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.
Aurora alerts: Sign up for Spaceweather Alerts and get a text message when auroras appear in your area.
Above: Dusty debris from Comet Swift-Tuttle is crossing the orbit of Earth.
