Cacciatore G., 1878/79 — In commemorazione del P Angelo Secchi

. In 4to, offp., pp. 11. Estratto da Atti Acc. Sci. Lett e Arti di Plaermo, N.S. vol. VI. Father Pietro Angelo Secchi SJ: 29 June 1818 - 26 February 1878) was an Italian astronomer. He was Director of the Observatory at the Pontifical Gregorian University (then called the Roman College) for 28 years. He was a pioneer in astronomical spectroscopy, and was one of the first scientists to state authoritatively that the Sun is a star.