They sent giant comets plummeting down to batter the gas planet with the force of atomic warheads.

Pluto may also be a giant comet.

"Even if there is a giant comet about to hit the Earth, just what good do you expect these bags to do?"

"Like a giant comet," Paris suggested.

One of the most frequent descriptions I've seen over the past few months is 'giant comet.'

It is not out of the question that Pluto and its satellite are some giant double comet, essentially inactive at their great distance from the sun.

According to Whiston, the original "chaos" was the tail of a giant comet.

A giant comet will crash into Jupiter in July with a force greater than the largest nuclear bombs ever built, scientists said Wednesday.

Despite weak reviews, that disaster film, about a giant comet hurtling toward Earth, has grossed more than $74 million in its first 10 days.

Well, nobody told that giant comet out there to stop disintegrating just because the Klingons fired on our research vessel.