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RE: Orionid meteor shower
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Earth is about to pass through a stream of debris from Halley's comet, source of the annual Orionid meteor shower.  Forecasters expect more than 15 meteors per hour to fly across the sky on Saturday morning, Oct. 22nd, when the shower peaks.
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Sky watchers, mark your calendars: The 2011 Orionid meteor shower is on its way, and scientists say it's expected to peak just before dawn on Oct. 21 and 22, otherwise known as Friday and Saturday of this week.
The Orionids occur each October as the Earth passes through a trail of dust left by Halley's comet. When one of those dust particles - about the size of a grain of sand - enters Earth's atmosphere, it excites the air molecules through which it passes, causing them to give off light.

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2011 Orionids Meteor Shower: Where Can Aussie Astronomers See It?

The Orionid meteor shower is the second one stargazers can look forward to in October. The more dramatic Draconid meteor shower blazed its way across the night sky in early October but for those who missed the Draconids, the Orionids offer a more reliable viewing that is no less spectacular.
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Comet Halley is noted for producing spectacular displays when it passes near Earth on its 76-year trip around the sun. But you don't have to wait until 2061 to see a piece of the comet -- you can do it now by observing the annual Orionid meteor shower. This video shows an Orionid meteor streaking across the skies of Western Ontario, Canada on Oct. 17, 2010.

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Orionids meteor shower
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Unless clouds block their view, stargazers may be in for a treat starting Sunday as the Orionids meteor shower will be active for more than one week.
But the Philippine Atmospheric Geophysical and Astronomical Services Administration (PAGASA) said the bright full moon may also interfere with the view.

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