Other eyewitnesses depose that they observe an incandescent object of enormous proportions hurtling through the atmosphere at a terrifying velocity in a trajectory directed southwest by west. Messages of condolence and sympathy are being hourly received from all parts of the different continents and the sovereign pontiff has been graciously pleased to decree that a special missa pro defunctis shall be celebrated simultaneously by the ordinaries of each and every cathedral church of all the episcopal dioceses subject to the authority of the Holy See in sufferage of the souls of those faithful departed who have been so unexpectedly called away from our midst. (U 12.1879-1888)

That's a neat passage. What does it mean?