For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved.

And it was told the old man: Behold thy son Joseph cometh to thee. And being strengthened, he sat on his bed.

Rosetta will try to land on a comet in a few hours.

Halley's comet makes an appearance once every 76 years.

The Perseids are fragments of the comet Swift-Tuttle, which orbits between the Sun and beyond the orbit of Pluto once every 133 years.

When comet 45P zipped past Earth early in 2017, researchers observing from NASA’s Infrared Telescope Facility, or IRTF, in Hawaii measured the levels of nine gases released from the icy nucleus into the comet’s thin atmosphere, or coma.

Halley's comet is depicted inside the Bayeux Tapestry.

Don't confuse comets and asteroids.

Old men and comets are revered for the same reasons: their long beards and their pretensions to predict events.

Most comets are thought to originate in a huge cloud called the Oort Cloud.