In Revelation there are some prophecies that speak about what seems to be celestial events and could be swarms of asteroids or comets on a collision course with Earth.
7The first angel sounded his trumpet, and there came hail and fire mixed with blood, and it was hurled down on the earth. A third of the earth was burned up, a third of the trees were burned up, and all the green grass was burned up.
8The second angel sounded his trumpet, and something like a huge mountain, all ablaze, was thrown into the sea. A third of the sea turned into blood, 9a third of the living creatures in the sea died, and a third of the ships were destroyed.
10The third angel sounded his trumpet, and a great star, blazing like a torch, fell from the sky on a third of the rivers and on the springs of water— 11the name of the star is Wormwood.a A third of the waters turned bitter, and many people died from the waters that had become bitter.
12The fourth angel sounded his trumpet, and a third of the sun was struck, a third of the moon, and a third of the stars, so that a third of them turned dark. A third of the day was without light, and also a third of the night.
The thing about prophecies is that they are impossible to figure out until after they have happened except in their general sense. Comets are indeed like hail or large conglomerates of ice and asteroids could be aptly described as large mountains. It is interesting that there is so much much effort being paid by scientists toward asteroid collision detection these days and an emphasis on learning how to deflect their paths away from Earth. Perhaps we should be paying more attention to the stars as this seems to be a prophetic event culminating in Jesus Christ’s grand finale.