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First things first: What are Perseids?
The Perseid shower happens every August when Earth, in its orbit around the sun, runs into space debris left behind by the comet Swift-Tuttle. That brings cosmic dust into the atmosphere, where it vaporizes into fiery streaks in the sky.
This year's Perseids will be particularly excellent, because the moon, a waxing crescent, will set shortly after midnight. That will leave the sky nice and dark during prime viewing hours.
(Photo: Perseids in Iran, 2011).