Why did the meteor bombardment slow?

Answer 1

Meteor showers start when Earth is travelling through the remains of a trail of a comet or other dirty parts of space. As it encounters the dirt and debris they burn up in our atmosphere. The edges of the trail have little debris, but as Earth goes further in, there is more and once it passes the middle it starts to thin out again, which is why the meteor shower starts with very few, then increasesand then starts to decline again.