rome, Italy.
Queen Juliana made him a knight of theOrder of the Lion of the Netherlands.[2] The craterStein on thefar side of theMoon is named after him.[4]
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