Other astronomers such as Giovanni Domenico Cassini (1625–1712) and Giovanni Schiaparelli (1835–1910) made discoveries about the Solar System. In mathematics, Joseph Louis Lagrange (born Giuseppe Lodovico Lagrangia, 1736–1813) was active before leaving Italy. Fibonacci (c. 1170 – c. 1250), and Gerolamo Cardano (1501–1576) made fundamental advances in mathematics. Luca Pacioli established accounting to the world. Physicist Enrico Fermi (1901–1954), a Nobel prize laureate, led the team in Chicago that developed the first nuclear reactor and is also noted for his many other contributions to physics, including the co-development of the quantum theory and was one of the key figures in the creation of the nuclear weapon. He, Emilio G. Segrè (1905–1989) who discovered the elements technetium and astatine, and the antiproton), Bruno Rossi (1905–1993) a pioneer in Cosmic Rays and X-ray astronomy) and a number of Italian physicists were forced to leave Italy in the 1930s by Fascist laws against Jews.