Callisto III e la Cometa di Halley: la ricerca di Johan Stein SJ tra   leggenda e storia
  The Dutch Jesuit astronomer Johan Stein published in 1909 a text about the legend on a papal bull of Pope Callixtus III against the comet of 1456. This comet happened to be the Halley's one. The original documents, either chronicles and observations, and coeval testimonies are deeply investigated by Stein and the falsity of that legend is clearly demonstrated. In the occasion of the 200 years of the restoration of the Societas Jesu made in 1814 by Pope Pius VII an Italian edition of the full text of Johan Stein is here presented. 
Costantino Sigismondi
physics.hist-ph