Perseid Meteor Shower 2009: Cosmic Show Tonight

Sky watchers could catch a dazzling treat on Tuesday and Wednesday, with the peak of the annual Perseid meteor shower. Meteors are bits of dust or rock that collide with Earth's atmosphere and heat up gas particles to produce a glowing trail. A handful of meteors can be seen each hour on any clear night, but during a meteor shower dozens may be visible. The Perseid shower occurs each year when the Earth passes through a stream of debris shed by the comet Swift-Tuttle, which orbits the sun once...Full Story
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