We see him now and again as a sort of comet passing across us.

The design, he said, was based on the concept of a comet.

A can of Comet was on the floor by her knees.

In old times, people used to be scared of comets.

Little is known about the nature and makeup of comets.

His ships full of comets are still found, now and again.

A piece of her comet has been lost and she cannot proceed without it.

He is also prominent in the search for and study of comets.

In the case of lost comets this is especially tricky.

The rain of comets had begun a century ago and continued ever since.