Does the world end April 13, 2029?
No. Even if the asteroid 99942 Apophis hit Australia, resulting in year-round winter-like conditions and contamination of a third of the world’s water with sulfuric acid, I don’t think it would be the end of the world. Don’t get me wrong, it would be bad, with 100’s of millions dead, but it wouldn’t be the end of the world.
99942 Apophis will pass between the Earth and its communications satellites with the slight possibility of taking out some satellites while zooming by. I don’t think it will actually hit Earth in 2029, but there are likely other smaller asteroids that travel with it that will hit earth.
Remember 367943 Duende? No. I’m sure you don’t. But, the same day it was making its close approach, the 20 meter wide Chelyabinsk meteor blew apart over Russia with the force of a nuclear bomb, sending 1500 people to the hospital, and damaging 7200 buildings.
So, could a companion of Apophis hit Earth. Yeah. Honestly, that won’t likely affect me or anyone I know, so I’m not extremely concerned about a meteor hitting earth that day.
Now on the other hand, I would be very concerned about the change in trajectory of 99942 Apophis caused by this close approach. Also, it’s the asteroids you don’t see that get you. (Poor attempt at humor, but true.)