He continued his studies at the Roman College, and demonstrated great scientific ability. In 1839, he was appointed tutor of mathematics and physics at the college. In 1841, he became professor of physics at the Jesuit College in Loreto. In 1844, he began theological studies in Rome, and was ordained a priest on 12 September 1847. In 1848, due to the Roman Revolution, the Jesuits were ordered to leave Rome. Angelo Secchi spent the next two years in the United Kingdom at Stonyhurst College, where he met the Jesuit astronomer, Alfred Weld in charge of the Stonyhurst Observatory, who may have inspired him to take up the science. He moved on to the United States, where he taught for a time at Georgetown University in Washington, D.C. He also took his doctoral examination in theology there.