Meanwhile, a continual hail of smaller comets provided Earth with both water and organic building blocks.

None of these smaller comets has survived its perihelion passage.

It looked as if a small comet had struck his palm.

He saw what looked like a small comet of fire with a rope tail.

They've chewed up nine or ten small comets that way in the last few years.

What makes the recent announcement so startling is that it suggests a new class of small, previously unseen comets up to 40 feet wide.

"It's quite possible," he said, "that all the carbon in our trees and bodies has come in on these small comets."

The door opened quickly, orange light spilled out into the night, and Wren shot past the mage like a small brown comet.

The flame of the candle streaked downward through the air like a small comet, went out on the floor.

I understand that the theory here is to make our signature similar to that of a small comet or meteor.