There is a Catholic Saint, not Malachy, that speaks of destruction that comes from a near miss comet and debris field.
Benedict canonized her and she had predictions regarding the signs of the last Pope.
“Before the Comet comes, many nations, the good excepted, will be scoured with want and famine. The great nation in the ocean that is inhabited by people of different tribes and descent by an earthquake, storm and tidal waves will be devastated. It will be divided, and in great part submerged. That nation will also have many misfortunes at sea, and lose its colonies in the east through a Tiger and a Lion.
The Comet by its tremendous pressure, will force much out of the ocean and flood many countries, causing much want and many plagues. [After the] great Comet, the great nation will be devastated by earthquakes, storms, and great waves of water, causing much want and plagues. The ocean will also flood many other countries, so that all coastal cities will live in fear, with many destroyed. All sea coast cities will be fearful and many of them will be destroyed by tidal waves, and most living creatures will be killed and even those who escape will die from a horrible disease.
http://www.freerepublic.com/focus/f-religion/2822214/posts
All that would be interesting if it wasnt for the fact that there are comets every single year. That people, good and bad, are scoured with want and famine. That there are natural disasters every month, and comets don’t exert enough gravity to affect anything. They are loose balls of gravel and ice that easily break apart if tugged on hard enough.