The buggers had already beaten the main human fleet out in the comet shield, wiping out the earliest starships and making a mockery of human attempts at high strategy—that film was often shown, to arouse again and again the agony and terror of bugger victory.
Everybody thinks we have a huge fleet of warships waiting in the comet shield.
The videos of the Second Invasion, when they were destroying our fleets out in the comet shell.
The only name they knew was that of Peter Wiggin, the Hegemon of Earth; the only news that came was news of peace, of prosperity, of great ships leaving the littoral of Earth’s solar system, passing the comet shield and filling up the bugger worlds.
There are no more uses of "comet" in the book.
Show samples from other sources
I look under the sink and find a dried-out Brillo pad and a can of Comet.
Lauren Oliver -- Before I Fall
Three of us had giant camping flashlights, the glow illuminating jarring images: It was suburbia, post-comet, post-zombie, post-humanity.