Today marks the death of Father Angelo Secchi (1818-1878), Jesuit scientist and inventor. Born in northern Italy, he joined the Jesuits at age sixteen. Ordained in 1847, he was soon assigned to direct the observatory at the Gregorian University, a position he held until his death. His contributions to science were numerous. He was active in oceanography, meterology and physics. He was the first to make systematic use of spectroscopy in stellar classification. He also invented what is known as... Read more