http://science.nasa.gov/science-news/science-at-nasa/2010/05aug_perseids/
"The show begins at sundown when Venus, Saturn, Mars and the crescent Moon pop out of the western twilight in tight conjunction."
"The Perseid meteor shower is caused by debris from Comet Swift-Tuttle. Every 133 years the huge comet swings through the inner solar system and leaves behind a trail of dust and gravel. When Earth passes through the debris, specks of comet-stuff hit the atmosphere at 140,000 mph and disintegrate in flashes of light. These meteors are called Perseids because they fly out of the constellation Perseus."
"2010 is a good year for Perseids because the Moon won't be up during the midnight-to-dawn hours of greatest activity. "
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