2009 Orionid Meteor Shower Peak Begins

Halley's comet streaks through the twilight sky on January 9, 1986, in an image from the Cerro Tololo Inter-American Observatory in Chile. The annual Orionids meteor shower, created by debris left behind from Halley's comet, will peak on October 21, 2009. Photograph courtesy NOAO/AP

From National Geographic:

Earth is currently plowing through space debris left behind by a visitor that last swung by during the Reagan Administration.

Spawned by Halley's comet, which last buzzed the planet in 1986, the tiny space rocks are the seeds of the annual Orionid meteor shower.

At its peak before sunrise Wednesday morning, the Orionids shower should produce 20 to 25 meteors an hour—a "relatively decent show," according to astronomer Anita Cochran, of the University of Texas at Austin's McDonald Observatory.

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