BE ALERT FOR PERSEID FIREBALLS: Earth is entering a stream of debris from giant Comet Swift-Tuttle, source of the annual Perseid meteor shower. Forecasters say the shower won’t peak until Aug. 12-13, but already NASA cameras are catching Perseid fireballs streaking over the USA. The Perseids produce more fireballs than any other annual shower–largely due to the size of the parent comet–so your chances of seeing one are good. Visit today’s edition of Spaceweather.com for observing tips.
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