Several Dooms Day theories reflect that the Earth will be hit by an asteroid causing global distruction. They based on Biblical prophecies - Sign in the Heavens.
Revelation 8:8 -- "and the second angel sounded, and as it were a great mountain burning with fire was cast into the sea and the third part of the sea became blood."
Verse 10 -- "and the third angel sounded, and there fell a great "astare" from Heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of the waters;"
Verse 11 -- "and the name of the star is called Wormwood?"
Revelation 16:21 -- "and there fell upon men a great hail out of heaven, every stone about the weight of a talent and men blasphemed God for the plague there of was exceeding great."
Revelation 18:21 -- "and a mighty angel took up a stone like a great millstone, and cast it into the sea saying, 'thus with violence shall that great city Babylon be thrown down, and shall be found no more at all."
Personally, I do not believe that an asteroid will hit the Earth. A light will be see in the heavens by everyone simultaneously - perhaps viewed as an eclipse. This will be followed by the appearance of a blue-white light which will be witnessed by all. Through that light - souls will experience/project into reality - whatever - or whomever they wish to experience in an End Time Scenario - as all is projected illusion. Fear will turn to understaning and compassion as souls return to the light.