Perseid Meteor Shower
The first Perseid fireballs of 2013 are arriving now. Earth is entering a stream of debris from parent comet 109P/Swift-Tuttle, and meteoroids are hitting the top of the atmosphere at 135,000 mph. The maximum is coming. Meteor rates should remain low for the next week as Earth penetrates the sparse outskirts of the debris stream, then skyrocket to 100+ meteors per hour as the calendar turns to the second week of August. Forecasters expect maximum Perseid activity on the nights of August 12-13.