NASA writes, The 2009 Orionid Meteor Shower "'Earth is passing through a stream of debris from Halley's Comet, the source of the Orionids,' says Bill Cooke of NASA's Meteoroid Environment Office. 'Flakes of comet dust hitting the atmosphere should give us dozens of meteors per hour.' The best time to look is before sunrise on Wednesday, Oct. 21st."
"Since 2006, the Orionids have been one of the best showers of the year, with counts of 60 or more meteors per hour," says Cooke.
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