It will suck erosion of heaven in the sky fly dust, make the sky more blue.

Most comets that fly into the inner solar system seem to come from the outer region of the Oort cloud - a region of icy dust and debris left over from the birth of the solar system.

A piece of blood-stained paper, caught up from some meat-buyer's dust-heap, beat up and down the road without the gate; too flimsy to rest, too heavy to fly away; and a few straws kept it company.